Mitsubishi QJ71LP21 Reference Manual
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Mitsubishi QJ71LP21 Reference Manual

Q corresponding melsecnet/h network system melsec-q series
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Table of Contents

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Q Corresponding MELSECNET/H
Network System
Reference Manual
(Remote I/O network)
Mitsubishi Programmable
Logic Controller
QJ71LP21
QJ71LP21-25
QJ71LP21S-25
QJ71LP21G
QJ71LP21GE
QJ71BR11
QJ72LP25-25
QJ72LP25G
QJ72LP25GE
QJ72BR15

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Summary of Contents for Mitsubishi QJ71LP21

  • Page 1 Q Corresponding MELSECNET/H Network System Reference Manual (Remote I/O network) QJ71LP21 QJ71BR11 Mitsubishi Programmable QJ71LP21-25 QJ72LP25-25 Logic Controller QJ71LP21S-25 QJ72LP25G QJ71LP21G QJ72LP25GE QJ71LP21GE QJ72BR15...

  • Page 3: Safety Precautions

    • SAFETY PRECAUTIONS • (Always read these instructions before using this equipment.) Before using this product, please read this manual and the relevant manuals introduced in this manual carefully and pay full attention to safety to handle the product correctly. The instructions given in this manual are concerned with this product.
  • Page 4 [Design Precautions] DANGER • When performing control operations to a PLC (modifying data) in operation by connecting GX Developer to the CPU module or connecting personal computers to the intelligent functional modules, configure an interlocking circuit in a sequence program so that the safety of the overall system is maintained.
  • Page 5 [Installation Precautions] CAUTION • Do not directly touch the conducting parts and electronic parts of the module. This may cause the module to malfunction or fail. [Wiring Precautions] DANGER • Completely turn off the externally supplied power used in the system when installing or placing wiring.
  • Page 6 [Setup and Maintenance Precautions] CAUTION • Please read this manual thoroughly and confirm the safety enough before starting online operations (especially, program modifications, forced outputs, and operating status modifications), which are performed by connecting GX Developer via the MELSECNET/H network system to a CPU module running on another station. Performing incorrect online operations may damage the machinery or result in accidents.

  • Page 7: Revisions

    REVISIONS The manual number is given on the bottom left of the back cover. Print Date Manual Number Revision Oct., 2000 SH (NA) -080124-A First printing May., 2001 SH (NA) -080124-B Model addition QJ71LP21G, QJ72LP25G, QJ71LP21GE, QJ72LP25GE Correction Product Components, About The Generic Terms And Abbreviations, Chapter 1, Section 1.2, 2.4, 3.1.1, 3.1.2, 3.2.1, 3.2.2, 3.3.2, 4.2.1, 4.2.2, 4.8.2, Chapter 5, Section 5.1.5, 5.2.1, 6.1.2, 6.2.1, 6.3, 6.4, 7.1.1, 7.8, 8.1, 8.1.1, 8.1.4, 8.3.1, 8.3.2, Appendix 2, 3, 4, 5, Index...
  • Page 8 This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual.

  • Page 9: Table Of Contents

    INTRODUCTION Thank you for purchasing the MELSEC-Q series PLC. Before using the equipment, please read this manual carefully to develop full familiarity with the functions and performance of the Q series PLC you have purchased, so as to ensure correct use. Please forward a copy of this manual to the end user.
  • Page 10 4.1 Procedures Before Starting the Operation..................... 4- 1 4.2 Network Module Names and Settings....................4- 2 4.2.1 QJ71LP21, QJ71LP21-25, QJ71LP21G, QJ71LP21GE, QJ71BR11 (Remote master station) ... 4- 2 4.2.2 QJ72LP25-25, QJ72LP25G, QJ72LP25GE, QJ72BR15 ............... 4- 5 4.3 Installing and Uninstalling the Module....................4- 7 4.4 Stopping the CPU (Unintentional Output Prevention) ................
  • Page 11 4.10.3 Station order check test (optical loop system only) ..............4-27 4.10.4 Communication test ........................4-28 5 PARAMETER SETTINGS 5- 1 to 5-30 5.1 Remote Master Station Parameter Setting .................... 5- 5 5.1.1 Setting the number of module cards (Network type) ..............5- 5 5.1.2 Network settings..........................
  • Page 12 7.6 Reserved Station Function ........................7-17 7.7 Interrupt Settings............................. 7-18 7.8 I/O Assignment Function ........................7-19 7.9 Stopping/Restarting the Cyclic Transmission and Stopping Link Refreshing (Network Test) ..... 7-20 7.10 Multiplexed remote master function (QnPHCPU only) ................ 7-21 7.11 Multiplexed remote master function for redundant system (QnPRHCPU only)........7-36 7.11.1 Backup function of master operation on system switching between control system and standby system..........................

  • Page 13: Manuals

    (Sold separately) Conformation to the EMC Directive and Low Voltage Instruction When incorporating the Mitsubishi PLC into other machinery or equipment and keeping compliance with the EMC and low voltage directives, refer to Chapter 3, "EMC Directives and Low Voltage Directives" of the User's Manual (Hardware) included with the CPU module or base unit used.

  • Page 14: Generic Terms And Abbreviations

    Generic Terms And Abbreviations Generic term/abbreviation Description of generic term/abbreviation This is an abbreviation for a QJ71LP21, QJ71LP21-25, QJ71LP21S-25, QJ71LP21G, QJ71LP21GE MELSECNET/H network module. However, especially in cases to show QJ71LP21 different models, QJ71LP21, QJ71LP21-25, QJ71LP21S-25, QJ71LP21G and QJ71LP21GE are printed.

  • Page 15: Product Components

    Product Components Model name Part name Quantity QJ71LP21 QJ71LP21 MELSECNET/H Network Module (optical loop type) QJ71LP21-25 QJ71LP21-25 MELSECNET/H Network Module (optical loop type) QJ71LP21S-25 MELSECNET/H Network Module (optical loop type, with QJ71LP21S-25 external power supply function) QJ71LP21G QJ71LP21G MELSECNET/H Network Module (optical loop type)

  • Page 16: Overview

    Network system Communication speed Optical loop 25 Mbps MELSECNET/H Optical loop, coaxial cable 10 Mbps 1: QJ71LP21-25, QJ71LP21S-25, QJ72LP25-25 only Control station (MELSECNET/10 mode) Remote master station QCPU Control station (MELSECNET/H mode) GX Developer QCPU normal station QCPU normal station...

  • Page 17: Features

    (1) Achievement of a high-speed communication system High-speed data sending at a communication rate of 10 Mbps/25 Mbps is possible. (25Mbps is available for only the optical loop type QJ71LP21-25, QJ71LP21S-25 and QJ72LP25-25.) (2) Large-scale and flexible system configuration The link device has a larger capacity: 16384 points for the link relay (LB) and 16384 points for the link register (LW).
  • Page 18 1 OVERVIEW MELSEC-Q The following functions facilitate network connection: 1) Any station to be connected in the future can be specified as a reserved station. Specifying a station not actually connected as a reserved station prevents a communication error. (See Section 5.1.3 "Common parameter.") 2) It is not necessary to connect stations in order of the station Nos.
  • Page 19 1 OVERVIEW MELSEC-Q The redundant system uses the multiplex remote master function to control I/O modules and intelligent function modules. (The QnPRHCPU should be used in the redundant system.) If the multiplexed master station (control system) fails, the multiplex remote master function will switch the master station from "control system"...
  • Page 20 1 OVERVIEW MELSEC-Q (3) Providing versatile communication service Reading and writing of data for an intelligent function module that has been mounted to a remote I/O station can be easily performed. There are four methods available for reading and writing. Use GX Configurator to make the initial settings and automatic refresh settings in the intelligent function module parameters, and write them into the remote I/O module in the remote I/O station.
  • Page 21 1 OVERVIEW MELSEC-Q By refreshing the intelligent function module data into the remote I/O module's data register D by the automatic refresh setting of the intelligent function module parameters, the remote master station can read/write data from/to the data register D with READ or WRITE instruction.
  • Page 22 1 OVERVIEW MELSEC-Q (4) Enhanced RAS functions (Refer to Section 3.2.2 "RAS functions") (a) When a faulty station recovers and can resume normal operation, it automatically returns to the network to resume the data communication using the automatic return function. By using the loopback function (the optical loop system), it is possible to continue data transmission among operational stations by disconnecting faulty areas such as a part of the network where there is a cable...
  • Page 23 1 OVERVIEW MELSEC-Q (6) Strengthening network functions Intelligent function modules mounted to remote I/O stations can be diagnosed using the GX Developer system monitor. Intelligent function modules mounted to remote I/O stations can be diagnosed using the system monitor even if it is done via the network using a GX Developer connected to a remote master station or even if the GX Developer is directly connected to a remote I/O station.

  • Page 24: Abbreviations Used In The Text, Tables And Diagrams Of This Manual

    1 OVERVIEW MELSEC-Q 1.3 Abbreviations Used in the Text, Tables and Diagrams of This Manual (1) Abbreviations Abbreviations Name Remote master station Remote I/O station Multiplexed remote master Multiplexed remote sub-master (2) Marking format Station number (1 to 64) Abbreviation Network No.

  • Page 25: System Configuration

    2 SYSTEM CONFIGURATION MELSEC-Q 2 SYSTEM CONFIGURATION This introduces a system comprised of remote I/O networks. 2.1 Single Remote I/O Networks 2.1.1 Configuration (1) Optical loop system Up to 64 remote I/O modules can be connected to a remote master station. Always set the station number of the remote master station to 0.
  • Page 26 2 SYSTEM CONFIGURATION MELSEC-Q 2.1.2 Setting items Table 2.1 shows the setting items on the master module of the remote master station (MR) and the parameter setting items on GX Developer. Table 2.1 Remote master station setting items Setting items Remote master station (M Reference Network module switch...

  • Page 27: Setting Items

    2 SYSTEM CONFIGURATION MELSEC-Q Table 2.2 shows the setting items on the remote I/O module of the remote I/O station (R) and the parameter setting items on the GX Developer. Table 2.2 Remote I/O station setting items Setting items Remote I/O station (R) Reference Network module switch STATION NO.

  • Page 28: Multiple Remote I/O Network (Qnphcpu Only)

    2 SYSTEM CONFIGURATION MELSEC-Q 2.2 Multiple Remote I/O Network (QnPHCPU Only) 2.2.1 Configuration A multiplexed remote I/O network system includes a multiplexed remote master station and a multiplexed remote sub-master station. The multiplexed remote sub-master station takes control of remote I/O stations when the multiplexed remote master station fails.

  • Page 29: Setting Items

    2 SYSTEM CONFIGURATION MELSEC-Q 2.2.2 Setting items Table 2.3 lists the parameter setting items of the multiplexed remote master station (DM ) and multiplexed remote sub-master station (DSM Table 2.3 Setting Items of Multiplexed Remote Master Station and Multiplexed Remote Sub-Master Station Multiplexed remote Multiplexed remote Setting item...

  • Page 30: Available Device Ranges

    2 SYSTEM CONFIGURATION MELSEC-Q Table 2.4 lists the setting items can be set on a remote I/O module operating as a remote I/O station (R) and the parameter setting items can be set from GX Developer. Table 2.4 Setting Items of Remote I/O Station Reference Setting item Remote I/O station (R)

  • Page 31: Multiplexed Remote I/O Network For Redundant System (Qnprhcpu Only)

    2 SYSTEM CONFIGURATION MELSEC-Q 2.3 Multiplexed Remote I/O Network for Redundant System (QnPRHCPU Only) 2.3.1 Configuration The redundant system including QnPRHCPU utilizes the multiplexed remote I/O network system in order to control I/O modules and intelligent function modules. In the multiplexed remote I/O network system for the redundant system, the network module on the side of the control QnPRHCPU (started up as a control system) acts as a multiplexed remote master station and controls remote I/O stations, while the network module mounted on the side of the standby QnPRHCPU performs the sub-...

  • Page 32: Setting Items

    2 SYSTEM CONFIGURATION MELSEC-Q 2.3.2 Setting items Table 2.5 indicates the parameter setting items of the multiplexed remote master station (DM ) and multiplexed remote sub-master station (DSM In the redundant system, the same network parameters are set to both the control and standby systems.

  • Page 33: Available Device Ranges

    2 SYSTEM CONFIGURATION MELSEC-Q Table 2.6 lists the setting items on the remote I/O module, parameter setting items on GX Developer and intelligent function module parameter setting items on GX Configurator. Table 2.6 Setting Items of Remote I/O Station Setting item Remote I/O station (R) Reference Network module main module switch...

  • Page 34: Multiple Remote I/O Network

    2 SYSTEM CONFIGURATION MELSEC-Q 2.4 Multiple Remote I/O Network 2.4.1 Configuration A multiple remote I/O network system is a network system with many networks connected to it. Set so that a network number will not duplicate another. If there are no duplications, setting can be anywhere within a range from 1 to 239.

  • Page 35: Available Device Ranges

    2 SYSTEM CONFIGURATION MELSEC-Q Table 2.8 shows the setting items for the remote I/O module main module for the remote I/O station (R) and the parameter setting items from the GX Developer. Table 2.8 Remote I/O station setting items Setting items Remote I/O station (R) Reference Network module main module switch...

  • Page 36: Precautions When Configuring The System

    1 : Use a CPU module with the first 5 digits of the serial No. 02092 or later. Applicable function version Network module Multiplexed remote I/O network Multiplexed remote I/O network for redundant system 2 or remote I/O network QJ71LP21 QJ71LP21-25 Master module QJ71LP21S-25 QJ71LP21G Function version D or later Function version B or later...
  • Page 37 Q6 P, Q6 RP, Q61SP 6 Q61SP is applicable to Q3 SB. QC05B, QC06B, QC12B, QC30B, QC50B, Overall extension cable length: 13.2m or less QC100B QI60, QJ71LP21, QJ71LP21-25, QJ71LP21S- 25, QJ71LP21G, QJ71LP21GE, QJ71BR11, QJ71WS96 • Function version B or later is available. QJ71E71-B5, QJ71E71-B2, QJ71E71-100 •...
  • Page 38 2 SYSTEM CONFIGURATION MELSEC-Q 6 : The ERR contact of the power supply module operates differently depending on the combination of the remote I/O module function version and the base unit. The following table indicates the ERR contact operation of the power supply module. Remote I/O module Base unit Function version D or later...

  • Page 39: When Using A Multiple Cpu System

    2 SYSTEM CONFIGURATION MELSEC-Q 2.6 When Using a Multiple CPU System Take the following points into consideration when configuring a remote I/O network by utilizing multiple CPU system. Use the master module of function version B or later. Set the network parameters to the control CPU controlling the master module. It is possible to set up to four master modules per control CPU.
  • Page 40 2 SYSTEM CONFIGURATION MELSEC-Q By connecting to a remote I/O station for access to other stations, GX Developer can access stations in the other network system, whether the relay stations in the multiple CPU system are controlled by the same or different CPUs. Also, GX Developer can access either the control CPU or non-control CPU in the multiple CPU system.

  • Page 41: Checking Function Version And Serial No

    2 SYSTEM CONFIGURATION MELSEC-Q 2.7 Checking Function Version and Serial No. The following describes how to check the function version and serial No. of the network module. Checking the rating plate on the side of the module. The serial number of the module and function version number are shown in the "Serial"...

  • Page 42: Specifications

    Table 3.1 shows the performance of the optical loop system. Table 3.1 Optical loop system performance specifications Remote master station Remote I/O station Item QJ71LP21 QJ71LP21G QJ71LP21GE QJ71LP21-25 QJ71LP21S-25 QJ72LP25-25 QJ72LP25G QJ72LP25GE LX/LY 8192 points Maximum 16384 points (Remote master station...

  • Page 43: Coaxial Cable System Performance Specifications

    3 SPECIFICATIONS MELSEC-Q Remote master station Remote I/O station Item QJ71LP21 QJ71LP21G QJ71LP21GE QJ71LP21-25 QJ71LP21S-25 QJ72LP25-25 QJ72LP25G QJ72LP25GE 20.4 to 31.2 V Voltage — — Current 0.20 A — — Size of terminal M3 Screw — — External screw Suitable crimp Power R1.25-3...

  • Page 44: Optical Fiber Cable Specifications

    The optical fiber cables and connectors are dedicated parts. Optical fiber cable with connectors are sold by Mitsubishi System Service. (A catalogue of optical fiber cables is available.) Mitsubishi System Service can also provide installation. Contact your nearest representative for details.

  • Page 45: Coaxial Cable Specifications

    3.8 mm (0.15 in.) (single annealed copper wire mesh) 6.6 mm (0.26 in.) (single annealed copper wire mesh) 3C-2V connector plug 5C-2V connector plug Applicable connector plug (BNC-P-3-Ni-CAU is recommended.) (BNC-P-5-Ni-CAU is recommended.) REMARK Consult the nearest Mitsubishi representative with connector plugs. 3 - 4 3 - 4...
  • Page 46 3 SPECIFICATIONS MELSEC-Q (2) Connecting the coaxial cable connectors The following section explains how to connect the BNC connector (the connector plug for the coaxial cable) to the cable. • Solder the coaxial cable connectors properly. Insufficient soldering may result in CAUTION malfunctions.
  • Page 47 3 SPECIFICATIONS MELSEC-Q Cut the external conductor, insulating material and internal conductor to the dimensions shown below. Note that the external conductor should be cut to the same dimension as the tapered section of the clamp and smoothed down to the clamp. Insulating material Internal conductor (0.12 in.)

  • Page 48: Function Specifications

    3 SPECIFICATIONS MELSEC-Q 3.2 Function Specifications The following introduces the MELSECNET/H remote I/O network functions. The list of the functions is shown below. Basic Cyclic transmission function Communicating with input/output module · · · · · · · · · · · · · · · · · · · · · · · · Section 3.2.1 (1) functions (Periodic communication)

  • Page 49: Cyclic Transmission Function (Periodic Communication)

    3 SPECIFICATIONS MELSEC-Q 3.2.1 Cyclic transmission function (Periodic communication) The cyclic transmission function periodically exchanges data between the remote master station and remote I/O station using link device (LX/LY/LB/LW) The following explains the differences between when the module connected to the remote I/O station is an input/output module and when it is an intelligent module connected to it.

  • Page 50: Communicating With Intelligent Function Module

    3 SPECIFICATIONS MELSEC-Q (2) Communicating with intelligent function module The remote master station can communicate with the intelligent function module mounted to the remote I/O station in the following four ways. Methods for communicating with the intelligent module Features When the intelligent function module is mounted to a By cyclic transmission (common parameters) + nearby slot of the CPU module, the same kind of intelligent function module parameters...
  • Page 51 3 SPECIFICATIONS MELSEC-Q The CPU uses the X/Y(LX/LY) and B/W(LB/LW)devices set by the common parameters and the automatic refresh settings for the intelligent function module parameters that where written in the remote I/O station to periodically read and write intelligent function module data. The intelligent function module parameters are created by GX Configurator.
  • Page 52 3 SPECIFICATIONS MELSEC-Q QCPU follows the refresh parameters and refreshes link register W between QCPU and the master module. [Input/output] X/Y(LX/LY) is the same as communication with input/output module. QCPU uses the dedicated link instructions (REMFR/REMTO instructions) for directly writing to the buffer memory of the intelligent function module for the remote I/O station for reading and writing data.
  • Page 53 3 SPECIFICATIONS MELSEC-Q The CPU uses the X/Y(LX/LY) and B/W(LB/LW)devices set by the common parameters and the automatic refresh settings for the intelligent function module parameters that where written in the remote I/O station to periodically read and write intelligent function module data. The difference between this and (a) is that with the automatic refresh settings for the intelligent function module parameters, the automatic refresh destination of the intelligent function module is network module data...
  • Page 54 3 SPECIFICATIONS MELSEC-Q Link register W, follows the common parameters set in the remote master station for communication between the remote master station and the remote I/O station. Link register W between the master module and QCPU are refreshed. [Input/output] X/Y(LX/LY) is the same as communication with input/output module.

  • Page 55: Ras Functions

    3 SPECIFICATIONS MELSEC-Q 3.2.2 RAS functions RAS stands for "Reliability", "Availability" and "Serviceability" and is an automated facility for overall ease of use. (1) Output reset function for communication errors Remote I/O net will set all output of remote I/O stations to off when there is a data link error.

  • Page 56: Loopback Function (Optical Loop System)

    3 SPECIFICATIONS MELSEC-Q (3) Loopback function (optical loop system) In the optical loop system, the transmission path is dual-structured. When an error occurs in a transmission path, the faulty area is disconnected by switching the transmission path from the forward loop to the reverse loop or from the reverse loop to the forward loop, or performing a loopback.
  • Page 57 3 SPECIFICATIONS MELSEC-Q Precautions in using the optical loop system When the cable is inserted or removed, the line (forward loop/reverse loop) may be switched, but the data link will be performed normally. When the loopback is being executed due to a cable disconnection, both the forward and reverse loops may be recognized as normal depending on the condition of the cable disconnection.

  • Page 58: Station Detach Function (Coaxial Bus Systems)

    3 SPECIFICATIONS MELSEC-Q REMARK If the network module has become faulty, a loopback may not be made depending on the fault. In that case, the network may stop. Identify the faulty network module in the following method. Check the LED indications (RUN LED off, ERR. LED on) of all network modules for a faulty station.

  • Page 59: Transient Transmission Enabled Even At Cpu Module Error

    3 SPECIFICATIONS MELSEC-Q (5) Transient transmission enabled even at CPU module error By using this function, the network module can continue the transient transmission even if an error that stops the CPU module occurs while the system is operating. The description of the error of the corresponding station can be checked from other stations using GX Developer.
  • Page 60 3 SPECIFICATIONS MELSEC-Q (6) Checking the transient transmission abnormal detection time By using this function, the "Time," "Abnormal detection network number," and "Abnormal detection station number" can be checked when a transient transmission (READ, WRITE and other instructions) ends abnormally. The time log can be used to identify the network problems and to determine how the network can be improved.

  • Page 61: Diagnostic Functions

    3 SPECIFICATIONS MELSEC-Q (7) Diagnostic function The diagnostic function is used to check the network's line status and the module setting status. The diagnostic function consists mainly of following two types of tests: • Offline tests • Online tests POINT Execute the online tests when the network module is communicating (T.PASS LED is on).
  • Page 62 3 SPECIFICATIONS MELSEC-Q (8) Configuration of redundant power supply on a remote I/O station A redundant power supply can be configured on a remote I/O station by mounting a pair of power supply modules onto the dedicated base unit. A redundant power supply offers the following advantages. The remote I/O station can continue the operation after either power supply module stops power supply The remote I/O station with a redundant power supply can continue...
  • Page 63 3 SPECIFICATIONS MELSEC-Q POINT For the specifications of Q3 RB/Q6 RB Redundant power supply base unit and Q6 RP redundant power supply module, refer to QCPU Module User's Manual (Hardware Design, Maintenance and Inspection). Modules needed to configure a redundant power supply in a remote I/O station To configure a redundant power supply in a remote I/O station, use the modules shown below.
  • Page 64 Supply). Use the on-line UPS or line interactive UPS, of which voltage distortion is less than 5%. Or use the off-line UPS, Mitsubishi FREQUPS-F Series with serial No. P or later. (Example: FW-F10-0.3K/0.5K). Do not use the off-line UPS other than above.

  • Page 65: Online Module Change In A Remote I/O Station

    3 SPECIFICATIONS MELSEC-Q (9) Online module change on a remote I/O station Online module change is the function for replacing a Q series module mounted on the main base unit or extension base unit of a remote I/O station while the station is operating.
  • Page 66 3 SPECIFICATIONS MELSEC-Q GX Developer versions required for online module change on a remote I/O station To perform online module change, GX Developer Version 8.18U or later is required. In addition, online module change can also be performed from GX Developer via a network.
  • Page 67 3 SPECIFICATIONS MELSEC-Q Restrictions online module change operation The following operations cannot be performed while online module change is performed. Issue an online module change request from more than one GX Developer to a remote I/O module. Write parameters in the remote I/O module being replaced online. POINT If an online module change request is issued from other GX Developer to a remote I/O module being replaced online, the message below is displayed.
  • Page 68 3 SPECIFICATIONS MELSEC-Q If an error has occurred on the target remote I/O module, the module holds the error even after online module change is completed. Therefore, it is necessary to clear the error by clearing the error using SM50 and SD50 on the PLC CPUs of the remote I/O station and master station.
  • Page 69 3 SPECIFICATIONS MELSEC-Q Double-click the module to be replaced online to display the Online Module Change screen. (The table below indicates the communication status of the module to be replaced online when the screen below is displayed.) Target modules and items Execute/not execute Input module refreshing Execute...
  • Page 70 3 SPECIFICATIONS MELSEC-Q 11) Connect between the external device and module (I/O signal) by the switch and so on. 12) Mount the module, and then click the "Execute" button. (The table below indicates the communication status of the new module when the screen below is displayed.) Target modules and items Execute/not execute Not execute...

  • Page 71: Link Data Send/Receive Processing Time Specifications

    3 SPECIFICATIONS MELSEC-Q 3.3 Link Data Send/Receive Processing Time Specifications The following introduces the method of calculating link data send/receive and transmission delay time in the remote I/O network. 3.3.1 Link data send/receive processing (1) Summary of send/receive processing Cyclic transmission of the remote I/O network communicates by network module LX/LY/LB/LW.
  • Page 72 3 SPECIFICATIONS MELSEC-Q For intelligent function module The following provides an example of how the link device (W) on the CPU module side is sent to an intelligent function module. Data is sent to the remote master station W0. W0 data is stored in the network module refresh data storage area (LW) by link refresh.
  • Page 73 3 SPECIFICATIONS MELSEC-Q (2) Link refresh, link scan, I/O refresh and automatic refresh Link refresh of the remote master station is done in the END processing of the CPU module. Link scan is performed synchronously with the CPU module sequence scan. The I/O refresh and automatic refresh of the remote I/O station and performed "asynchronously"...

  • Page 74: Transmission Delay Time

    3 SPECIFICATIONS MELSEC-Q (4) SB/SW when a communication error station/communication stop station occurs on the network The status of whether there are any communication error/communication stop stations on the network can be checked with the link special relay/register (SB/SW). Use them as interlocks for programs. Link special relays and registers Signal status Link special...
  • Page 75 3 SPECIFICATIONS MELSEC-Q (1) Remote master station remote I/O station Cyclic transmission (X/Y/W periodic communication) Transmission delay time of X/Y/W is the sum of the following. • Remote master station scan time (Except for the link refreshing time) • Remote master station link refresh time •...
  • Page 76 3 SPECIFICATIONS MELSEC-Q [Y transmission delay time (T [Remote master station scan time (Sm) > link scan time (LS)] = (Sm + αm) + LS + T [ms] RIOR Remote station sets Y 0: 0 step to on near 0 step. E: END step αm αm...
  • Page 77 3 SPECIFICATIONS MELSEC-Q [W input transmission delay time (T [Remote master station scan time (Sm) > link scan time (LS)] = (Sm + αm) 2 + Sm + T [ms] MOV W0 D0 αm αm αm αm αm Remote master station Link scan time 0: 0 step Remote I/O station...
  • Page 78 3 SPECIFICATIONS MELSEC-Q [W output transmission delay time (T [Remote master station scan time (Sm) > link scan time (LS)] = (Sm + αm) + LS + T [ms] 0: 0 step MOV D100 W100 E: END step αm αm αm αm αm...
  • Page 79 3 SPECIFICATIONS MELSEC-Q REMFR/REMTO/READ/WRITE instructions REMFR/REMTO/READ/WRITE instructions transmission delay time is the sum of the following. • Remote master station scan time (Except for the link refreshing time) • Remote master station refresh time • Link scan time Calculate the sum as shown below: [Instruction transmission delay time (M [Remote master station scan time (Sm) >...
  • Page 80 3 SPECIFICATIONS MELSEC-Q (2) Multiplexed remote master station multiplexed remote sub- master station (a) Cyclic transmission (LB/LW/LX/LY periodic communication) The transmission delay time of B/W/Y communication is the sum of the following: • Scan times of multiplexed remote master station and multiplexed remote sub-master station (Except for the link refreshing time) •...
  • Page 81 3 SPECIFICATIONS MELSEC-Q POINT When the Secured data send/receive setting is enabled, the following formulas are used. 1) Formula for Transmission delay time (T [Multiplexed remote master station side scan time (Sm) > Link scan time (LS)] = (Sm + α m) + LS + (Ss 2 + α...
  • Page 82 3 SPECIFICATIONS MELSEC-Q (b) SEND/RECV/RECVS/READ/WRITE/REQ/ZNRD/ZNWR instruction communication The transmission delay time of instruction communication is the sum of the following: • Scan times of multiplexed remote master station and multiplexed remote sub-master station (Except for the link refreshing time) • Link refresh times of multiplexed remote master station and multiplexed remote sub-master station •...
  • Page 83 3 SPECIFICATIONS MELSEC-Q (3) Link refresh time The link refresh time (CPU module end processing time extension) is calculated as shown below. • Link device allotment points • Type of CPU used [Remote master station refresh time (αm)] α 16)} /16 + α = KM1 + KM2 {LB + LX + LY + SB + (LW 16) + (SW...
  • Page 84 3 SPECIFICATIONS MELSEC-Q (4) Link scan time Link scan time is based on a calculation of the following factors. • Link device allotment points • Number of stations connected [Link scan time] [Communication speed: 10 Mbps] LS = KB + (0.45 total number of stations) + {LX + LY + LB + (LW 16)} /8 0.001 + KR...
  • Page 85 3 SPECIFICATIONS MELSEC-Q (5) Refresh time with the remote I/O network module, input/output module and intelligent function module Refresh time with the remote I/O network module, input/output module and intelligent function module is according to the formula shown below. [Input/output module and refresh time] 0.0016 + X 0.0024 + Y 0.0014 + Y...
  • Page 86 3 SPECIFICATIONS MELSEC-Q (6) Transmission delay time formula The transmission delay time is calculated based on the following system design and conditions. (System design, conditions) CPU module:Q06HCPU Total number of remote I/O stations: 8 Number of link devices: LX = LY = 1024 points, LB = LW = 0 point, SB = SW = 512 points Remote master station CPU module scan time: 1 ms Communication speed: 10 Mbps...

  • Page 87: Switching Time From The Multiplexed Remote Master Station To The Multiplexed Remote Sub-Master Station In A Multiplexed Remote I/O Network

    3 SPECIFICATIONS MELSEC-Q Cyclic transmission delay Since Sm = 1 [ms],LS = 11.8 [ms], the Sm < LS formula is used. Input transmission delay time (T = (Sm + αm) round up [LS/(Sm + αm)] 2 + Sm + T RIOR = (1 + 0.41) [11.8/(1 + 0.41)]...

  • Page 88: Output Holding Time During System Switching In The Multiplexed Remote I/O Network For Redundant System

    3 SPECIFICATIONS MELSEC-Q 3.3.4 Output holding time during system switching in the multiplexed remote I/O network for redundant system In the multiplexed remote I/O network for redundant system, if an error occurs in the multiplexed remote master station of the control system, the multiplexed remote sub- master station of the standby system takes over the control of remote I/O stations.
  • Page 89 3 SPECIFICATIONS MELSEC-Q CPU system switching time > Switching time from the multiplexed remote master station to the multiplexed remote sub-master station A power down has occurred on the control system Scan Control system standby system CPU Standby system control system CPU Output holding time of remote I/O station [Output holding time (Toh)] Toh = Tsw + (Scan...
  • Page 90 3 SPECIFICATIONS MELSEC-Q (2) System switching when a system switching dedicated instruction is executed, a system switching request is issued by GX Developer, or the link cable is disconnected on other network module Multiplexed remote master station (DM Multiplexed remote sub-master station (DSM Control system standby system Standby system...
  • Page 91 3 SPECIFICATIONS MELSEC-Q CPU system switching time > Switching time from the multiplexed remote master station to the multiplexed remote sub- master station System switching request from GX Developer Scan Control system standby system CPU Standby system control system CPU Output holding time of remote I/O station [Output holding time (Toh)] Toh = Tsw + Scan [ms]...
  • Page 92 3 SPECIFICATIONS MELSEC-Q (3) System switching when the link cable disconnection occurs in the host network module If a communication error occurs due to link cable disconnection on the host network module, it will considerably increase "data link monitoring time + switching monitoring time".

  • Page 93: Setup And Procedures Before Starting The Operation

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION This chapter explains the procedures, settings, connections and testing that are required to start the data link operation. 4.1 Procedures Before Starting the Operation The following flowchart shows the procedures that are required to perform the data link operation: S ta rt...

  • Page 94: Network Module Names And Settings

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.2 Network Module Names and Settings 4.2.1 QJ71LP21, QJ71LP21-25, QJ71LP21G, QJ71LP21GE, QJ71BR11 (Remote master station) 2) STATION No. (factory default setting: 1): Optical loop module Station number setting switch This switch sets the station number on the same network.
  • Page 95 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 1) LED displays Name LED status Description Green on Module operating normally WDT error occurred (hardware error) Green on Operating as a remote master station Not operating as a remote master station T.PASS Green on Executing baton pass (being joined in a network)
  • Page 96 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q (1) Station No. settings on a multiplexed remote I/O network for redundant system For the network module mounted on the station (multiplexed remote master station) to which the system A connector of tracking cable is connected, set the station No.0.

  • Page 97: Qj72Lp25-25, Qj72Lp25G, Qj72Lp25Ge, Qj72Br15

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.2.2 QJ72LP25-25, QJ72LP25G, QJ72LP25GE, QJ72BR15 2) ReS-232 connector For connecting RS-232 connector for peripheral equipment 3) STATION No. (Factory setting:1) : Station setting switch 1) LED indicator Station numbers can be set inside the same network. section When there is a setting error, the "ERR"...
  • Page 98 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 1) LED displays Name LED status Description Green on Module operating normally WDT error occurred (hardware error) 2 REM. Green on Module operating normally. Green flashing Parameters being written to flash ROM or device is in test mode. In remote initialization, error (WDT error, blown fuse error, input/output verification error, etc.) T.PASS Green on...

  • Page 99: Installing And Uninstalling The Module

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.3 Installing and Uninstalling the Module (1) Installing the module Base unit Fully insert the module fixing latch into the module fixing hole in the base unit (exercise care not to allow the module fixing latch to separate from Base unit Module fixing...
  • Page 100 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q [Module handling precautions] • Since the module case is made of resin, do not drop it or subject it to strong impacts. • The module can easily be secured to the base unit using the hook located at the top of the module.

  • Page 101: Stopping The Cpu (Unintentional Output Prevention)

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.4 Stopping the CPU (Unintentional Output Prevention) Set the CPU module's RUN/STOP switch *1 to the STOP side. STOP *1: Use the RESET/STOP/RUN switch for the Q00JCPU, Q00CPU, or Q01CPU. 4.5 Checking the Input Power Supply Voltage Check that the supply power voltage to the power supply module is within the specifications.

  • Page 102: Standalone Check Of The Network Module (Offline Tests)

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.7 Standalone Check of the Network Module (Offline Tests) Before executing the data link operation, check the network module and the cables. Select a test using the mode setting switch on the front of the network module. The following three test are available for the offline tests: (1) Self-loopback test (mode setting switch: 1 or 5) This test checks the hardware of the internal circuits, including the send/receive...

  • Page 103: Self-Loopback Test

    This test checks the hardware of a standalone network module, including the send/receive circuit and cable of the transmission system. Connect the IN and OUT terminals of the QJ71LP21/QJ72LP25 network module (for the optical loop system) with an optical fiber cable.

  • Page 104: Internal Self-Loopback Test

    This test checks the hardware of a standalone network module, including the send/receive circuit of the transmission system. Do not connect the optical fiber cable with the QJ71LP21/QJ72LP25 network module (for LPthe optical loop system). However, make sure that the exterior random light does not enter from the connector.

  • Page 105: Hardware Test

    4.7.3 Hardware test This test checks the hardware inside the network module. Connect the IN and OUT terminals of the QJ71LP21/QJ72LP25 network module (for the optical loop system) with an optical fiber cable. Do not connect cables or terminal resistors if the QJ71BR11/ QJ72BR15 network module (for the coaxial bus system) is used.

  • Page 106: Cable Connections

    Maintain the bending radius of the optical fiber cable within the allowable range using a tool for securing the optical fiber cable bending radius. This tool may be purchased from Mitsubishi Electric System Service, Inc, or your nearest dealer. Please inquire for more information.
  • Page 107 Stations do not have to be connected in the order of station numbers. Remote master station is set as station number 0. a - 1) QJ71LP21-25 - QJ72LP25-25, QJ71LP21G - QJ72LP25G Remote master station Remote I/O station Remote I/O station...

  • Page 108: Coaxial Bus System

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q Removing the optical fiber cable The following shows how to remove the optical fiber cable: Start (Removal) Plug Press the fixed sections of the plug in the directions of the arrows and pull out the plug.
  • Page 109 Consider to use double-shielded coaxial cables in locations where there is excessive noise. To configure a multiplexed remote I/O network for redundant system, use a double-shielded coaxial cable. Double-shielded coaxial cable Cable close-up Mitsubishi Cable · · · 5C-2V-CCY Internal Insulator conductor Sheath External...
  • Page 110 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q (2) Cable connection Connection method Connect the coaxial cable as shown below. Always install a terminal resistor (sold separately: A6RCON-R75) to the stations connected at both ends. The F-type connector (A6RCON-F) comes with the module. Without a repeater module Remote master station Remote I/O station...
  • Page 111 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q With a repeater module (branch connection) Remote master station Remote I/O station Remote I/O station Station No. 0 Station No. 1 Station No. 2 QJ71BR11 QJ72BR15 QJ72BR15 F-type connector F-type connector F-type connector A6RCON-F A6RCON-F...
  • Page 112 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q Installing the coaxial cable The following shows how to install the coaxial cable: Link module Start (Installation) Jack Insert the plug by aligning the groove of Plug the plug with the projection of the jack. Projection Groove Rotate the plug in the direction of the...

  • Page 113: Offline Tests From Gx Developer

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.9 Offline Tests from GX Developer The offline tests check the cable connection status using the network parameters of GX Developer. 4.9.1 Forward loop/reverse loop test (Remote master station only) The forward loop/reverse loop test checks the hardware of the network modules and cables after all stations are connected with optical fiber cables.
  • Page 114 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q Setting the mode when performing the forward loop/reverse loop test on the redundant system When conducting the forward loop/reverse loop test on the redundant system, set the operation mode of the redundant CPU to the backup mode in advance.
  • Page 115 4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q (2) Starting the test Set the STOP/RUN switch of the CPU module to STOP position. When resetting the CPU module, use the RESET/L.CLR switch. Perform this operation on the station to be tested first, then on the station to execute the test.

  • Page 116: Network Diagnostics From Gx Developer (Online Tests)

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.10 Network Diagnostics from GX Developer (Online Test) With the network diagnostic function of GX Developer, the line status can easily be checked and diagnosed. Conduct network diagnostics by connecting GX Developer with a remote master station.

  • Page 117: Loop Test (Optical Loop System Only)

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.10.1 Loop test (optical loop system only) This test checks the line status of the forward and reverse loops upon completion of the wiring of the optical loop system. Also, when a loopback is being executed, it checks the station that executes the loopback.

  • Page 118: Setup Confirmation Test

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.10.2 Setup confirmation test The switch settings of the network module can be checked with this test. The following three types of items can be checked: Control station duplicate check Not performed on remote I/O network. Station number duplicate check Matching between the network number set for the station to which GX Developer is connected and the network number set with a network...

  • Page 119: Station Order Check Test (Optical Loop System Only)

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.10.3 Station order check test (optical loop system only) This test checks the connected station numbers in the optical loop system. The following connection orders can be checked by the loop status (displayed on the station order check test result screen.

  • Page 120: Communication Test

    4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION MELSEC-Q 4.10.4 Communication test This test checks whether or not data communication can normally be performed between the host and a destination station (designated with network number and station number). Especially when the destination has another network number, the relay network and station numbers are displayed.

  • Page 121: Parameter Settings

    5 PARAMETER SETTINGS MELSEC-Q 5 PARAMETER SETTINGS There is a needed use GX Developer to set the remote master station CPU module and each of the parameters in the remote I/O station network module in order to make the remote I/O network operate. In setting the parameters, it is possible to make settings from the selection of the type of MELSECNET/H to the application functions.
  • Page 122 5 PARAMETER SETTINGS MELSEC-Q (2) Parameter settings for remote I/O station Set the following functions as necessary. Required PLC Parameters · · · · Section 5.1.1 (1) PLC system settings (2) PLC RAS settings (3) Operational settings (4) I/O assignment Not required Intelligent function module parameter settings Set the following...
  • Page 123 5 PARAMETER SETTINGS MELSEC-Q Table 5.1 Remote master station network parameter setting items Network station type Reference Remote master station Parameter setting item section — Settings with the network module Section 4.3 Station number (STATION No.) Section 4.3.1 Mode (MODE) Section 4.3.2 —...
  • Page 124 5 PARAMETER SETTINGS MELSEC-Q Table 5.2 Remote I/O station PLC parameter setting items Network station type Reference Remote I/O station Parameter setting item section — PLC system settings Number of empty slots Section 5.2.1 Module synchronization settings — PLC RAS settings Section 5.2.1 Error check —...

  • Page 125: Remote Master Station Parameter Setting

    5 PARAMETER SETTINGS MELSEC-Q 5.1 Remote Master Station Parameter Setting The remote master station sets the network parameters to the CPU module. 5.1.1 Setting the number of module cards (Network type) Set the network type and the station type for each module. Up to four cards for the MELSECNET/H and up to eight cards including the Ethernet can be selected.

  • Page 126: Network Settings

    5 PARAMETER SETTINGS MELSEC-Q 5.1.2 Network settings These parameters are used to configure the MELSECNET/H network. Set the starting I/O No., network No., total number of (slave) stations, group No. and mode for each of the module model names set in the number of module cards settings. (1) Starting I/O No.

  • Page 127: (Can Be Set For Multiplexed Remote Master Station/Multiplexed Remote Sub-Master Station Only)

    5 PARAMETER SETTINGS MELSEC-Q (4) Group No. (Can be set for multiplexed remote master station/multiplexed remote sub-master station only) Set the group No. to send data simultaneously to other stations in transient transmission. Valid setting range : No group setting (default) 1 to 32 : Group No.

  • Page 128: Parameter Setting Example

    5 PARAMETER SETTINGS MELSEC-Q (6) Parameter setting example The following is an example for system parameter settings including remote master station (remote I/O network) and controlling station (PLC to PLC network). (System configuration) Remote master station Control station QCPU QJ71 QJ71 LP21 BR11...

  • Page 129: Common Parameter

    5 PARAMETER SETTINGS MELSEC-Q 5.1.3 Common parameter The common parameters set the LB, LW, LX and LY cyclic transmission range that allows sending and receiving between remote master stations and remote I/O stations in a network. Common parameter settings only need to be set for the remote master station. (1) LX/LY settings LX sets the remote master station (X) addresses the input the signals (X) and sets which of the intelligent function module input reads to.
  • Page 130 5 PARAMETER SETTINGS MELSEC-Q POINT (1) Set the setting for the remote master station side to the input/output number of the remote I/O station module that is mounted. Remote master station Remote I/O station Actual I/O 1FFF 1FFF If there is an error in the mounting condition, malfunctioning will occur. Remote master station Remote I/O station Actual I/O...

  • Page 131: Lb/Lw Setting

    I/O module link register W by intelligent parameters, the remote master station can read and write intelligent function module buffer memory data from the remote I/O module via LW. Remote master station Remote I/O station (Station No. 1) QJ71LP21 QJ72LP25 intelligent QCPU QJ71BR11...

  • Page 132: Reserved Station Designation

    5 PARAMETER SETTINGS MELSEC-Q POINT (1) Set so that the M station R station and M station R station do not overlap. Good example Bad example M station R station M station R station M station M station R station R station (2) When the MELSECNET/H remote I/O network uses the link dedicated instructions (REMFR, REMTO, READ, WRITE), there is no need for LB/LW for...
  • Page 133 5 PARAMETER SETTINGS MELSEC-Q POINT In the case of the multiplexed remote I/O network for redundant system, set the link devices in the tracking settings in the redundant parameters to update the link devices between the multiplexed remote master station and multiplexed remote sub-master station.

  • Page 134: Supplemental Settings

    5 PARAMETER SETTINGS MELSEC-Q 5.1.4 Supplemental settings The supplemental settings are included in common parameter settings to provide more precise usage. Keep the default settings for normal use. Common parameters supplemental are only for remote master stations. [Setting items] Constant scan The constant scan function is used to maintain the link scan time constant.
  • Page 135 5 PARAMETER SETTINGS MELSEC-Q With multiplex transmission (see Section 7.4) Set this item when executing the multiplex transmission function. The multiplex transmission function is used when both the forward and reverse loops are in the normal status to speed up the transmission rate using both loops at the same time.

  • Page 136: Network Refresh Parameters

    5 PARAMETER SETTINGS MELSEC-Q 5.1.5 Network refresh parameters The refresh parameters are used to transfer the link device data (LB, LW, LX, LY) of the network link module to the devices (X, Y, M, L, T, B, C, ST, D, W, R, ZR) of the CPU module for operation of the sequence programs.
  • Page 137 5 PARAMETER SETTINGS MELSEC-Q (Refresh parameter setting screen) POINT This check function only checks MELSECNET/H network parameters. Assignment method Select the device range input method from either Points/Start or Start/End. • Default: Start/End Transient transmission error history status Select whether to overwrite or hold the error history. •...
  • Page 138 5 PARAMETER SETTINGS MELSEC-Q POINT Either of the following settings must be made to use the entire device range (16k points) of LB/LW. Change the number of B/W device points. (Refer to the following example.) Make the refresh parameter settings so that B/W and other devices will be assigned as the refresh destination devices of LB/LW.
  • Page 139 5 PARAMETER SETTINGS MELSEC-Q (1) Concept of the network refreshing (a) Network refresh ranges The devices that fall into both the range of all the stations set with the common parameters ("start address to end address" of 1R1 to 1R3) and the ranges set with the refresh parameters are refreshed.
  • Page 140 5 PARAMETER SETTINGS MELSEC-Q (2) How to set the refresh parameters (a) Automatic setting with the Default button The refresh parameters can be set as follows based on the number of installed modules and the installation locations using the Default button. Installation location Module 1...
  • Page 141 5 PARAMETER SETTINGS MELSEC-Q POINT LX/LY cannot be automatically set with the Default button. (b) Setting method When using the assignment method of Start/End, set the start and end addresses of the network module and the start address of the PLC side. Master module CPU module 2048 points...
  • Page 142 5 PARAMETER SETTINGS MELSEC-Q (3) Setting example The following shows an example of the refresh parameters settings: [System configuration] QCPU QJ71 QJ71 LP21 BR11 Network No.2 Network No.1 [Parameter assignments] CPU module Master module (1M Master module (2M 0 to 7F 0 to 7F 100 to 17F 100 to 17F...
  • Page 143 5 PARAMETER SETTINGS MELSEC-Q [Setting screen] The following shows the settings of the refresh parameters for each module that are displayed on the screen. Settings of module 1 (1M ) (transfer SB, transfer SW, transfers 1 to 6) (Transfers 7 to 8) Settings of module 2 (2M ) (transfer SB, transfer SW, transfers 1 and 2) 5 - 23...

  • Page 144: Valid Module During Other Station Access

    5 PARAMETER SETTINGS MELSEC-Q 5.1.6 Valid Module During Other Station Access This parameter is used to specify any of the following modules to be relayed when a data communication request for which the network No. of the access target PLC station cannot be specified from the host (access from the QJ71C24 (A compatible 1C frame), QJ71E71 (A compatible 1E frame), etc.

  • Page 145: Redundant Settings

    5 PARAMETER SETTINGS MELSEC-Q 5.1.7 Redundant settings For the multiplexed remote master station for redundant system, it is necessary to set the same mode as the mode applied to the multiplexed remote master station (system A) to the multiplexed remote sub-master station (system B). Set the mode of system B in the redundant settings.

  • Page 146: Remote I/O Station Parameter Settings

    5 PARAMETER SETTINGS MELSEC-Q 5.2 Remote I/O Station Parameter Settings For remote I/O stations, set up the PLC parameters, network parameters, and remote password on the remote I/O module as needed. POINT After writing the parameters to the remote I/O module, reset it to enable the parameters that have been set.
  • Page 147 5 PARAMETER SETTINGS MELSEC-Q 1: The operation mode of a remote I/O station under the error status can be set differently from the parameters of the remote master station (CPU module). When an error (fuse blowout or I/O verification error) occurs on the remote master station (CPU module) and remote I/O station, the data link and output of the remote I/O station are determined based on the combination of the parameter settings of remote I/O stations and remote master station (CPU...
  • Page 148 5 PARAMETER SETTINGS MELSEC-Q Operational settings Remote I/O switch settings For future expansion. Cannot be set at present time. Assignment method Select the allocation method for sending parameters between devices: "Points/Start" or "Start/End". • Bit devices (B,M) have number of points in units of 16 and the Start/End address is allocated in multiple units of 16.
  • Page 149 5 PARAMETER SETTINGS MELSEC-Q POINT When the intelligent function module buffer memory is located in several different areas, the forwarding parameter between devices are convenient when you wish to combine them for access. Intelligent function Master module CPU module Remote I/O module module Buffer Buffer...
  • Page 150 5 PARAMETER SETTINGS MELSEC-Q (2) Network parameters The remote I/O module can set network parameters in the same way as the CPU module. Major Items Description Ethernet settings Sets the Ethernet network parameters. CC-Link settings Sets the CC-Link settings network parameters. For details on Ethernet settings, refer to "Q Corresponding Ethernet Interface User's Manual (Basic) (SH-080009).

  • Page 151: Programming

    6 PROGRAMMING MELSEC-Q 6 PROGRAMMING When diverting the program example introduced in this chapter to the actual system, fully check that there are no problems in the controllability of the system. 6.1 Programming Precautions This section explains the precautions in creating programs using data on the network. 6.1.1 Interlock related signals A list of the interlock signal devices used in the sequence programs is provided below.
  • Page 152 6 PROGRAMMING MELSEC-Q List of Interlock Devices Use permitted/prohibited Remote Control Normal Remote I/O Name Description master station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the network module status. SB0020 Module status Off: Normal (32) On: Abnormal When PLC to PLC network Indicates the station type set with the parameter of the host's...
  • Page 153 6 PROGRAMMING MELSEC-Q Use permitted/prohibited Remote Control Normal Remote I/O Name Description master station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the cyclic transmission status of each station (including the host). 0: Executing cyclic transmission (including the station with the maximum station number and smaller number as well as SW0074 reserved stations)

  • Page 154: Program Example

    6 PROGRAMMING MELSEC-Q 6.1.2 Program example Interlocks should be applied to the programs according to the link status of the host and other stations. The following example shows an interlock in the communication program that uses the link status of the host (SB47, SB49) and the link status of station number 2 (bit 1 of SW70 and bit 1 of SW74).
  • Page 155 6 PROGRAMMING MELSEC-Q If the initial settings for the buffer memory of the intelligent function module on a remote I/O station are set by a dedicated link command (REMTO instruction), write the program so that when only that remote I/O module is reset (by turning the remote I/O module power supply off or by using the remote I/O module reset switch), the remote master station will detect that condition and will once again execute the initial settings in the intelligent function module.

  • Page 156: Cyclic Transmission

    6 PROGRAMMING MELSEC-Q 6.2 Cyclic Transmission The link scan of the remote I/O network and the sequence scan of the CPU module operate synchronously. Depending on the timing of the link refresh, link data with data types of more than 32 bits (two words), such as the ones below, may be broken up into new and old data, which may coexist in 16-bit (one word) units.

  • Page 157: Block Guarantee Of Cyclic Data Per Station

    6 PROGRAMMING MELSEC-Q 6.2.2 Block guarantee of cyclic data per station By enabling the parameter settings shown below, handshaking for the cyclic data is performed between the CPU and the network module and then the network is refreshed. Through the cyclic data handshaking, the link data block is guaranteed for each station (to prevent link data separation per station As shown below, set the send and receive parameters as needed.

  • Page 158: Communication Between Input/Output Module And Intelligent Function Module

    6 PROGRAMMING MELSEC-Q 6.3 Communication Between Input/Output Module and Intelligent Function Module This section introduces the settings that are required to allow the CPU module to communicate with the remote I/O station input/output module and the intelligent function module using cyclic transmission. The following example is used to explain this configuration.
  • Page 159 6 PROGRAMMING MELSEC-Q CPU module: Refresh parameters Sets the input/output range for refreshing between the CPU module and master module. Remote I/O module: Intelligent parameter (Initial settings) Set so that channel 1 is sampling process, channel 2 is 50 times of average processing, channel 3 is 100 ms of average processing.
  • Page 160 6 PROGRAMMING MELSEC-Q Remote I/O module: Intelligent parameters (Automatic refresh) Sets the digital output vale for channels 1 to 3 and the device for refreshing the error code. 2 : Note that the number of intelligent function module parameters that may be set for automatic refresh setting is limited.
  • Page 161 6 PROGRAMMING MELSEC-Q (Program example) Program for communicating with input/output module QX40,QY40P The sequence program uses input (X100 to X10F) and output (Y110 to Y11F) to handle remote I/O station (station No. 1) QX40 input and QY40P output. Input from remote I/ O station X0 Output to remote I/ O station Y10 Program for communicating with intelligent function module Q64AD The 64AD digital value can be read out by W0 to W3 by the automatic refresh...

  • Page 162: Dedicated Link Instruction List

    6 PROGRAMMING MELSEC-Q 6.4 Dedicated Link Instruction List The following table outlines the instructions that can be used for the MELSECNET/H. For details on the format and program examples of each instruction, see the applicable section listed in the Reference section column. List of dedicated link instructions : Can be used : Cannot be used...
  • Page 163 6 PROGRAMMING MELSEC-Q Execution Target station station Reference Multiplexed Multiplexed Name Description Instruction QnPH QnPRH section remote remote sub- master master station station SEND: Writes data to the target station (network module) of the target network No. RECV: Reads the data sent by SEND to the CPU device. Data SEND send...
  • Page 164 6 PROGRAMMING MELSEC-Q Execution Target station station Reference Multiplexed Multiplexed Name Description Instruction QnPH QnPRH remote remote sub- section master master station station [A-compatible instruction] Reads the CPU device data of the target station of the target network Other Network module Network module station Word device Channel 1...
  • Page 165 6 PROGRAMMING MELSEC-Q Execution Target station station Reference Multiplexed Multiplexed Name Description Instruction QnPH QnPRH remote remote sub- section master master station station "Write clock data" to the CPU module of other station. Network module Network module Write Channel 1 clock Channel 2 Channel 3...

  • Page 166: Using The Link Special Relays (Sb)/ Link Special Registers (Sw)

    6 PROGRAMMING MELSEC-Q 6.5 Using the Link Special Relays (SB)/ Link Special Registers (SW) The data linking information is stored in the link special relays (SB)/registers (SW). They can be used by the sequence programs, or used for investigating faulty areas and the causes of errors by monitoring them.

  • Page 167: Application Functions

    7 APPLICATION FUNCTIONS MELSEC-Q 7 APPLICATION FUNCTIONS When applying the program examples introduced in this chapter to the actual system, make sure to examine the applicability and confirm that it will not cause system control problems. Chapter 3 Basic Cyclic transmission function Communicating with input/output module ·...

  • Page 168: Transient Transmission Function (Non-Periodical Communication)

    7 APPLICATION FUNCTIONS MELSEC-Q 7.1 Transient Transmission Function (Non-Periodical Communication) The transient transmission function performs data communication only when it is requested between stations. The transient transmission function can be requested with the dedicated link instructions (REMFR, REMTO, READ and WRITE) GX Developer, the intelligent function module, etc.

  • Page 169: Dedicated Link Instruction

    7 APPLICATION FUNCTIONS MELSEC-Q 7.1.1 Dedicated link instruction (1) Reading/writing remote I/O station intelligent function module buffer memory (REMFR/REMTO) The following describes the REMFR/REMTO instruction format and provides example programs. The REMFR instruction reads the data from the buffer memory of the intelligent function module mounted to the remote I/O station.
  • Page 170 7 APPLICATION FUNCTIONS MELSEC-Q REMTO instruction (Network No. designation) Write command Z: Executed when on Z.REMTO "Jn" Write command ZP: Executed when rising ZP.REMTO "Jn" Description of setting Setting range Object network No. 1 to 239 (n1) Channel number 1 to 8 (n2) Object number 1 to 64...
  • Page 171 7 APPLICATION FUNCTIONS MELSEC-Q Instruction execution timing Normal completion (REMFR instruction) REMTO Sequence scan Write command Write completion device (Device designated in D5) 1 scan Host CPU Write completion device (D5 + 1 device) Set data (Devices designated in D1, D2, D4) Write data storage device (Device...
  • Page 172 7 APPLICATION FUNCTIONS MELSEC-Q (REMTO instruction) REMTO Sequence scan Write command Write completion device (Device designated in D5) 1 scan Host CPU Write completion device (D5 + 1 device) Set data (Devices designated in D1, D2, D4) Write data storage device (Device W (M designated in D3)
  • Page 173 7 APPLICATION FUNCTIONS MELSEC-Q Abnormal completion (REMFR instruction) REMFR Sequence scan Read command Read completion device (Device designated in D5) Host CPU Read completion device (D5 + 1 device) 1 scan Set data (Devices designated in D1, D2, D4) Error code storage Error code device (SW31) Master module...
  • Page 174 7 APPLICATION FUNCTIONS MELSEC-Q (REMTO instruction) REMTO Sequence scan Write command Write completion device (Device designated in D5) Write completion Host CPU device (D5 + 1 device) 1 scan Set data (Devices designated in D1, D2, D4) Write data storage device (Device Error code W (M...
  • Page 175 7 APPLICATION FUNCTIONS MELSEC-Q Program example The following shows an example of a REMFR/REMTO instruction on the following system design. It is a program for accessing the buffer memory of Q62DA and Q64AD mounted to a remote I/O station. System design Remote I/O station (Station number 0) QJ71 QX40...
  • Page 176 7 APPLICATION FUNCTIONS MELSEC-Q Initial data read Initial process request Module READY Operating conditions set request Operating Module Operating Operating conditions conditions READY conditions set request set request set completed Setting analog output permit Analog CH1, output output permit/ permit prohibit request CH2, output...
  • Page 177 7 APPLICATION FUNCTIONS MELSEC-Q Q64AD Communication program for Q64AD Host baton 1 msec pass status timer Host data 1 msec link status timer Station No.1 baton 1 msec pass status timer 1 msec Station No. 1 timer cyclic transmission status Station No.
  • Page 178 7 APPLICATION FUNCTIONS MELSEC-Q Digital output value read processing Read Module A/D conversion request READY completion flag Error code read and reset process Error Error Read reset generating completion request flag flag Read Error completion clear flag request Error Error Error clear clear...

  • Page 179: Remote I/O Station System Monitor

    7 APPLICATION FUNCTIONS MELSEC-Q 7.2 Remote I/O Station System Monitor It is possible to Remote I/O network can monitor the intelligent function module mounted to the remote I/O station system using GX Developer. By using this, it is possible to easily diagnose the intelligent function module on the remote I/O station.

  • Page 180: Device Test For Remote I/O Station

    7 APPLICATION FUNCTIONS MELSEC-Q 7.3 Device Test for Remote I/O Station The remote I/O network can use operations of GX Developer connected to the remote I/O station to test the input/output devices of the sequence program without affecting the online system. To conduct a test without affecting the system, register the device to be tested in "Forced input output registration/cancellation"...
  • Page 181 7 APPLICATION FUNCTIONS MELSEC-Q (2) The remote I/O module stops the X input from the input module At this time, the remote I/O station is performing X/Y communication with the remote master station. The remote master station uses the GX Developer which is connected directly to the remote I/O module to perform make an X input from the GX Developer to the remote I/O station and perform an X input test.

  • Page 182: Multiplex Transmission Function (Optical Loop System)

    7 APPLICATION FUNCTIONS MELSEC-Q 7.4 Multiplex Transmission Function (Optical Loop System) Master Remote The multiplex transmission function allows high-speed communications using duplex transmission paths (both the forward and reverse loops) in the optical loop system. In order to execute the multiplex transmission function, setting for the "Supplemental settings"...

  • Page 183: Return Sequence Station Number Setting Function

    7 APPLICATION FUNCTIONS MELSEC-Q 7.5 Return Sequence Station Number Setting Function Master Remote The remote I/O net can set the number of stations for which stations with communication errors during one link scan can perform return sequence. If the number of stations set is large, a large number of communication stations with errors can perform return sequence.

  • Page 184: Interrupt Settings

    7 APPLICATION FUNCTIONS MELSEC-Q 7.7 Interrupt Settings Master Remote The remote master station uses the host interrupt setting parameters to check interrupt conditions at the time data is being received from the remote I/O station. When the interrupt conditions are matched, it issues an interrupt request to CPU module from the master module and starts the interrupt sequence program of the CPU module.

  • Page 185: I/O Assignment Function

    7 APPLICATION FUNCTIONS MELSEC-Q 7.8 I/O Assignment Function Master Remote The I/O assignment function is a convenient function for use under situations such as the following: (1) when changing the I/O response time of the input module, (2) when changing the error time output mode of the output module and (3) when setting the setting switches for the intelligent function module.

  • Page 186: Stopping/Restarting The Cyclic Transmission And Stopping Link Refreshing (Network Test)

    7 APPLICATION FUNCTIONS MELSEC-Q 7.9 Stopping/Restarting the Cyclic Transmission and Stopping Link Refreshing (Network Test) The remote I/O network can use the "network test" of the GX Developer to stop and restart cyclic data. This function is useful when other station's data should not be received or when the host's data should not be sent at system startup (when debugging), etc.

  • Page 187: Multiplexed Remote Master Function (Qnphcpu Only)

    7 APPLICATION FUNCTIONS MELSEC-Q 7.10 Multiplexed remote master function (QnPHCPU only) Multiplex remote master function allows the multiplexed remote sub-master station to take control of the remote I/O stations when the multiplexed remote master station fails. To make this function valid, include the master station (multiplexed remote master station (DM )) and a sub-master station (multiplexed remote sub-master station (DSM...
  • Page 188 7 APPLICATION FUNCTIONS MELSEC-Q The following describes each item. (1) Continuation of controlling remote I/O stations when multiplexed remote master station fails By mounting the network modules of the multiplexed remote master station and multiplexed remote sub-master station to different PLC CPUs, the multiplexed remote sub-master station automatically controls the remote I/O stations if the multiplexed remote master station fails (switching of master operation).
  • Page 189 7 APPLICATION FUNCTIONS MELSEC-Q The intelligent function modules such as QJ71C24, QJ71E71 which are mounted to the remote I/O stations can access the station that is currently performing master operation in the MELSEC communication protocol. Access Destination Target Station Number to Be Set Multiplexed remote master station (Station No.
  • Page 190 7 APPLICATION FUNCTIONS MELSEC-Q Select the multiplexed remote master station or multiplexed remote sub- master station from "Network type" on the "Module count setting screen" of the GX Developer parameters. • Multiplexed remote master station: • Multiplexed remote sub-master station: Since the multiplexed remote master station needs to recognize the station number of the multiplexed remote sub-master station, set the station number of the multiplexed remote sub-master station on the network range...
  • Page 191 7 APPLICATION FUNCTIONS MELSEC-Q (2) Selection of operating station status when multiplexed remote master station returns to system It is possible to set the parameter of the multiplexed remote master station to select whether the remote I/O stations will be controlled by the multiplexed remote master station or by the multiplexed remote sub-master station when the multiplexed remote master station returns to system while the remote I/O stations are being controlled by the multiplexed remote sub-master station.
  • Page 192 7 APPLICATION FUNCTIONS MELSEC-Q Return to system as standby station: The multiplexed remote master station returns to the system as the sub- master operating station (standby station). The multiplexed remote sub-master station continues the control of the remote I/O stations. Multiplexed remote Multiplexed remote master station...
  • Page 193 7 APPLICATION FUNCTIONS MELSEC-Q Switching of multiplexed remote master station operation When the multiplexed remote master station has returned to system, it can be switched to master operation in the following procedure. The multiplexed remote sub-master confirms that the multiplexed remote master station has returned to the system by checking the link special relay SB status.
  • Page 194 7 APPLICATION FUNCTIONS MELSEC-Q Link special relays used to switch multiplexed remote sub-master station operation Number Name Description SB0014 Remote sub-master station switching Forcibly directs the remote sub-master station that is performing command master operation to shift to sub-master operation. (invalid for redundant systems) OFF : Without directive ON : With directive...
  • Page 195 7 APPLICATION FUNCTIONS MELSEC-Q (3) Startup of multiplexed remote sub-master station only By setting the same parameters as the multiplexed remote master station, the multiplexed remote sub-master station continues the control of the remote I/O stations if it is powered on and then off while controlling the remote I/O stations. However, the outputs of the remote I/O stations are cleared when the multiplexed remote sub-master stations resumes the controls.
  • Page 196 7 APPLICATION FUNCTIONS MELSEC-Q (4) Communication among multiplexed remote master station, multiplexed remote sub-master station and remote I/O stations The input (X) data of the remote I/O station and the link relay (B) and link register (W) data sent by the remote I/O station are transferred to both the multiplexed remote master station and multiplexed remote sub-master station.
  • Page 197 7 APPLICATION FUNCTIONS MELSEC-Q • LB/LW data flow between stations Multiplexed remote master station Multiplexed remote sub-master station (master operation) (sub-master operation) LB/LW LB/LW (c) Data transfer (c) Data transfer 1FFF 1FFF LB/LW 1FFF Remote I/O station Multiplexed remote master station fails Multiplexed remote sub-master station Multiplexed remote master station (master operation)
  • Page 198 7 APPLICATION FUNCTIONS MELSEC-Q (6) Program example to transfer data between multiplexed remote master station and multiplexed remote sub-master station The following program example assumes that the same program is used on the multiplexed remote master station and multiplexed remote sub-master station to transfer data between the multiplexed remote master station and multiplexed remote sub-master station.
  • Page 199 7 APPLICATION FUNCTIONS MELSEC-Q Link special relay and link special registers used to make the programs identical The following link special relay and link special registers can be used to check the send/receive device ranges of the multiplexed remote master station and multiplexed remote sub-master station.
  • Page 200 7 APPLICATION FUNCTIONS MELSEC-Q Program example: For multiplexed remote master station Host baton pass status Host data link status Module status SB75 for multi R sub-master R sub-master cyclic transmission Send LB device No. Receive LB device No. Send LW device No.
  • Page 201 7 APPLICATION FUNCTIONS MELSEC-Q R master cyclic trans control Continuation processing program used when multiplexed remote master station fails Station 2 baton path status Station 2 cyclic transmission Program for communication with remote I/O station No. 2 In the timer constant K , set the following value. Baton path status (Sequence scan time 4) or more...
  • Page 202 7 APPLICATION FUNCTIONS MELSEC-Q 7.11 Multiplexed remote master function for the redundant system (QnPRHCPU only) The redundant system uses the multiplexed remote master function to control I/O modules and intelligent function modules. The multiplexed remote master function for the redundant system continues the control of remote I/O stations when the multiplexed remote master station (control system) fails by switching the multiplexed remote master station from the control system to the standby system and switching the multiplexed remote sub-master station (standby...

  • Page 203: Backup Function Of Master Operation On System Switching Between Control System And Standby System

    7 APPLICATION FUNCTIONS MELSEC-Q 7.11.1 Backup function of master operation on system switching between control system and standby system The redundant system consists of a control system (multiplexed remote master station) and standby system (multiplexed remote sub-master station) of the same system configuration. If a power supply error or CPU error occurs in the control system, the QnPRHCPU of the standby system switches to the control system to continue the operation of the redundant system.

  • Page 204: Master Operation By The Station That Has Started Up As The Control System

    7 APPLICATION FUNCTIONS MELSEC-Q The output of the remote I/O station is held while master operation is switched from the multiplexed remote master station to the multiplexed remote sub-master station. Multiplexed remote master station Multiplexed remote sub-master station Output is held during system switching. Remote I/O station Remote I/O station Remote I/O station If the multiplexed remote master station returns to the normal status while the multiplexed remote sub-master station controls remote I/O stations, the...

  • Page 205: System Switching Request Function Of Control System

    7 APPLICATION FUNCTIONS MELSEC-Q 7.11.3 System switching request function of control system The control system includes the system switching request function, i.e., the network module mounted in the control system issues the system switching request to the QnPRHCPU when it detects the data link error such as link cable disconnection or communication error.
  • Page 206 7 APPLICATION FUNCTIONS MELSEC-Q The network module issues a system switching request when the status of data link is changed from "under data link" to "data link halted." (when the D.LINK LED of the network module turns off.) Although the time interval from when the data link is stopped to when the system switching request is issued to the QnPRHCPU is set to two seconds, the interval can be changed using the link special relay SB and link special register SW.
  • Page 207 7 APPLICATION FUNCTIONS MELSEC-Q 7.11.4 Access function by specifying the control system or standby system This function is for making access to the QnPRHCPU by specifying the control system or standby system using GX Devloper or other method. By using this function, access to the control system is enabled even after system switching occurs due to error.

  • Page 208: Remote Password

    7 APPLICATION FUNCTIONS MELSEC-Q 7.12 Remote password The remote password function is the function for preventing a remote user from illegally connecting to a remote I/O module and PLC CPU. The remote password function can be used by setting a remote password for a remote I/O module.
  • Page 209 7 APPLICATION FUNCTIONS MELSEC-Q Unlocking and locking the remote password The remote password is unlocked (connection is allowed) via the modem by the serial communication module or via Ethernet by the Ethernet module. When the remote password is matched, connection to the remote I/O module is allowed.
  • Page 210 7 APPLICATION FUNCTIONS MELSEC-Q Setting procedure of remote password "GX Developer" "Remote Password" "Remote Password Setting" screen "Remote Password Details Setting" screen Setting screen Set a remote password Detailed setting is necessary for QJ71E71. Setting items Item Setting Setting range/option Password settings Enter a remote password 4 characters, ASCII code...
  • Page 211 7 APPLICATION FUNCTIONS MELSEC-Q Error codes detected by remote I/O module Error code Error message LED status Description Measures 3400 REMOTE ERR. LED: The remote password file includes Correct the starting I/O of the target PASS. ERR. incorrect settings. module within 0000 to 0FE0 of the •...

  • Page 212: Troubleshooting

    8 TROUBLESHOOTING MELSEC-Q 8 TROUBLESHOOTING In order to ensure high system reliability, it is important to take precautions before the system is operated and to quickly and effectively correct problems if they do occur. This is why it is important to perform off-line testing of the network and checking of the cables when first starting the system.

  • Page 213: Network Diagnostics (Network Monitor)

    8 TROUBLESHOOTING MELSEC-Q 8.1 Network Diagnostics (Network Monitor) The status of the remote can be checked using the network diagnostic function of GX Developer. When an error occurs, the faulty station can be identified using the host information, other station information, and error history monitor functions of the network. GX Developer network diagnosis can be implemented for the remote master station and remote I/O station 1: Use GX Developer Version 6.01B or later when executing network diagnosis from...
  • Page 214 8 TROUBLESHOOTING MELSEC-Q From previous page [Status of self] • Parameter settings • Reserved station setting • Transmission mode • Duplex transmission setting • Duplex transmission status Error history monitor [Network information] • Network Type • Module No. • Network No. •...

  • Page 215: Host Information

    8 TROUBLESHOOTING MELSEC-Q 8.1.1 Host information With the host information, the information of the entire network of the connection destination and the status of the host can be checked. [Network info.] Network type (SB0040, SB0044, SB0057, SW0046) Displays the network type of the host. •...
  • Page 216 8 TROUBLESHOOTING MELSEC-Q [Link information] Mode (SW0043) Displays the operation mode of the host. • Online • Offline (debug mode) • Offline • Forward loop test • Reverse loop test • Station-to-station test (Station that executes tests) • Station-to-station test (Station to be tested) F loop status (SB0091), Loopback station (SB0099) Displays the status of the forward loop side.

  • Page 217: Other Station Information

    8 TROUBLESHOOTING MELSEC-Q 8.1.2 Other station information With the other station information, the status of the communication, data link, parameters, CPU, loop and reserved station status of each station can be checked. The buttons 3) and 7) can be selected only when diagnosis is executed from the remote master station.
  • Page 218 8 TROUBLESHOOTING MELSEC-Q Data-Link status of each station (SW0074 to 77) Displays the status of the cyclic transmission. • Normal display : Normal station or reserved station • Highlighted display : Abnormal station (data link not executed) Parameter status of each station Displays the parameter communication status of each station (SW0078 to 7B).

  • Page 219: Network Monitor Details

    8 TROUBLESHOOTING MELSEC-Q 8.1.3 Network monitor details The remote master station information, data link information and parameter status of the host station can be confirmed. Displayed as shown below when diagnosis is executed from the remote I/O station. [Network info.] This area displays the same information as the host information in Section 8.1.1.
  • Page 220 8 TROUBLESHOOTING MELSEC-Q [Data link information] Total number of link stations Displays the total number of the link stations set with the parameter plus one (for the remote master station). Station of maximum normal transmission (SW005A) Displays the highest station number that is executing the baton pass normally (the status where the transient transmission is possible).
  • Page 221 8 TROUBLESHOOTING MELSEC-Q 10) Reason for transmission stop (SW0049) Displays the causes why the host's data linking (cyclic transmission) was disabled. Indication Description Normal Communications being executed normally Cyclic transmission to all stations is stopped There is a stop instruction (All) from the host or other station.

  • Page 222: Error History Monitor

    8 TROUBLESHOOTING MELSEC-Q 8.1.4 Error history monitor With the error history monitor information, the status of the forward/reverse loop errors, communication errors, and transient transmission errors that have occurred can be checked. In addition, the detailed error history display and the error history can be cleared on this screen.

  • Page 223: Troubleshooting

    8 TROUBLESHOOTING MELSEC-Q UNDER (SW00B8, SW00C0) Displays how many UNDER errors have occurred. <Error Cause> Power-ON/OFF of the adjacent station, faulty cable, etc. <Corrective Action> See the following POINT. CRC (SW00B9, SW00C1) Displays how many CRC errors have occurred. <Error Cause> Isolation of the sending station, faulty cable, hardware failure, noise, etc.
  • Page 224 8 TROUBLESHOOTING MELSEC-Q (2) Error history monitor details Displays the causes of loop switches and the history of the transient transmission errors. [Loop switching] Requested by (SW00E0 to E7) Displays the number of the station (not necessarily an adjacent station) that requested the loop switch and loopback.
  • Page 225 8 TROUBLESHOOTING MELSEC-Q 8.2 Troubleshooting Check the PLC CPU for an error before starting the troubleshooting of the network module and network. If the RUN LED of the PLC CPU is off/flickering or the ERR. LED is on, identify the error that occurred in the PLC CPU, and take corrective action.
  • Page 226 8 TROUBLESHOOTING MELSEC-Q For the remote I/O module Start Host "T.PASS" LED on? Host baton bus is normal Host normal status "RUN" LED on? Is power being supplied to the power supply module? "ERR" LED on? Implement offline tests (1) Hardware test (2) Self-loopback test (3) Internal self-loopback test "REM."...
  • Page 227 8 TROUBLESHOOTING MELSEC-Q (2) From monitoring the network status to troubleshooting of a faulty station The following flowchart illustrates the procedure for monitoring the status of the entire network, detecting a faulty station, and then performing troubleshooting for the applicable station. The status of the entire network is monitored with GX Developer.
  • Page 228 8 TROUBLESHOOTING MELSEC-Q Check the baton pass status of the applicable station with GX Developer's network monitor. Are all the stations executing the baton pass normally? Communication is normal. Check the stations that are not executing the baton pass. Is the "RUN" LED of the applicable station lit? Is the PLC...
  • Page 229 8 TROUBLESHOOTING MELSEC-Q Is the send and receive data within the system specifications? Is the send/ receive data according to system specifications? Value 0: The host Value of SW47 transmitting normally <Troubleshooting> Value 3: No host send area Normal communication Checks the contents of each Value 4: Abnormal parameters detected parameter that has been set...
  • Page 230 8 TROUBLESHOOTING MELSEC-Q <Cause 1> M/S error or SW error is assumed. <Troubleshooting 1> 1) Check for duplicate station number, remote master station duplication or switch setting error. 2) Take corrective action according to the contents of SW47 and the error code stored in SW48.

  • Page 231: Items To Be Checked First

    8 TROUBLESHOOTING MELSEC-Q 8.2.1 Items to be checked first Check item Checking procedure Monitor the transmission status of each station Check the CPU module status of the faulty station, the status of the network modules, with GX Developer 's network monitor. the loop status of each station to search for the location where the error occurred.

  • Page 232: When Data Link Is Disabled Because Of Reset Or Power Off Of Each Station

    8 TROUBLESHOOTING MELSEC-Q 8.2.3 When data link is disabled because of reset or power off of each station Check item Checking procedure Check the wiring status with GX Developer's network diagnostic loop test. Is the cable wired properly? (See Section 4.10.1.) Check the status of each station to see whether the entire system is faulty or a specific- Are the cables disconnected? station is faulty, and locate the faulty area.

  • Page 233: When The Transmission And Reception Data Are Abnormal

    8 TROUBLESHOOTING MELSEC-Q 8.2.5 When the transmission and reception data are abnormal (1) The cyclic transmission data is abnormal Check item Checking procedure Stop the CPU modules of both the remote master station and turn the link device of the sending station on and off by GX Developer's test operation to check whether or not data is sent to the receiving station.

  • Page 234: When A Multiplexed Remote I/O Network For The Redundant System Does Not Operate Normally

    8 TROUBLESHOOTING MELSEC-Q 8.2.7 When a multiplexed remote I/O network for the redundant system does not operate normally (1) QnPRHCPU will not perform system switching even when the data link cable is disconnected. Check item Checking procedure Isn’t the power supply module of the standby Confirm the status of the external power supply of the standby system.
  • Page 235 8 TROUBLESHOOTING MELSEC-Q 8.2.8 Checking for incorrect fiber-optic cable connection during online This section explains the checking procedure for incorrect fiber-optic cable connection (IN-IN, OUT-OUT) during online and the link special registers (SW009C to SW009F) used for the check. Unlike the loop test, the checking procedure given in this section allows a check without stopping a data link.
  • Page 236 Station No.0 (connected IN-IN with Station No.1 and OUT-OUT with Station No.4). Station No. 0 Station No. 1 Station No. 2 Station No. 3 Station No. 4 QCPU QJ71LP21-25 QJ72LP25-25 QJ72LP25-25 QJ72LP25-25 QJ72LP25-25 2) SW009C to SW009F status Station No.

  • Page 237: Error Codes

    8 TROUBLESHOOTING MELSEC-Q 8.3 Error Codes 8.3.1 MELSECNET/H error code list When data linking cannot be performed using the cyclic transmission, or when communication cannot be performed normally using the transient transmission with an instruction of a sequence program or GX Developer, the error codes (hexadecimal) are stored in the special link register or displayed on the GX Developer's system monitor.
  • Page 238 8 TROUBLESHOOTING MELSEC-Q For the remote master station, check the code, history, description, and action of the error that occurred on the network module on the portions of the module detailed information screen shown below. For the error code of the transient instruction issued by a PLC program, check the device data of section (3).
  • Page 239 8 TROUBLESHOOTING MELSEC-Q (2) Checking error codes with devices To monitor the error code from an Ethernet module and so on using the MELSEC communication protocol, check the link special register below. SW0020: Module status SW0048: Cause of baton pass interruption SW0049: Cause of data link transmission stop SW004B: Host CPU status SW004D: Data link running status (host)
  • Page 240 8 TROUBLESHOOTING MELSEC-Q (3) Storage of the error codes of the link dedicated instruction Check the error code generated when the link dedicated instruction is executed through the device data below. The error codes of the transient transmission are also stored in the link special registers SW00EE to SW0FF.
  • Page 241 Check for faulty cables, faulty hardware, noise, incorrect wiring, and duplication of station numbers, control stations, and remote master stations. The hardware of the network module is faulty. F11C System error Contact your local Mitsubishi representative. 8 - 30 8 - 30...
  • Page 242 The hardware of the network module is faulty. F221 System error Contact your local Mitsubishi representative. Retry after a little while. If the error recurs as a result of a retry, review the number of transient No free area in the receive buffer...
  • Page 243 System error If a communication error has occurred, review the cable. If not, the hardware of the network module is faulty. F70E System error Contact your local Mitsubishi representative. F710 System error The hardware of the network module is faulty. F711 System error Contact your local Mitsubishi representative.
  • Page 244 Description of error Corrective measure The hardware of the network module is faulty. F7CD System error Contact your local Mitsubishi representative. Confirm the set values (mode, etc.) in the control data of a dedicated F7E1 Control data error instruction. F7E2 System error The hardware of the network module is faulty.
  • Page 245 Link parameter error Create and write new network parameters to the PLC. If the error recurs, the hardware of the CPU or network module is faulty. Contact your local Mitsubishi representative. Review station-specific parameters. Set common parameters station-specific parameters for the sending range of the host station.
  • Page 246 Create and write network parameters to the PLC. If the error recurs, the hardware of the CPU or network module is faulty. F841 System error Contact your local Mitsubishi representative. Create and write network parameters to the PLC. F842 System error If the error recurs, the hardware of the CPU or network module is faulty.
  • Page 247 If the error frequently occurs, check the line and the wiring status. The hardware of the network module is faulty. FD1D System error Contact your local Mitsubishi representative. FD1E Bus topology, test disabled error Conduct a test that can be executed in the bus topology.
  • Page 248 FE26 System error station CPU modules. Alternatively, change the CPU module concerned. The hardware of the CPU or network module is faulty. FE27 System error Contact your local Mitsubishi representative. FE30 System error FE31 System error FE32 System error The hardware of the network module is faulty.

  • Page 249: Error Codes Corresponding To Cpu Module Detected On Remote I/O Station

    "Operating Statuses of CPU" described in Section 8.3.2 (1) "Error Code List" 2 : If any error code not listed in this section is detected, please consult your local Mitsubishi representative. 8 - 38 8 - 38...
  • Page 250 8 TROUBLESHOOTING MELSEC-Q (1) Error code list The following information deals with error codes and the meanings, causes, and corrective measures of error messages. <Relevant CPU> : Indicates all the QnACPUs and QCPU. QCPU : Indicates all the Q series CPU modules. Q00J/Q00/Q01 : Indicates the Basic model QCPU.
  • Page 251 QnPRH or the redundant base unit failure (Contact your local Mitsubishi are detected. representative.) Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
  • Page 252 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 1010 1011 When an END END NOT ---- ---- Flicker Stop instruction EXECUTE executed.
  • Page 253 The SFC program cannot be normally again, this suggests a CPU module terminated due to noise or other hardware fault. (Contact your local reason. Mitsubishi representative.) • The SFC program cannot be Q00J/Q00/ 1020 normally terminated due to noise or any similar cause.
  • Page 254 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 1101 1102 1103 1104 At power ON/ RAM ERROR ---- ---- Flicker Stop At reset 1105 STOP RUN/...
  • Page 255 If the same error is displayed again, module is faulty. QnPRH the possible cause is a CPU module hardware fault. (Contact your local Mitsubishi representative, explaining a detailed description of the problem.) 1107 The work area RAM in the CPU module is faulty.
  • Page 256 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 1112 TRK. CIR. During ---- ---- Flicker Stop ERROR running 1113 TRK. CIR. At power ON/ 1115 ----...
  • Page 257 CPU module. the standby system being powered (Please contact your local Mitsubishi off or reset. representative, explaining a detailed • The tracking cable is not secured by description of the problem.)
  • Page 258 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 1200 OPE. At power ON/ 1201 CIRCUIT ---- ---- Flicker Stop At reset ERR.
  • Page 259 The operation circuit for indexing in the This suggests a CPU module 1203 CPU module does not operate hardware fault. (Contact your local normally. Mitsubishi representative.) The hardware (logic) in the CPU Q4AR 1204 module does not operate normally. QnPRH...
  • Page 260 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU Unit No. [For Remote I/ When an END FUSE BREAK Off/ Flicker/ Stop/ 1300 O network] ----...
  • Page 261 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • Check ERR. LED of the output modules and replace the fuse of the module whose LED is lit. • Read the common information of the error using the peripheral device and replace the fuse at the output module corresponding to the numerical value (module No.) reading.
  • Page 262 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 1310 I/O INT. During ---- ---- Flicker Stop ERROR interrupt 1311 At power ON/ At reset/When SP.
  • Page 263 An interruption has occurred although Therefore, check the mounted 1310 there is no interrupt module. modules and change the faulty module. (Contact your local Mitsubishi representative.) Take action so that an interrupt will not An interrupt request from other than Q00J/Q00/ be issued from other than the interrupt the interrupt module was detected.
  • Page 264 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When an intelligent function SP. UNIT Program error Off/ Flicker/ Stop/ Unit No. module DOWN location...
  • Page 265 Q00J/Q00/Q01 • The I/O module (intelligent function fault. (Contact your local Mitsubishi module) is nearly removed, representative.) completely removed, or mounted during running. • There was no response from the...
  • Page 266 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU CONTROL- At power ON/ 1411 Unit No. ---- Flicker Stop BUS. ERR. At reset During Program error execution of...
  • Page 267 QnPH • The intelligent function module, CPU 1413 module or base unit is faulty. (Contact your local Mitsubishi representative.) An error is detected on the system Reset the CPU module and RUN it bus. again. If the same error is displayed •...
  • Page 268 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When an END CONTROL- 1414 Unit No. ---- Flicker Stop instruction BUS. ERR. executed.
  • Page 269 QnPH multiple CPU system is mounted. again, the intelligent function 1414 module, CPU module or base unit is faulty. (Contact your local Mitsubishi representative.) Reset the CPU module and RUN it Q00J/Q00/ again. If the same error is displayed An error is detected on the system...
  • Page 270 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU AC/DC 1500 ---- ---- Continue Always DOWN DUAL DC ---- ---- Continue Always DOWN 5V 1510 Base No./...
  • Page 271 Qn(H) A fault of one redundant power supply supply module. (Contact your local QnPH module was detected in the redundant Mitsubishi representative, explaining a QnPRH power supply system. detailed description of the problem.) The 24 VDC power supplied to the...
  • Page 272 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU Unit No. [For Remote I/ When an END UNIT VERIFY Off/ Flicker/ Stop/ 2000 O network] ----...
  • Page 273 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Replace the CPU module incompatible In a multiple CPU system, a CPU with the multiple CPU system with a Qn(H) module incompatible with the multiple CPU module compatible with the QnPH CPU system is mounted.
  • Page 274 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU SP. UNIT LAY At power ON/ 2100 Unit No. ---- Flicker Stop ERR. At reset Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
  • Page 275 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The slot to which the QI60 is mounted is set to other than Inteli (intelligent Make setting again to match the PLC Qn(H) function module) or Interrupt (interrupt parameter I/O assignment with the QnPH module) in the I/O assignment of PLC...
  • Page 276 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2101 2102 SP. UNIT LAY At power ON/ Unit No. ---- Flicker Stop ERR.
  • Page 277 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) 13 or more A-series special function Reduce the A series special function modules (except for the A1SI61) that modules (except the A1SI61) that can Qn(H) can initiate an interrupt to the CPU make an interrupt start to the CPU module have been installed.
  • Page 278 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2104 SP. UNIT LAY At power ON/ Unit No. ---- Flicker Stop ERR. At reset 2105 Characters in parentheses ( ) indicate the special register numbers where individual information is being...
  • Page 279 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) At the MELSECNET/MINI auto refresh Reset the network parameter network parameter settings, the MELSECNET/MINI auto refresh unit module allocation that was set is 2104 module allocation setting so that it different from the actual module conforms to the station number of the models at the station numbers in the...
  • Page 280 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU SP. UNIT LAY At power ON/ 2106 Unit No. ---- Flicker Stop ERR. At reset *1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
  • Page 281 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • 5 or more MELSECNET/H modules • Reduce the number of have been installed in a whole MELSECNET/H modules to 4 or multiple CPU system. less in the whole multiple CPU Qn(H) •...
  • Page 282 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2107 Stop SP. UNIT LAY At power ON/ Unit No. ---- Flicker 2108 ERR.
  • Page 283 • The location designated by a link hardware fault. Therefore, change direct device (J \ ) is not a network the faulty module. Alternatively, module. contact your local Mitsubishi • The I/O module (intelligent function representative. 2111 module/special function module)
  • Page 284 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When instruction SP. UNIT Program error Off/ Flicker/ Stop/ 2112 Unit No. executed/ ERROR location Continue...
  • Page 285 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • Read the individual information of • The module other than special the error using a peripheral device, function module is specified by the and check the special function special function module dedicated module dedicated instruction instruction.
  • Page 286 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2114 2115 2116 When SP. UNIT Program error Off/ Flicker/ Stop/ Unit No. instruction ERROR location...
  • Page 287 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) An instruction, which on execution specifies other stations, has been 2114 used for specifying the host CPU. (An instruction that does not allow the host CPU to be specified). An instruction, which on execution specifies the host CPU, has been used 2115...
  • Page 288 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2120 2121 2122 SP. UNIT LAY At power ON/ ---- ---- Flicker Stop ERR.
  • Page 289 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Q00J/Q00/ The location of Q B and QA1S B is 2120 Check the location of the base unit. improper. Qn(H) QnPH Check the loading position of the CPU Qn(H) The CPU module is installed to other 2121...
  • Page 290 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2125 SP. UNIT LAY. At power ON/ Unit No. ---- Flicker Stop ERR. At reset 2126 2150...
  • Page 291 QCPU 2125 • There was no response form the experiencing a hardware fault. intelligent function module/special (Contact your local Mitsubishi function module. representative.) • Mount modules on the available slots so that the empty slots will be CPU module locations in a multiple located on the right-hand side of the CPU system are either of the following.
  • Page 292 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2210 BOOT At power ON/ Drive name ---- Flicker Stop ERROR At reset 2211 2300 When memory...
  • Page 293 DIP switches. • Reboot. • CPU module hardware fault. 2211 File formatting failed at a boot. (Contact your local Mitsubishi QnPRH representative, explaining a detailed description of the problem.) • A memory card was removed without switching the memory card •...
  • Page 294 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU FILE SET File name/ Parameter At power ON/ 2400 Flicker Stop ERROR Drive name number At reset FILE SET...
  • Page 295 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • Execute automatic write to standard ROM on the CPU module which is Automatic write to standard ROM was compatible with automatic write to performed on the CPU module that is standard ROM.
  • Page 296 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU FILE SET File name/ Parameter At power ON/ 2402 Flicker Stop ERROR Drive Name number At reset 2410...
  • Page 297 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Though the file register has been set in Confirm the file register and 2402 the pairing setting/tracking setting, the Q4AR parameter. file register does not exist. • Read the individual information of the error using the peripheral device, check to be sure that the program •...
  • Page 298 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 2500 2501 CAN'T EXE. File name/ At power ON/ ---- Flicker Stop PRG. Drive name At reset 2502...
  • Page 299 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • Read the common information of the error using the peripheral device, check to be sure that the parameter • There is a program file that uses a device allocation setting and the device that is out of the range set in program file device allocation...
  • Page 300 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3000 At power ON/ PARAMETER File name/ Parameter Flicker Stop At reset/ ERROR Drive name number STOP RUN...
  • Page 301 • If the same error occurs, it is thought 3001 The parameter settings are corrupted. to be a hardware error. (Contact When "Use the following file" is your local Mitsubishi representative.) selected for the file register in the PLC Qn(H) file setting of the PLC parameter dialog 3002...
  • Page 302 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU At power ON/ PARAMETER File name/ Parameter 3004 Flicker Stop At reset/ ERROR Drive name number STOP RUN...
  • Page 303 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Check whether the parameter file The parameter file is incorrect. version is .QPA, and check the 3004 Alternatively, the contents of the file file contents to be sure they are are not parameters.
  • Page 304 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3010 3012 At power ON/ PARAMETER File name/ Parameter Flicker Stop At reset/ ERROR Drive name number...
  • Page 305 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Match the number of (CPU modules in The parameter-set number of CPU multiple CPU setting) - (CPUs set as Qn(H) 3010 modules differs from the actual empty in I/O assignment) with that of QnPH number in a multiple CPU system.
  • Page 306 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3040 PARAMETER At power ON/ ---- ---- Flicker Stop ERROR At reset 3041 PARAMETER At power ON/ 3042...
  • Page 307 CPU module. If the same error occurs, it is thought to be a hardware error. (Contact your local Mitsubishi representative.) • When a valid drive for parameter is The system file that have stored the...
  • Page 308 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU At power ON/ LINK PARA. File name/ Parameter 3100 Flicker Stop At reset/ ERROR Drive name number...
  • Page 309 (RESET RUN is required to checks, the possible cause is a change the station type.) hardware fault. (Contact your local Mitsubishi representative, explaining a detailed description of the problem.) • Correct and write the network Although the QnACPU is a control parameters.
  • Page 310 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When an END LINK PARA. File name/ Parameter Flicker Stop instruction ERROR Drive name number executed.
  • Page 311 10 is out of the specified area. If the error occurs after the above checks, the cause is a hardware fault. (Contact your local Mitsubishi representative, explaining a detailed description of the problem.) A multi-remote I/O network was...
  • Page 312 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU At power ON/ LINK PARA. File name/ Parameter 3102 Flicker Stop At reset/ ERROR Drive name number...
  • Page 313 • If the error occurs after correction, it • A MELSECNET/H network suggests a hardware fault. (Contact parameter error was detected. your local Mitsubishi representative.) The station No. specified in pairing 3102 setting are not correct. Refer to the troubleshooting of the •...
  • Page 314 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3104 At power ON/ LINK PARA. File name/ Parameter Flicker Stop At reset/ ERROR Drive name number...
  • Page 315 • If the error occurs after correction, it network parameter is out of range. suggests a hardware fault. (Contact • The specified I/O No. is outside the your local Mitsubishi representative.) range of the used CPU module. • The Ethernet-specific parameter setting is not normal.
  • Page 316 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3200 3201 SFC PARA. Parameter File name Flicker Stop STOP RUN ERROR number 3202 3203 At power ON/...
  • Page 317 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The parameter setting is illegal. • Though Block 0 was set to Q00J/Q00/ 3200 "Automatic start" in the SFC setting of the PLC parameter dialog box, QnPH Block 0 does not exist.
  • Page 318 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 3400 At power ON/ REMOTE ---- ---- Flicker Stop At reset/ PASS. ERR. STOP RUN 3401 *1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being...
  • Page 319 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Qn(H) The head I/O number of the target Change the head I/O number of the QnPH module in the remote password file is target module to within the 0 to 0FF0 QnPRH set to other than 0...
  • Page 320 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4000 4001 INSTRCT. Program error ---- Flicker Stop CODE ERR location 4002 At power ON/ At reset/ 4003 STOP RUN...
  • Page 321 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • The program contains an instruction code that cannot be decoded. 4000 • An unusable instruction is included in the program. Q00J/Q00/ The program contains a dedicated 4001 instruction for SFC although it is not an Qn(H)
  • Page 322 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4100 4101 When OPERATION Program error Off/ Flicker/ Stop/ ---- instruction ERROR location Continue executed.
  • Page 323 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The instruction cannot process the 4100 contained data. • The designated device number for data processed by the instruction exceeds the usable range. Read the common information of the •...
  • Page 324 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4105 4107 When OPERATION Program error Off/ Flicker/ Stop/ 4108 ---- instruction ERROR location Continue executed.
  • Page 325 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Delete the program memory check PLOADP/PUNLOADP/PSWAPP Qn(H) When using the program memory 4105 instructins were executed while setting QnPH check, delete PLOADP/PUNLOADP/ program memory check QnPRH PSWAPP instructions. Using the multiple CPU dedicated Q00/Q01 33 or more multiple CPU dedicated...
  • Page 326 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4120 When OPERATION Program error Off/ Flicker/ Stop/ ---- instruction ERROR location Continue executed.
  • Page 327 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Since the manual system switching enable flag (special register SM1592) To execute control system switching is OFF, manual system switching by the SP. CONTSW instruction, turn 4120 cannot be executed by the control ON the manual system switching system switching instruction...
  • Page 328 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When FOR NEXT Program error 4200 ---- Flicker Stop instruction ERROR location executed. 4201 When FOR NEXT...
  • Page 329 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) No NEXT instruction was executed following the execution of a FOR 4200 instruction. Read the common information of the Alternatively, there are fewer NEXT error using the peripheral device, instructions than FOR instructions.
  • Page 330 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4230 4231 INST. When Program error FORMAT ---- Flicker Stop instruction location ERR. executed.
  • Page 331 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The number of CHK and CHKEND 4230 Qn(H) instructions is not equal. QnPH The number of IX and IXEND Read the common information of the 4231 instructions is not equal. error using the peripheral device, check error step corresponding to its The configuration of the check...
  • Page 332 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4421 4422 Program error CAN'T SET(S) ---- Flicker Stop STOP RUN location 4423 4430 SFC EXE.
  • Page 333 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Total number of steps in all SFC Reduce total number of steps to below 4421 programs exceed the range. the maximum. Read common information of the error using the peripheral device, check Step number designations overlap in 4422...
  • Page 334 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4500 4501 4502 4503 SFCP. Program error FORMAT ---- Flicker Stop STOP RUN location ERR.
  • Page 335 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The numbers of BLOCK and BEND Read common information of the error 4500 instructions in an SFC program are not using the peripheral device, check equal. error step corresponding to its The configuration of the STEP* to numerical value (program error 4501...
  • Page 336 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 4610 SFCP. EXE. Program error ---- Continue STOP RUN ERROR location 4611 4620 When BLOCK EXE.
  • Page 337 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The active step information at Read common information of the error 4610 presumptive start of an SFC program using the peripheral device, check is incorrect. error step corresponding to its numerical value (program error Key-switch was reset during RUN location), and correct the problem.
  • Page 338 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 5000 Time (value Time (value WDT ERROR actually Flicker Stop Always set) measured) 5001 5010 Time (value...
  • Page 339 CPU module. off or reset. (Contact your local Mitsubishi • The tracking cable is not secured by representative, explaining a detailed the connector fixing screws.
  • Page 340 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU PRB. VERIFY File name ---- Flicker Stop Always ERR. 6000 FILE DIFF. File name ---- Flicker Stop...
  • Page 341 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The control system and standby Synchronise the programs and system in the redundant system do not parameters of the control system and Q4AR have the same programs and standby system.
  • Page 342 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU At power ON/ At reset/At tracking cable 6001 FILE DIFF. ---- ---- Flicker Stop connection/At operation...
  • Page 343 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) In a redundant system, the valid Match the valid parameter drive parameter drive settings (SW2, SW3) settings (SW2, SW3) by the DIP 6001 QnPRH made by the DIP switches are not the switches of the control system and same.
  • Page 344 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU CAN'T EXE. 6050 ---- ---- Continue Always MODE At power ON/ CPU MODE At reset/At 6060 ----...
  • Page 345 QnPRH system status (control system). then ON. Hardware fault of the CPU module. (Please contact your local nearest Mitsubishi or sales representative, A CPU module tracking memory error explaining a detailed description of the Q4AR was detected during initial. problem. Change the CPU modules in...
  • Page 346 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When an END TRUCKIN ---- ---- Continue instruction ERR. executed. 6101 Tracking transmission data classification 6102...
  • Page 347 (including reset).) indicates the CPU module or • The error occurred at a startup since tracking cable is faulty. (Contact the redundant system startup your local Mitsubishi representative, QnPRH procedure was not followed. explaining a detailed description of the problem.) •...
  • Page 348 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 6107 TRK. TRANS. ---- ---- Continue Always ERR. 6108 Tracking When an END TRK.
  • Page 349 • A data error (other than sum value indicates the CPU module or error) occurred in tracking (data tracking cable is faulty. (Contact reception). your local Mitsubishi representative, (This error may be caused by explaining a detailed description of 6108 tracking cable removal or other the problem.)
  • Page 350 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU TRK. 6130 DISCONNECT ---- ---- Continue Always TRK.INIT. At power ON/ 6140 ---- ---- Flicker Stop...
  • Page 351 • The CPU module side tracking error, the tracking cable or CPU hardware became faulty. module side tracking hardware is faulty. (Contact your local Mitsubishi representative, explaining a detailed QnPRH description of the problem.) • Power the corresponding CPU module OFF and then ON again, or reset it and then unreset.
  • Page 352 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU Reason(s) for CONTROL system ---- Continue Always EXE.*4 switching 6200 Reason(s) for CONTROL system ---- No error...
  • Page 353 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) The standby system in a redundant system is switched to the control Check the control system condition. Q4AR system. The standby system has been switched to the control system in a redundant system.
  • Page 354 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU Reason(s) for CAN'T EXE. At switching system ---- Continue CHANGE request switching 6220 Reason(s) for Reason(s) for CAN'T...
  • Page 355 This is a bus switching module Switching is disabled because of a bus 6221 hardware fault. (Contact your local switching module error. Mitsubishi representative.) Q4AR The link module mounted on the 6230 standby type CPU is the remote Check the system configuration status.
  • Page 356 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU STANDBY 6300 ---- ---- Continue Always SYS. DOWN CONTROL 6310 ---- ---- Flicker Stop Always SYS.
  • Page 357 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) • Check whether the standby system is on or not, and if it is not on, power it on. Any of the following errors was • Check whether the standby system detected in the backup mode.
  • Page 358 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 6311 CONTROL At power ON/ ---- ---- Flicker Stop SYS. DOWN At reset 6312 At execution of the memory...
  • Page 359 QnPRH in a redundant system, the other the CPU module is faulty. (Contact system cannot start as a standby your local Mitsubishi representative, 6312 system. explaining a detailed description of After the memory copy from control...
  • Page 360 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU 7002 MULTI CPU At power ON/ Unit No. ---- Flicker Stop DOWN At reset 7003 MULTI CPU 7004...
  • Page 361 • There is no response from the target fault of any of the CPU modules. CPU module in a multiple CPU (Contact your local Mitsubishi system during initial communication. representative.) 7002 • In a multiple CPU system, a CPU •...
  • Page 362 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU MULTI EXE. At power ON/ 7011 Unit No. ---- Flicker Stop ERROR At reset MULTI CPU 7020 Unit No.
  • Page 363 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Either of the following settings was made in a multiple CPU system. • Multiple CPU automatic refresh • Correct the multiple CPU automatic setting was made for the inapplicable refresh setting.
  • Page 364 8 TROUBLESHOOTING MELSEC-Q Error Common Individual LED Status Operating Error Diagnostic Code Information Information Statuses Messages Timing ERROR (SD0) (SD5 to 15) (SD16 to 26) of CPU When Program error Annunciator 9000 F**** Continue instruction location number USER LED On executed.
  • Page 365 8 TROUBLESHOOTING MELSEC-Q Error Corresponding Code Error Contents and Cause Corrective Action (SD0) Read the individual information of the error using the peripheral device, and 9000 Annunciator (F) was set ON check the program corresponding to the numerical value (annunciator number).
  • Page 366 8 TROUBLESHOOTING MELSEC-Q (2) Clearing an error If the error, which allows the operation to continue, occurs, it can be cleared by remote I/O module as well as CPU module. Make sure to clear the error by remote I/O module, then perform the error clear operation by CPU module.

  • Page 367: H/W Information

    8 TROUBLESHOOTING MELSEC-Q 8.4 H/W Information H/W information screen displays details of the LED and switch information of the network modules. To display the H/W information screen, click the H/W information button on the system monitor window of GX Developer. (1) H/W information on the master module 2) -b 1) -a...
  • Page 368 8 TROUBLESHOOTING MELSEC-Q (2) H/W switch information This indicates the switch setting data for the master module. 2)-a: Shows the switch settings for the hardware mounted to the master module. Item Description STx10 10 position of station number setting switch. STx 1 1 position of station number setting switch.

  • Page 369: Appendix 1 Precautions When Changing Over From A Melsecnet/10 Remote I/O Network To A Melsecnet/H Remote I/O Network

    APPENDIX MELSEC-Q APPENDIX Appendix 1 Precautions when Changing Over from a MELSECNET/10 Remote I/O Network to a MELSECNET/H Remote I/O Network. The following describes the precautions to take when switching from an AnUCPU, QnACPU MELSECNET/10 remote I/O network to a QCPU MELSECNET/H remote I/O network.
  • Page 370 APPENDIX MELSEC-Q (5) Correcting the sequence program There is no need to change sequence programs such as the interlock program that used link special relays and link special resistors and the remote access program that used data link commands. However, the data link instructions (ZNFR/ZNTO instructions) used for accessing the buffer memory of the intelligent function module of the remote I/O station and the data link instructions (ZNRD/ZNWR instructions) used for reading/writing of the remote station word device cannot be used on the MELSECNET/H remote...

  • Page 371: Appendix 2 Link Special Relay (Sb) List

    APPENDIX MELSEC-Q Appendix 2 Link Special Relay (SB) List The link special relay turns on/off by various factors that occur during data linking. Thus, by monitoring or using it in the sequence program, the abnormal status of the data link can be checked. Moreover, the link special relay (SB) that stores the link status is used for the detailed information of the network diagnostics of GX Developer.
  • Page 372 On: Redundant function supported Indicates the external power supply status to QJ71LP21S-25. SB0042 Power supply status of (When using QJ71LP21-25, 0 is ON.) (66) host Off: Not supplied On: Supplied Indicates the mode set by the switch of the host's network module.
  • Page 373 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O Name Description master station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial When PLC to PLC network Indicates the station type set with the parameter of the host's network module.
  • Page 374 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the completion status of the cyclic transmission. Cyclic transmission start SB0051 Off: Not completed (SB0002 is off)
  • Page 375 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O Name Description master station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the transmission designation status (status of supplemental settings of the common parameters). SB0069 Multiplex transmission (Valid when the SB0049 is off.)
  • Page 376 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the parameter status of each station. (Not applicable to reserved stations and the station with the maximum station Parameter status of each number and higher)
  • Page 377 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the status of stations connected to the reverse loop. Off: All stations normal SB0095 Reverse loop status...
  • Page 378 APPENDIX MELSEC-Q Table 1 Special link relay (SB) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the online test response status. SB00AA Online test response Off: No response (170) instruction...

  • Page 379: Appendix 3 Link Special Register (Sw) List

    APPENDIX MELSEC-Q Appendix 3 Link Special Register (SW) List In the link special register, the data linking information is stored as numeric values. Thus, faulty areas and causes of errors can be checked using or monitoring the link special registers in the sequence programs. Moreover, the link special register (SW) that stores the link status is used for the detailed information of the network diagnostics of GX Developer.
  • Page 380 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Sets the logical channel number for physical channel number 4. (Valid only for channels on the receiving side) SW000B Logical channel setting...
  • Page 381 APPENDIX MELSEC-Q Table 2 Link special Register (SW) List (Continued) Use permitted/prohibited Remote Control Normal Remote I/O Name Description master station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates the processing result of the ZNWR instruction. ZNWR instruction : Normal completion processing result...
  • Page 382 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial On inter-PLC network: Stores the condition setting switch status of the host.
  • Page 383 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the station that stopped the host data linking. (Valid when the SW0049 is 1.) b15 b14 to b7 b6 b5 b4 b3...
  • Page 384 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial At the PLC to PLC network. Stores the status of the parameters. SW0055 Parameter setting status : Normal parameter...
  • Page 385 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the maximum/minimum/current values of the link scan SW006B Maximum link scan time time (unit (ms)).
  • Page 386 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the cyclic transmission status of each station (including the host).
  • Page 387 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the CPU RUN status of each station (including the host). The standby-system Q4ARCPU stores the key switch status at normal state.
  • Page 388 Indicates whether external power supply is available to each station (For QJ71LP21-25, 0 is ON.) Valid only for stations registered as normal in the SW70 to SW73. SW008C 0: Without external power supply (Including stations reserved or...
  • Page 389 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the reverse loop status of each station (including the host).
  • Page 390 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the online test items on the responding side. (Valid when the SB00AB is on.) Stations disconnected from the network are not included among the faulty stations because there is no response.
  • Page 391 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores each station’s forward loop usage status during multiplex transmission.
  • Page 392 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Accumulates and stores the number of "DPLL" errors on the DPLL error on the forward forward loop side for the optical loop, or the number of "DPLL"...
  • Page 393 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Stores the cause and status of the loop switch. Whether the data should be overwritten or retained is set in the common parameters.
  • Page 394 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Accumulates and stores the number of transient transmission Transient transmission SW00EE errors.
  • Page 395 APPENDIX MELSEC-Q Table 2 Link special register (SW) list (Continued) Use permitted/prohibited Remote Control Normal Remote I/O master Name Description station station station station Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial Indicates whether there is a mismatch between the network types of the control station and normal stations on the network.

  • Page 396: Appendix 4 Special Relay (Sm) For Remote I/O Modules List

    APPENDIX MELSEC-Q Appendix 4 Special Relay (SM) for Remote I/O Modules List Special relays SM are internal relays whose specifications are decided by the CPU and remote I/O module. For this reason, they cannot be used by sequence programs in the same way as the normal internal relays. However, they can be turned ON or OFF as needed in order to control the CPU and remote I/O modules.
  • Page 397 APPENDIX MELSEC-Q Special Relay List (1) Diagnostic Information Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When Set) • ON if diagnosis results show error occurrence OFF: No error (Includes external diagnosis) Diagnostic errors S (Error) ON : Error •...
  • Page 398 APPENDIX MELSEC-Q (4) Redundant power supply module information Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When Set) OFF: No redundant power supply module with • Turns ON when one or more redundant power supply input power OFF modules with input power OFF are detected. detected Power supply off •...

  • Page 399: Appendix 5 Special Register (Sd) For Remote I/O Module List

    APPENDIX MELSEC-Q Appendix 5 Special Register (SD) for Remote I/O Module List Special registers SD are internal registers whose specifications are decided by the CPU and remote I/O module. For this reason, they cannot be used by sequence programs in the same way as the normal internal registers. However, they can be used to write data as needed in order to control the CPU and remote I/O modules.
  • Page 400 APPENDIX MELSEC-Q Special Register List (1) Diagnostic Information Set by Corresponding Applicable Number Name Meaning Explanation (When ACPU set) Diagnostic Diagnosis • Error codes for errors found by diagnosis are stored as BIN data. D9008 format S (Error) errors error code •...
  • Page 401 APPENDIX MELSEC-Q Special Register List (Continued) Set by Corresponding Applicable Number Name Meaning Explanation (When ACPU set) • Common information corresponding to the error codes (SD0) is stored here. • The following four types of information are stored here: Slot No. Meaning Number Slot No./PLC No.
  • Page 402 APPENDIX MELSEC-Q Special Register List (Continued) Set by Corresponding Applicable Number Name Meaning Explanation (When ACPU set) Time (value set) Meaning Number Time : 1 µs units (0 to 999 µs) Time : 1 ms units (0 to 65535 ms) SD10 SD10 SD11...
  • Page 403 APPENDIX MELSEC-Q Special Register List (Continued) Set by Corresponding Applicable Number Name Meaning Explanation (When ACPU set) • Individual information corresponding to error codes (SD0) is stored here. SD16 File name/Drive name (Example) File name= Number Meaning ABCDEFGH. IJK SD16 Drive B15 to B8 B7 to B0 SD17...
  • Page 404 APPENDIX MELSEC-Q Special Register List (Continued) Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) Error number that • Stores error number that performs error reset SD50 Error reset + Rem performs error reset • Each time the voltage falls below 85% of normal (AC power/65% AC DOWN AC DOWN Number DC power) while the CPU module is calculating, it will be saved...
  • Page 405 APPENDIX MELSEC-Q Special Register List (2) System information Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) • The switch status of the remote I/O module is stored in the following format. B4 B3 S (Always) Remote Vacant Remote I/O module switch status Always 1: STOP •...
  • Page 406 APPENDIX MELSEC-Q Special Register List (Continued) Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) • The operating status of the remote I/O module is stored in the following format. B4 B3 S (Always) Remote Vacant Remote I/O module operating status Always 2: STOP •...
  • Page 407 APPENDIX MELSEC-Q Special Register List (Continued) Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) 0: Automatic mode SD240 Base mode • Stores the base mode. S (Initial) 1: Detail mode : Main only No. of 1 to 7: No. of SD241 extension •...
  • Page 408 APPENDIX MELSEC-Q Special Register List (Continued) Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) No. of modules SD340 • Indicates the number of modules installed on Ethernet. installed SD341 I/O No. • Ethernet I/O No. of the 1st module installed. Network SD342 •...
  • Page 409 APPENDIX MELSEC-Q (4) Fuse blown module Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) SD1300 • The numbers of output modules whose fuses have blown are D9100 input as a bit pattern (in units of 16 points). SD1301 D9101 (If the module numbers are set by parameter, the parameter-set...
  • Page 410 APPENDIX MELSEC-Q (6) Redundant power supply module information SD1780 to SD1789 are valid only for a redundant power supply system. The bits are all 0 for a singular power supply system. Corresponding Set by Applicable Number Name Meaning Explanation ACPU (When set) •...

  • Page 411: Appendix 6 Discontinued Models That Can Be Mounted On Remote I/O Stations

    APPENDIX MELSEC-Q Appendix 6 Discontinued Models that can be Mounted on Remote I/O Stations Some of disontinued Q series models are applicable to remote I/O stations. Note that restrictions apply to the following modules. Module model Description QJ71E71 • Function version B or later is applicable. •...

  • Page 412: Appendix 7 External Dimensions

    Appendix 7 External Dimensions (1) QJ71LP21-25, QJ71LP21G, QJ71LP25GE QJ71LP21-25 T.PASS D.LINK ERR. L ERR. STATION NO. MODE QJ71LP21 90(3.54) 27.4(1.08) Unit: mm (in.) *1: Please contact your nearest Mitsubishi Electric System Service Corporation for detail. App - 44 App - 44...
  • Page 413 QJ71LP21S-25 EXT.PW T.PASS D.LINK ERR. L ERR. STATION NO. EXT.PW EXT.PW MODE +24V +24V (FG) QJ71LP21S-25 (0.43) 90(3.54) 55.2(2.17) Unit: mm (in.) *1: Please contact your nearest Mitsubishi Electric System Service Corporation for detail. App - 45 App - 45...
  • Page 414 APPENDIX MELSEC-Q (3) QJ71BR11 QJ71BR11 D.LINK T.PASS L ERR. ERR. STATION NO. MODE QJ71BR11 90(3.54) 27.4(1.08) 55(2.17) Unit: mm (in.) App - 46 App - 46...
  • Page 415 (4) QJ72LP25-25, QJ72LP25G, QJ72LP25GE RS-232 STATION NO. RESET MODE Q J 7 2 L P 2 5 -2 5 90(3.54) 27.4(1.08) Unit: mm (in.) *1: Please contact your nearest Mitsubishi Electric System Service Corporation for detail. App - 47 App - 47...
  • Page 416 APPENDIX MELSEC-Q (5) QJ72BR15 RS-232 STATION RESET MODE Q J 7 2 B R 1 5 90(3.54) 55(2.17) 27.4(1.08) Unit: mm (in.) App - 48 App - 48...
  • Page 417 INDEX Communication test ........4-28 Block guarantee per station ......6-7 Host information ...........8-4 Setup confirmation test ......4-26 Other station information......8-6 Coaxial cable ........... 3-4 Loop test.............4-25 Common parameter Network setting LX/LY setting ..........5-9 Start I/O No...........5-6 LB/LW setting ..........5-11 Network No...........5-6 Reserved station designation....
  • Page 418 Special register (SD) for remote I/O station ..........App-31 Special relay (SM) for remote I/O station ..........App-28 Supplemental setting........5-14 Switch setting Station setting switch......4-2,4-5 Mode setting switch....... 4-2,4-5 Test Self-loopback test ........4-11 Forward loop/reverse loop test ....4-21 Internal self-loopback test ......
  • Page 419 6. Failure caused by reasons unpredictable by scientific technology standards at time of shipment from Mitsubishi. 7. Any other failure found not to be the responsibility of Mitsubishi or that admitted not to be so by the user. 2. Onerous repair term after discontinuation of production (1) Mitsubishi shall accept onerous product repairs for seven (7) years after production of the product is discontinued.
  • Page 420 Microsoft Windows, Microsoft Windows NT are registered trademarks of Microsoft Corporation in the United States and other countries. Pentium is a registered trademark of Intel Corporation in the United States and other countries. Ethernet is a registered trademark of Xerox. Co., Ltd in the United States. countries. Other company and product names herein are either trademarks or registered trademarks of their respective owners.
  • Page 422 Q Corresponding MELSECNET/H Network System Reference Manual (Remote I/O network) Q-NET/H-R-I/O-E MODEL MODEL 13JF96 CODE SH(NA)-080124-H(0509)MEE HEAD OFFICE : 1-8-12, OFFICE TOWER Z 14F HARUMI CHUO-KU 104-6212,JAPAN NAGOYA WORKS : 1-14 , YADA-MINAMI 5-CHOME , HIGASHI-KU, NAGOYA , JAPAN When exported from Japan, this manual does not require application to the Ministry of Economy, Trade and Industry for service transaction permission.

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