AC Tech Lenze RS-485 Reference Manual
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AC Tech Lenze RS-485 Reference Manual

AC Tech Lenze RS-485 Reference Manual

Modbus communication module
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CMVMB401B
SMVector
RS-485 Modbus Communication Module
Communications Interface Reference Guide

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Summary of Contents for AC Tech Lenze RS-485

  • Page 1 CMVMB401B SMVector RS-485 Modbus Communication Module Communications Interface Reference Guide...
  • Page 2 About these instructions This documentation applies to the RS-485 / Modbus communications option for the SMVector inverter and should be used in conjunction with the SMVector Operating Instructions (Document SV01) that shipped with the drive. These documents should be read carefully as they contain important technical data and describe the installation and operation of the drive and this option.

  • Page 3: Table Of Contents

    Contents Safety information ..............2 Introduction ................4 Overview ....................4 SMVector Modbus RTU Implementation Specifications ......4 Installation ................5 Installing the Module into the Terminal Cover ..........5 RS-485 / Modbus RTU terminal block ............5 Installing the Terminal Cover ..............6 Extended Parameters for RS-485/Modbus RTU ....7 Parameter Menu ..................7 Modbus Protocol Details .............9 Data Transmission ..................9...

  • Page 4: Safety Information

    Safety information Safety information General Some parts of Lenze controllers (frequency inverters, servo inverters, DC controllers) can be live, moving and rotating. Some surfaces can be hot. Non-authorized removal of the required cover, inappropriate use, and incorrect installation or operation creates the risk of severe injury to personnel or damage to equipment.
  • Page 5 Safety information DANGER! • After the controller has been disconnected from the supply voltage, live components and power connection must not be touched immediately, since capacitors could be charged. Please observe the corresponding notes on the controller. • Do not continuously cycle input power to the controller more than once every three minutes.

  • Page 6: Introduction

    Introduction Introduction This reference guide assumes that the reader has a working knowledge of the Modbus RTU Protocol and familiarity with the programming and operation of motion control equipment. This guide is intended as a reference only. Overview Modbus is an internationally accepted asynchronous serial protocol designed for commercial and industrial automation applications.

  • Page 7: Installation

    Installation Installation Installing the Module into the Terminal Cover 1 2 3 4 5 0.5 Nm/ 4.5 lb-in < _ 2.8 mm² (12-22 AWG) RS-485 / Modbus RTU terminal block Terminal Description Important For reliable communication make sure terminal is connected to the Modbus network Earth ground / shield GND/common.

  • Page 8: Installing The Terminal Cover

    Installation Installing the Terminal Cover ENGLISH...

  • Page 9: Extended Parameters For Rs-485/Modbus Rtu

    Commissioning Extended Parameters for RS-485/Modbus RTU In addition to the drive parameters that are detailed in the Installation and Operation manual, the installation of the RS485/Modbus RTU module will give access to the 400 series parameters that are exclusive to this communication module. Parameter Menu Code Possible Settings...
  • Page 10 Commissioning Code Possible Settings IMPORTANT Name Default Selection RS485/Modbus: System bus parameters Network address 247 The Drive does not support the Modbus P410 “broadcast” function. Network 0 2400 bps P411 Baud Rate 1 4800 bps 2 9600 bps 3 19200 bps 4 38400 bps 5 57600 bps 6 115200 bps...

  • Page 11: Modbus Protocol Details

    Commissioning Modbus Protocol Details Data Transmission This drive uses the RTU (Remote Terminal Unit) transmission mode of the Modbus Protocol and operates as a Slave device on the network. All devices communicating with the drive(s) must be a Modbus Master. Register Numbering Modbus 3X and 4X register numbers are always one greater than the actual drive register numbers.

  • Page 12: Modbus Message Details

    Commissioning In some instances, multiple words can be read for a single register. When this is done for the registers below, the response from the drive will be for the number of words, rather than the number of registers, requested: •...

  • Page 13: Register Reading

    Commissioning Register Reading 6.1.1 Message structure for reading one 16-bit register All registers except #1 CRCH CRCL CRCH CRCL 6.1.2 Message structure for reading two 16-bit registers Registers 32, 60 and 64 only CRCH CRCL CRCH CRCL D1H and D1L are the high and low bytes of the first 16-bit register value (32, 60, 64) D2H and D2L are the high and low bytes of the second 16-bit register value (33, 61, 65)

  • Page 14: Register Writing

    Commissioning 6.1.4 Message structure for reading one 4 word register Register 500 only CRCH CRCL CRCH CRCL D1 holds the value of Fault 1 (the most recent fault in the fault history) D2 holds the value of Fault 2 in the fault history …...

  • Page 15: No Response Conditions

    Commissioning No Response Conditions The drive will not respond to any message that… • contains one or more parity errors • has an invalid CRC value • was not directed to the drive’s network address. This drive does not support the broadcast function of the Modbus protocol. •...

  • Page 16: Commissioning

    Commissioning Commissioning Drive Monitoring The network can always read drive parameters as long as the Modbus communications are enabled (i.e. P400 = 2) and configured properly (see P410-412). Drive Programming and Control Network Control must be enabled for the network to program drive parameters or take control of an actual drive.

  • Page 17: Network Watchdog Timer

    Commissioning When the Lock Security (bit 1) is set, the drive drops out of NETWORK control and switches to the normal source of control. If P100 = 3 (NETWORK ONLY) and the drive is running, the drive will also be stopped (according to P111). Drive parameters and status registers can always be read, even when P100=2,5 and/or drive control and parameters are locked.

  • Page 18: Typical Network Applications

    Commissioning Typical Network Applications Controlling the Drive (e.g. starting the drive) The following is the sequence of events for starting the drive via the network: 1) Unlock the Drive Control register (#1) by writing a 0 (or the drive password) to Register #48.

  • Page 19: Drive Registers

    Commissioning 3) Modify the appropriate NETWORK setpoint register. Register #44 - Network Speed Command Register #45 - Network PID Setpoint Command Register #46 - Network Torque Command 4) Lock Control when drive operations are complete by writing a 0x0002 (i.e. setting the Lock Security bit) to Register #1.
  • Page 20 Commissioning Reg # Register Name Default Range of Adjustment Important Total kWh (low word) Read only. See P511 in drive manual Total kWh (high word) Actual PID setpoint -999.0 … 3100.0 Read only. See section 9.2.8 PID Setpoint Command -999.0 … 3100.0 Read only.
  • Page 21 Commissioning 9.2.1 Register #1 (Drive Control) Quick Stop Lock Security STOP drive (P111) Start drive Inhibit Network Reference Off Set Reverse Set Forward Stop Forcing Manual Reference Force Manual Reference (P101) DC Braking ON DC Braking OFF Network Reference (enumeration): Network Reference OFF (used only when bit 5 is set) AUTO: Keypad AUTO: 0-10VDC...
  • Page 22 Commissioning 9.2.2 Register #21 (Drive Size): This register returns an index value that is associated with the voltage and power rating of the drive as can be found in the drive configuration table below: Index Input Voltage Power Rating 240 VAC, Single-Phase 0.33 HP (0.25 kW) 1.5 HP (1.1 kW) 240 VAC...
  • Page 23 Commissioning 9.2.3 Register #23 (Drive Status) 0 = STOP 1 = RUN 0 = Quick Stop not active 1 = Quick Stop active 0 = Direction Forward 1 = Reverse (commanded direction) 0 = Direction Forward 1 = Reverse (actual direction) 0 = Network Reference not active 1 = Network Ref., sets active source 0 = Network Enable not active...
  • Page 24 Commissioning 9.2.5 Register #27 (Actual Direction and Control Mode) The high byte (DH) of register 27 provides the actual rotational direction of the motor: 0 = Forward 1 = Reverse The low byte (DL) of register 27 provides the Control Mode: Value Control Mode Description...
  • Page 25 Commissioning 9.2.7 Register #29 (Present Fault and Commanded Direction) The high byte (DH) of register 29 provides the active Fault Message: Value Fault Message Value Fault Message No Fault Internal Fault 3 [F.F3] TMP Output Fault Internal Fault 5 [F.F5] Output (Transistor) Fault [F.OF] Internal Fault 5 [F.F5] Ground Fault [F.OF1]...
  • Page 26 Commissioning 9.2.10 Register #70 (Network Controlled Digital Output) To control the state of the relay or digital output (TB14), Drive Programming Parameter P140 and/or P142 must be set to 25 (Network Controlled). 9.2.11 Register #71 (Network Controlled Analog Output) To control the state of the analog output (TB30), Drive Programming Parameter P150 must be set to 09 (Network Controlled).

  • Page 27: Programming Parameters

    Commissioning Programming Parameters Registers #100-399 are programming parameters used to set up the drive for a specific application. For details regarding these registers, refer to the Operating Instructions that accompanied the drive. Registers #400-499 are communication specific programming parameters and will vary depending on which, if any, of the optional communication modules is installed in the drive.

  • Page 28: Keypad Status (P531)

    Commissioning 10.3 Keypad Status (P531) When a read command is issued over the Modbus network to Programming Parameter P531 (register #531), the Keypad Status data returned can be interpreted as follows: UP Push-button State Unused DOWN Push-button State Unused MODE Push-button State Unused FWD/REV Push-button State Unused...

  • Page 29: Troubleshooting And Fault Elimination

    Appendix Troubleshooting and Fault Elimination 11.1 Faults Status Cause Remedy f.ntf Module to Drive communication Connection between drive and Check cable and connection time out module is not made. between module and drive F.nF1 Network Time-out Fault Drive under NETWORK control See parameters P425, P426 and network communications have been lost.
  • Page 30 AC Technology Corporation • 630 Douglas Street • Uxbridge, MA 01569 • USA +1 (508) 278-9100 www.actech.com Document CMVMB401B...

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