Related Manuals for A&D AD-8551R
Summary of Contents for A&D AD-8551R
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- Page 2 This manual and Marks All safety messages are identified by the following, “WARNING” or “CAUTION”, of ANSI Z535.4 (American National Standard Institute: Product Safety Signs and Labels). The meanings are as follows: A potentially hazardous situation which, if not avoided, WARNING could result in death or serious injury.
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Page 3: Table Of Contents
Contents 1. Introduction ................................2 Features ................................2 Cautions ................................3 2. Composition and Names ............................4 AD-8551R ................................4 Accessories ..............................4 3. Specifications ................................5 Dimensions ..............................5 Applicable models ............................6 4. Power Terminal ..............................7 Power-supply voltage ............................7 Connecting example ............................8 Internal connection status..........................8 5. RS-485 Interface ..............................9 RS-485 specifications ............................9... -
Page 4: Introduction
(RS-232C/RS-485 converter). Use of the RS-485 enables the collection of data control of up to 31 weighing devices (addresses ranging from 1 to 63) by a single PLC. ■The RS-485 communication method of the AD-8551R can be used by selecting either Modbus RTU communication (Modbus RTU mode) or ASCII code command communication (command mode). -
Page 5: Cautions
Before use, confirm the following articles for safe operation. Grounding The Convertor Be sure to ground this convertor. (For the internal connection status of AD-8551R, refer to “4-3 Internal connection status”. Separate this earth ground line from others, like ground line of a motor, inverter or a power source. Unless the convertor is grounded, it may result in receiving an electric shock, cause operation error or catch fire. -
Page 6: Composition And Names
2. Composition and Names AD-8551R Front panel side Rear panel side DIN rail hook LED (Status display part) DIN rail groove Vent hole RS-485 connector Switch Vent hole RS-232C connector Pull down when removing from DIN rail DC power connector... -
Page 7: Specifications
3. Specifications Voltage requirement ：12 to 24 VDC [+ 10%, -15%] Power requirement：2W Max Communication interface：RS-485 (Modbus RTU or command for connection to control equipment) Refer to “5-1 RS-485 specifications” :RS-232C interface (For connection to weighing device) Refer to “6-1 RS-232C specifications” Communication connector：... -
Page 8: Applicable Models
Applicable models ■Functions available for each model, accessories needed for connection to AD8551R. Accessories needed to connect the AD8551R Modbus RTU Convenient functions to a weighing device Command Data that can be read from the host Operations that can be made from the host Cable needed for Power supply mode... -
Page 9: Power Terminal
4. Power Terminal When connected to the AD-4212C / AD-4212D, power can be supplied from the weighing instrument (RS-232C connector). No power connecting is required (Refer to “6. RS-232C Interface”). Power-supply voltage Connect a constant voltage of external power supply (+ 10% -15%) within the range of 12 to 24 VDC to the DC power input terminal. -
Page 10: Connecting Example
0.25 mm to 1.5 mm Bar crimp terminal (With color) DIN 46228 Part 4 0.25 mm to 0.75 mm Length 8 mm Internal connection status AD-8551R RS-485 SLD(5) Spring pin RS-232C Din rail connection Shell DC power input terminal Approx. 820kΩ... -
Page 11: Rs-485 Interface
5. RS-485 Interface RS-485 specifications ■Connector (Made by 3M 35605-5153-A00) Shield ⋆１ ５ ４ Signal ground ３ ２ DATA- Input/Output Send / Receive data １ DATA+ Input/Output Send / Receive data ⋆１． Connect the shield of the RS-485 cable. The shield terminal is connected to the DC power input terminal FG, RS-232C connector shell, and DIN rail connection spring connector. -
Page 12: Connections
Connections ■How to connect ③Branching connector ① RS-485 connector (power clamp wire mount socket) ②RS-485 cable Single connection Multi drop connection Item Description Accessory ① RS-485 connector Model: AX-35505-6200-A ○ (power clamp wire mount socket) (Made by 3M 35505-6200-A00) （1 piece） Recommended specification ・Twisted pair cable with shield ②... -
Page 13: Rs-232C Interface
Inch screw (Va) Input Input of power supply 12V ⋆１ Shell Shield ⋆１．When connected to the AD-4212C / AD-4212, the AD-8551R can be operated by supplying power from the weighing device. ■Communication specifications Item Setting Baud rate [SW-1 No.1, 2]... -
Page 14: Switch
・Set the parameters required for communication using the AD-8551R switches (SW-1 to 5). Caution ・If the setting is changed, be sure to turn on the power off and on again of AD-8551R. When the power is turned on, the switch status is read and applied to operations... -
Page 15: Rs-485 Function Settings
“1” “0” SW-1 ■Settings for the RS-485 communication method The RS-485 communication method of the AD-8551R can be selected from two types: communication using Modbus RTU (Modbus RTU mode) and communication using ASCII code (command mode). SW-2 No.3 RS-485 communication... - Page 16 ■Device address allocation Allocate a device address for each AD-8551R. Device address allocation can be set from 01 to 63 using switches (SW-3, 4). SW-2 No. 4, ADDRESS Setting status Device Address SW-3 SW-4 Setting prohibited SW-4 “1” “0” SW-3...
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Page 17: Rs-232C Function Settings
■Terminating resistor selection SW-5 No.1 Terminating Resistor Setting status “1” No terminating resistor “0” With terminating resistor (Between [DATA+] and SW-5 [DATA－] is 100Ω) Example when several units are connected. Connect termination resistors only at the ends of the network. (ground) (ground) Weighing... -
Page 18: Fixed Decimal Point Function
Fixed decimal point function ・The fixed decimal point function is valid only in Modbus RTU mode. ・If the connected weighing device has a smart range function, the number of digits after the decimal point is automatically changed. If you want to fix the number of digits, use the fixed decimal point function. Example of storage format with fixed decimal point function AD8551R internal data Decimal point... -
Page 19: Led (Status, Error Display)
Flashes when the AD-8551R receives data from the weighing device. Green Flashes when the AD-8551R is transmitting data to the host. Flashes when the AD-8551R is receiving data from the host (PLC, PC, Orange etc.) ■RUN Flashes status (Error display) -
Page 20: Communicaiton In Modbus Rtu Mode
⋆１．When changing the weight value to be used, refer to the instruction manual of the individual weighing device. ■Notes on Modbus RTU communication with AD-8551R. ・The function codes and maximum number that can be supported by AD-8551R are as follows. Code... -
Page 21: Preparing For Communication
（stream mode*） ＊AD-8551R factory setting (normally, the factory setting of AD-4212C / AD-4212D is the same.) ② Set the following setting items so that the RS-485 of the host (PLC, PC, etc.) and AD-8551R are the same. Setting item Host（PLC, PC.etc）... -
Page 22: Data Address
2008 “Z” command output ⋆１．When “1” is written, the AD-8551R outputs each command to the connected weighing device and returns the Coil status to “0”. “0” is output when performing reading. ⋆２．The operation differs depending on the weighing device. Refer to “3-2 Applicable models” or the operation manual of the individual weighing device for the operation with that weighing device. -
Page 23: Detailed Information On Holding Register 1
Detailed information on Holding Register 1 ■Weighing value (Holding Register: 40 2001 to 2002), decimal point position (Holding Register :40 2005 to 2006) Example of weighing value and decimal point position value by weighing device output. (When the decimal point position by SW-5 is set to AUTO.) Data address Output value Data... -
Page 24: Detailed Information On Holding Register 2 （Only For Ad-4212C/Ad-4212D
Detailed information on Holding Register 2 （only for AD-4212C/AD-4212D） The following items change only when connected to the the AD-4212C / AD-4212D. When connected to another measuring instrument, they will be the initial values. ■Response characteristics (Holding Register: 40 2015 to 2016) Value Response characteristic status ⋆1... -
Page 25: Communication Format
■When writing to Coil Operation details Write 1 to Coil 00 2004 of the AD-8551R where device address is 01 (Rezero instruction to the weighing instrument). Sent from the master Field name... - Page 26 Holding Register read communication example ■ How to operate Read 40 2001 to 2002 Holding Register of the AD-8551R where device address is 01 (Read the weighing value of the weighing device). Sent from the master Field name Example (Hexadecimal)
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Page 27: Operating Example (When Connected To The Ad-4212C/Ad-4212D)
Operating example (When connected to the AD-4212C/AD-4212D) This is the procedure for basic operation of the weighing device in Modbus RTU communication. ■Reading weighing value Applicable Holding Register Coil address address Procedure Contents Modbus RTU access method Status confirmation contents AD-4212C AD-4212D ()data length... - Page 28 ■Example of calibration (sensitivity adjustment) with external weight（Possible only with AD-4212C／AD-4212D） Coil address Holding Register address Procedure Contents Modbus RTU access method Status confirmation contents AD-4212C AD-4212D () data lengh Instruct start calibration mode Set “1” to the applicable Coil 00 2002 00 2001 Confirm calibration mode...
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Page 29: Communication In Command Mode
⋆２．With the AD-4212C, it is necessary to change the data output mode. （Refer to the individual device instruction manual for how to change.） ② Set the following setting items so that the RS-485 of the host (PLC, PC, etc.) and AD-8551R are the same. Setting item Host（PLC, PC.etc）... -
Page 30: Communication Format
Communication format ・Format sent from the host (PLC, PC, etc.). Add “@**” (“**” is the device address 01 to 63 set with AD-8551R) before the command you want to send to the weighing device. The AD-8551R with the matching device address outputs the command part excluding “@**” to the weighing device (RS-232C) side. -
Page 31: Troubleshooting
・ Is the weighing device output format set to the A&D standard format. AD-8551R settings cannot be Turn the AD-8551R off and the on again. When the power is turned on, the switch changed. status is read and reflected in the operation. -
Page 32: Command Mode Communication Check
・Is the data output mode of the other weighing device set to key mode? AD-8551R settings cannot be Turn the AD-8551R off and the on again. When the power is turned on, the changed. switch status is read and reflected in the operation. - Page 33 3-23-14 Higashi-Ikebukuro, Toshima-ku, Tokyo 170-0013, JAPAN Telephone: [81] (3) 5391-6132 Fax: [81] (3) 5391-1566 A&D ENGINEERING, INC. 1756 Automation Parkway, San Jose, California 95131, U.S.A. Telephone: [1] (408) 263-5333 Fax: [1] (408)263-0119 A&D INSTRUMENTS LIMITED Unit 24/26 Blacklands Way, Abingdon Business Park, Abingdon, Oxfordshire OX14 1DY United Kingdom Telephone: [44] (1235) 550420 Fax: [44] (1235) 550485 A&D AUSTRALASIA PTY LTD...