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Table of Contents
I/O Modbus Slave..................................................................... 292
Modbus Serial Application Connected to the Serial Port................. 292
Modbus Serial Application Connected to the Network..................... 292
Modbus TCP Application..................................................................... 293
Modbus I/O Access.................................................................. 293
Function Codes ....................................................................................293
I/O Coil/Register Descriptions............................................................. 294
Serial Port Coil/Register Descriptions................................................ 295
A4/T4 Registers ....................................................................................295
A4D2/A4R2 Registers........................................................................... 296
D4/D2R2 Registers ...............................................................................297
Serial Pin Signals .................................................................................297
TruePort I/O ..............................................................................298
TruePort/Modbus Combination........................................................... 298
API Over TruePort Only .......................................................................299
Accessing I/O Data Via TruePort............................................ 300
Introduction...........................................................................................300
Setup......................................................................................................300
Format of API Commands ...................................................................301
Get Commands..................................................................................... 301
Command Format............................................................................ 301
Response Format............................................................................. 301
Set Commands .....................................................................................302
Command Format............................................................................ 302
Successful Response Format.......................................................... 303
Unsuccessful Response Format...................................................... 303
Error Codes........................................................................................... 304
I/O SNMP Traps........................................................................ 304
Chapter 11 Configuring Clustering................................305
Introduction.............................................................................. 305
Clustering Slave List ............................................................... 305
Overview................................................................................................305