Table of Contents
16 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
Modbus TCP Application .....................................................................278
Modbus I/O Access ..................................................................278
Function Codes.....................................................................................278
I/O Coil/Register Descriptions .............................................................279
Serial Port Coil/Register Descriptions................................................280
A4/T4 Registers.....................................................................................280
A4D2/A4R2 Registers...........................................................................281
D4/D2R2 Registers................................................................................282
Serial Pin Signals..................................................................................282
TruePort I/O...............................................................................283
TruePort/Modbus Combination...........................................................283
API Over TruePort Only........................................................................284
Accessing I/O Data Via TruePort.............................................285
Introduction...........................................................................................285
Setup......................................................................................................285
Format of API Commands....................................................................286
Get Commands .....................................................................................286
Command Format............................................................................. 286
Response Format............................................................................. 286
Set Commands......................................................................................287
Command Format............................................................................. 287
Successful Response Format........................................................... 288
Unsuccessful Response Format....................................................... 288
Error Codes...........................................................................................289
I/O SNMP Traps.........................................................................289
Chapter 11 Configuring Clustering................................291
Introduction...............................................................................291
Clustering Slave List................................................................291
Overview................................................................................................291
Adding Clustering Slaves ....................................................................292
Overview........................................................................................... 292
Field Descriptions............................................................................. 292
Advanced Clustering Slave Options...................................................293