ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 7)

MVI56E-MCM ♦ ControlLogix Platform Contents
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 7 of 199
June 18, 2014
6.1.3 Functional Specifications....................................................................................... 116
6.1.4 Hardware Specifications........................................................................................ 117
6.2 Functional Overview .............................................................................................. 118
6.2.1 About the Modbus Protocol ................................................................................... 118
6.2.2 Backplane Data Transfer....................................................................................... 118
6.2.3 Normal Data Transfer ............................................................................................ 120
6.2.4 Special Function Blocks ........................................................................................ 122
6.2.5 Data Flow Between MVI56E-MCM Module and ControlLogix Processor ............. 134
6.3 Cable Connections ................................................................................................ 138
6.3.1 Ethernet Cable Specifications ............................................................................... 138
6.3.2 Ethernet Cable Configuration ................................................................................ 139
6.3.3 Ethernet Performance ........................................................................................... 139
6.3.4 RS-232 Application Port(s) ................................................................................... 140
6.3.5 RS-422 .................................................................................................................. 142
6.3.6 RS-485 Application Port(s) .................................................................................... 142
6.3.7 DB9 to RJ45 Adaptor (Cable 14) .......................................................................... 143
6.4 MVI56E-MCM Database Definition ....................................................................... 143
6.5 MVI56E-MCM Configuration Data ......................................................................... 144
6.5.1 Backplane Setup ................................................................................................... 144
6.5.2 Port 1 Setup .......................................................................................................... 145
6.5.3 Port 2 Setup .......................................................................................................... 147
6.5.4 Port 1 Commands ................................................................................................. 150
6.5.5 Port 2 Commands ................................................................................................. 150
6.5.6 Misc. Status ........................................................................................................... 150
6.5.7 Command Control ................................................................................................. 152
6.6 MVI56E-MCM Status Data Definition .................................................................... 152
6.7 MVI56E-MCM User Defined Data Types .............................................................. 154
6.7.1 MCMModuleDef .................................................................................................... 154
6.7.2 MCMCONFIG ........................................................................................................ 154
6.7.3 MCMDATA ............................................................................................................ 157
6.7.4 MCMSTATUS ........................................................................................................ 157
6.7.5 MCMCONTROL .................................................................................................... 158
6.7.6 Util ......................................................................................................................... 158
6.8 Modbus Protocol Specification .............................................................................. 160
6.8.1 Commands Supported by the Module ................................................................... 160
6.8.2 Read Coil Status (Function Code 01) ................................................................... 161
6.8.3 Read Input Status (Function Code 02) .................................................................. 162
6.8.4 Read Holding Registers (Function Code 03) ........................................................ 163
6.8.5 Read Input Registers (Function Code 04) ............................................................. 164
6.8.6 Force Single Coil (Function Code 05) ................................................................... 165
6.8.7 Preset Single Register (Function Code 06) ........................................................... 166
6.8.8 Diagnostics (Function Code 08) ............................................................................ 167
6.8.9 Force Multiple Coils (Function Code 15) ............................................................... 169
6.8.10 Preset Multiple Registers (Function Code 16) ...................................................... 170
6.8.11 Modbus Exception Responses .............................................................................. 170
6.9 Using the Optional Add-On Instruction .................................................................. 172
6.9.1 Before You Begin .................................................................................................. 172
6.9.2 Overview................................................................................................................ 172
6.9.3 Importing the Utility Add-On Instruction ................................................................ 173
6.9.4 Reading the Ethernet Settings from the Module ................................................... 176
6.9.5 Writing the Ethernet Settings to the Module.......................................................... 177
6.9.6 Reading the Clock Value from the Module ............................................................ 179
6.9.7 Writing the Clock Value to the Module .................................................................. 179
6.10 Using the Sample Program - RSLogix 5000 Version 15 and earlier ..................... 180