
Contents MVI56E-MNETCR ♦ ControlLogix Platform
User Manual Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis
Page 6 of 161 ProSoft Technology, Inc.
3.4.4 MNETCR.UTIL........................................................................................................ 83
4Diagnostics and Troubleshooting 85
4.1 LED Status Indicators............................................................................................. 86
4.1.1 Scrolling LED Status Indicators.............................................................................. 86
4.1.2 Ethernet LED Indicators.......................................................................................... 87
4.1.3 Non-Scrolling LED Status Indicators ...................................................................... 87
4.1.4 Clearing a Fault Condition ...................................................................................... 88
4.1.5 Troubleshooting...................................................................................................... 88
4.2 Using the Diagnostics Menu in ProSoft Configuration Builder ............................... 89
4.2.1 Connecting to the Module's Web Page .................................................................. 92
4.2.2 The Diagnostics Menu............................................................................................ 93
4.2.3 Monitoring Module Information............................................................................... 93
4.2.4 Monitoring Backplane Information.......................................................................... 94
4.2.5 Monitoring Database Information............................................................................ 94
4.2.6 Monitoring MNET Client Information....................................................................... 95
4.3 Reading Status Data from the Module ................................................................... 97
4.3.1 Status Data Definition............................................................................................. 97
4.3.2 Configuration Error Word........................................................................................ 99
4.3.3 Client Command Errors .......................................................................................... 99
5Reference 103
5.1 Product Specifications .......................................................................................... 104
5.1.1 General Specifications.......................................................................................... 104
5.1.2 Functional Specifications...................................................................................... 105
5.1.3 Hardware Specifications....................................................................................... 105
5.2 Backplane Data Transfer...................................................................................... 106
5.2.1 Normal Data Transfer Blocks................................................................................ 108
5.2.2 Special Function Blocks........................................................................................ 110
5.3 Data Flow between MVI56E-MNETCR, Processor, and Network........................ 120
5.3.1 Client Driver.......................................................................................................... 121
5.3.2 Client Command List ............................................................................................ 122
5.4 Ethernet Cable Specifications............................................................................... 123
5.4.1 Ethernet Cable Configuration ............................................................................... 123
5.4.2 Ethernet Performance........................................................................................... 124
5.5 Modbus Protocol Specification ............................................................................. 125
5.5.1 About the MODBUS/TCP Protocol....................................................................... 125
5.5.2 Read Coil Status (Function Code 01)................................................................... 125
5.5.3 Read Input Status (Function Code 02)................................................................. 126
5.5.4 Read Holding Registers (Function Code 03)........................................................ 127
5.5.5 Read Input Registers (Function Code 04)............................................................ 128
5.5.6 Force Single Coil (Function Code 05) .................................................................. 129
5.5.7 Preset Single Register (Function Code 06).......................................................... 130
5.5.8 Diagnostics (Function Code 08) ........................................................................... 131
5.5.9 Force Multiple Coils (Function Code 15) .............................................................. 132
5.5.10 Preset Multiple Registers (Function Code 16)...................................................... 133
5.5.11 Modbus Exception Responses............................................................................. 134
5.6 Using the Optional Add-On Instruction Rung Import............................................ 137
5.6.1 Before You Begin.................................................................................................. 137
5.6.2 Overview............................................................................................................... 137
5.6.3 Installing the Rung Import with Utility Add-On Instruction .................................... 138
5.6.4 Reading the Ethernet Settings from the Module................................................... 142