ProSoft Technology MVI56E-MNETCR - Manual (Page 6)

Contents MVI56E-MNETCR ♦ ControlLogix Platform
User Manual Modbus TCP/IP Multi Client Enhanced Communications Module for Remote Chassis
Page 6 of 159 ProSoft Technology, Inc.
June 14, 2011
4 Diagnostics and Troubleshooting 79
4.1 LED Status Indicators ............................................................................................. 80
4.1.1 Scrolling LED Status Indicators .............................................................................. 80
4.1.2 Ethernet LED Indicators .......................................................................................... 81
4.1.3 Non-Scrolling LED Status Indicators ...................................................................... 81
4.1.4 Troubleshooting ...................................................................................................... 82
4.1.5 Clearing a Fault Condition ...................................................................................... 83
4.2 Using the Diagnostics Menu in ProSoft Configuration Builder ............................... 84
4.2.1 The Diagnostics Menu ............................................................................................ 87
4.2.2 Monitoring Module Information ............................................................................... 87
4.2.3 Monitoring Backplane Information .......................................................................... 88
4.2.4 Monitoring MNET Client Information....................................................................... 89
4.2.5 Monitoring Database Information............................................................................ 90
4.3 Reading Status Data from the Module ................................................................... 91
5 Reference 93
5.1 Product Specifications ............................................................................................ 94
5.1.1 General Specifications ............................................................................................ 94
5.1.2 Functional Specifications ........................................................................................ 95
5.1.3 Hardware Specifications ......................................................................................... 96
5.2 Functional Overview ............................................................................................... 97
5.2.1 About the MODBUS/TCP Protocol ......................................................................... 97
5.2.2 Backplane Data Transfer ........................................................................................ 98
5.2.3 Special Function Blocks ........................................................................................ 102
5.3 Data Flow between MVI56E-MNETCR Module, Processor, and Network .......... 111
5.3.1 Client Driver .......................................................................................................... 112
5.3.2 Client Command List ............................................................................................ 113
5.3.3 Client Command Errors ........................................................................................ 113
5.4 Ethernet Cable Specifications ............................................................................... 116
5.4.1 Ethernet Cable Configuration ............................................................................... 116
5.4.2 Ethernet Performance ........................................................................................... 117
5.5 Modbus Protocol Specification ............................................................................. 118
5.5.1 Read Coil Status (Function Code 01) ................................................................... 118
5.5.2 Read Input Status (Function Code 02) ................................................................. 120
5.5.3 Read Holding Registers (Function Code 03) ........................................................ 121
5.5.4 Read Input Registers (Function Code 04) ............................................................ 122
5.5.5 Force Single Coil (Function Code 05) .................................................................. 123
5.5.6 Preset Single Register (Function Code 06) .......................................................... 124
5.5.7 Diagnostics (Function Code 08) ........................................................................... 125
5.5.8 Force Multiple Coils (Function Code 15) .............................................................. 127
5.5.9 Preset Multiple Registers (Function Code 16) ...................................................... 128
5.5.10 Modbus Exception Responses ............................................................................. 129
5.6 Using the Optional Add-On Instruction Rung Import ............................................ 132
5.6.1 Before You Begin .................................................................................................. 132
5.6.2 Overview ............................................................................................................... 132
5.6.3 Installing the Rung Import with Utility Add-On Instruction .................................... 133
5.6.4 Reading the Ethernet Settings from the Module................................................... 138
5.6.5 Writing the Ethernet Settings to the Module ......................................................... 139
5.6.6 Reading the Clock Value from the Module ........................................................... 140
5.6.7 Writing the Clock Value to the Module ................................................................. 141
5.7 Adding the Module to an Existing Project ............................................................. 142