MVI56E-MNETCR ♦ ControlLogix™ Platform Start Here
Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis User Manual
ProSoft Technology, Inc. Page 5 of 143
4 Diagnostics and Troubleshooting 72
4.1 LED Status Indicators ......................................................................... 72
4.1.1 Scrolling LED Status Indicators .......................................................... 72
4.1.2 Ethernet LED Indicators ...................................................................... 73
4.1.3 Non-Scrolling LED Status Indicators .................................................. 73
4.1.4 Clearing a Fault Condition .................................................................. 74
4.1.5 Troubleshooting .................................................................................. 74
4.2 Using the Diagnostics Menu in ProSoft Configuration Builder ........... 75
4.2.1 Connecting to the Module's Webpage ................................................ 78
4.2.2 The Diagnostics Menu ........................................................................ 79
4.2.3 Monitoring Module Information ........................................................... 79
4.2.4 Monitoring Backplane Information ...................................................... 80
4.2.5 Monitoring Database Information ....................................................... 81
4.2.6 Monitoring MNET Client Information .................................................. 82
4.3 Reading Status Data from the Module ............................................... 83
4.3.1 Status Data Definition ......................................................................... 83
4.3.2 Configuration Error Word .................................................................... 85
4.3.3 Client Command Errors ...................................................................... 86
5 Reference 88
5.1 Product Specifications ........................................................................ 88
5.1.1 General Specifications ........................................................................ 88
5.1.2 Functional Specifications .................................................................... 89
5.1.3 Hardware Specifications ..................................................................... 89
5.2 Backplane Data Transfer .................................................................... 90
5.2.1 Normal Data Transfer Blocks .............................................................. 92
5.2.2 Special Function Blocks ...................................................................... 94
5.3 Data Flow between MVI56E-MNETCR, Processor, and Network .... 104
5.3.1 Client Driver ...................................................................................... 105
5.3.2 Client Command List ........................................................................ 106
5.4 Ethernet Cable Specifications........................................................... 107
5.4.1 Ethernet Cable Configuration ........................................................... 107
5.4.2 Ethernet Performance ....................................................................... 107
5.5 Modbus Protocol Specification ......................................................... 108
5.5.1 About the Modbus Protocol .............................................................. 108
5.5.2 Read Coil Status (Function Code 01) ............................................... 109
5.5.3 Read Input Status (Function Code 02) ............................................. 110
5.5.4 Read Holding Registers (Function Code 03) .................................... 111
5.5.5 Read Input Registers (Function Code 04) ........................................ 112
5.5.6 Force Single Coil (Function Code 05) .............................................. 113
5.5.7 Preset Single Register (Function Code 06) ...................................... 114
5.5.8 Diagnostics (Function Code 08) ....................................................... 115
5.5.9 Force Multiple Coils (Function Code 15) .......................................... 117
5.5.10 Preset Multiple Registers (Function Code 16) .................................. 118
5.5.11 Modbus Exception Responses ......................................................... 119
5.6 Using the Optional Add-On Instruction Rung Import ........................ 121
5.6.1 Before You Begin .............................................................................. 121
5.6.2 Overview ........................................................................................... 121
5.6.3 Installing the Rung Import with Utility Add-On Instruction ................ 122
5.6.4 Reading the Ethernet Settings from the Module .............................. 127
5.6.5 Writing the Ethernet Settings to the Module ..................................... 128
5.6.6 Reading the Clock Value from the Module ....................................... 129
5.6.7 Writing the Clock Value to the Module ............................................. 130