ProSoft Technology MVI56E-MNET/MNETXT - Manual (Page 6)

Contents MVI56E-MNET / MNETXT ♦ ControlLogix Platform
User Manual Modbus TCP/IP Interface Module
Page 6 of 181 ProSoft Technology, Inc.
April 23, 2014
3.3 Using Controller Tags ............................................................................................. 79
3.4 Controller Tag Overview ......................................................................................... 80
3.4.1 MNET.DATA ........................................................................................................... 80
3.4.2 MNET.STATUS....................................................................................................... 83
3.4.3 MNET.CONTROL ................................................................................................... 84
3.4.4 MNET.UTIL ............................................................................................................. 85
4 Diagnostics and Troubleshooting 87
4.1 LED Status Indicators ............................................................................................. 88
4.1.1 Scrolling LED Status Indicators .............................................................................. 88
4.1.2 Ethernet LED Indicators .......................................................................................... 89
4.1.3 Non-Scrolling LED Status Indicators ...................................................................... 90
4.1.4 Troubleshooting ...................................................................................................... 91
4.1.5 Clearing a Fault Condition ...................................................................................... 91
4.2 Using the Diagnostics Menu in ProSoft Configuration Builder ............................... 92
4.2.1 Connecting to the Module's Web Page .................................................................. 95
4.2.2 The Diagnostics Menu ............................................................................................ 96
4.2.3 Monitoring Module Information ............................................................................... 96
4.2.4 Monitoring Backplane Information .......................................................................... 97
4.2.5 Monitoring MNET Client Information....................................................................... 98
4.2.6 Monitoring MNET Server Information ..................................................................... 99
4.2.7 Monitoring Database Information.......................................................................... 100
4.3 Reading Status Data from the Module ................................................................. 101
4.3.1 Status Data Definition ........................................................................................... 102
4.3.2 Configuration Error Word ...................................................................................... 104
4.3.3 Client Command Errors ........................................................................................ 105
5 Reference 107
5.1 Product Specifications .......................................................................................... 107
5.1.1 General Specifications .......................................................................................... 108
5.1.2 Modbus TCP/IP Specifications ............................................................................. 108
5.1.3 Hardware Specifications ....................................................................................... 109
5.2 Backplane Data Transfer ...................................................................................... 110
5.2.1 Normal Data Transfer Blocks ................................................................................ 113
5.2.2 Special Function Blocks ........................................................................................ 119
5.3 Data Flow between the MVI56E-MNET Module and ControlLogix Processor ..... 131
5.3.1 Server Driver ......................................................................................................... 132
5.3.2 Client Driver .......................................................................................................... 134
5.4 Ethernet Cable Specifications ............................................................................... 136
5.4.1 Ethernet Cable Configuration ............................................................................... 136
5.4.2 Ethernet Performance ........................................................................................... 137
5.5 Modbus Protocol Specification ............................................................................. 138
5.5.1 About the MODBUS TCP/IP Protocol ................................................................... 138
5.5.2 Read Coil Status (Function Code 01) ................................................................... 139
5.5.3 Read Input Status (Function Code 02) ................................................................. 140
5.5.4 Read Holding Registers (Function Code 03) ........................................................ 141
5.5.5 Read Input Registers (Function Code 04) ............................................................ 142
5.5.6 Force Single Coil (Function Code 05) .................................................................. 143
5.5.7 Preset Single Register (Function Code 06) .......................................................... 144
5.5.8 Read Exception Status(Function Code 7) ............................................................ 144
5.5.9 Diagnostics (Function Code 08) ........................................................................... 145