ProSoft Technology MVI69E-MBTCP - Page 6

Contents MVI69E-MBTCP ♦ CompactLogix Platform
User Manual Modbus TCP/IP Enhanced Communication Module
Page 6 of 150 ProSoft Technology, Inc.
June 28, 2017
4.3 Normal Data Transfer ............................................................................................. 65
4.3.1 Write Block: Request from the Processor to the Module ........................................ 65
4.3.2 Read Block: Response from the Module to the Processor ..................................... 65
4.3.3 Read and Write Block Transfer Sequences ........................................................... 66
4.4 Data Flow Between the Module and Processor ..................................................... 70
4.4.1 Server Mode ........................................................................................................... 70
4.4.2 Master Mode ........................................................................................................... 72
5 Using Controller Tags 75
5.1 Controller Tags ....................................................................................................... 75
5.1.1 MVI69E-MBTCP Controller Tags ............................................................................ 76
5.2 User-Defined Data Types (UDTs)........................................................................... 76
5.2.1 MVI69E-MBTCP User-Defined Data Types ........................................................... 77
5.3 MBTCP Controller Tag Overview ........................................................................... 79
5.3.1 MBTCP.CONFIG .................................................................................................... 79
5.3.2 MBTCP.DATA ......................................................................................................... 80
5.3.3 MBTCP.CONTROL ................................................................................................. 80
5.3.4 MBTCP.STATUS .................................................................................................... 86
5.3.5 MBTCP.UTIL ........................................................................................................... 90
6 Diagnostics and Troubleshooting 93
6.1 Ethernet LED Indicators .......................................................................................... 93
6.2 LED Status Indicators ............................................................................................. 94
6.2.1 Clearing a Fault Condition ...................................................................................... 94
6.2.2 Troubleshooting ...................................................................................................... 95
6.3 Connecting the PC to the Module's Ethernet Port .................................................. 96
6.3.1 Setting Up a Temporary IP Address ....................................................................... 96
6.4 Using the Diagnostics Menu in ProSoft Configuration Builder ............................... 98
6.4.1 Diagnostics Menu ................................................................................................. 100
6.4.2 Monitoring General Information ............................................................................ 101
6.4.3 Monitoring Backplane Information ........................................................................ 101
6.4.4 Modbus Server Driver Information ........................................................................ 102
6.4.5 Monitoring Data Values in the Module’s Database............................................... 103
6.4.6 Modbus Client Driver Information ......................................................................... 103
6.5 Communication Error Codes ................................................................................ 104
6.5.1 Standard MODBUS Protocol Exception Code Errors ........................................... 104
6.5.2 Module Communication Error Codes ................................................................... 104
6.5.3 Command List Entry Errors .................................................................................. 104
6.5.4 MBTCP Client-Specific Errors .............................................................................. 105
6.6 Connecting to the MVI69E-MBTCP Webpage ..................................................... 105
7 Reference 107
7.1 Product Specifications .......................................................................................... 107
7.1.1 General Specifications - Modbus Client/Server .................................................... 108
7.1.2 Hardware Specifications ....................................................................................... 108
7.2 About the Modbus TCP/IP Protocol ...................................................................... 109
7.2.1 Modbus Client ....................................................................................................... 109
7.2.2 Modbus Server...................................................................................................... 110
7.2.3 Function Codes Supported by the Module ........................................................... 110
7.2.4 Read Coil Status (Function Code 01) ................................................................... 111