MVI69L-MBS ♦ Platform
Contents
Modbus Serial Lite Communication Module
User Manual
ProSoft Technology, Inc.
Page 5 of 130
4.3.2
Read Block: Response from the Module to the Processor .................................... 59
4.3.3
Read and Write Block Transfer Sequences ........................................................... 59
4.4
Data Flow Between the Module and Processor ..................................................... 60
4.4.1
Slave Mode ............................................................................................................ 60
4.4.2
Master Mode .......................................................................................................... 62
5
Using Controller Tags
64
5.1
Controller Tags ....................................................................................................... 64
5.1.1
MVI69L-MBS Controller Tags ................................................................................ 65
5.2
User-Defined Data Types (UDTs) .......................................................................... 65
5.2.1
MVI69L-MBS User-Defined Data Types ................................................................ 66
5.3
MBS Controller Tag Overview ................................................................................ 67
5.3.1
MBS.CONFIG ......................................................................................................... 67
5.3.2
MBS.DATA ............................................................................................................. 67
5.3.3
MBS.CONTROL ..................................................................................................... 68
5.3.4
MBS.STATUS ........................................................................................................ 71
5.3.5
MBS.UTIL ............................................................................................................... 72
6
Diagnostics and Troubleshooting
73
6.1
Ethernet LED Indicators ......................................................................................... 73
6.2
LED Status Indicators ............................................................................................. 74
6.2.1
Clearing a Fault Condition ...................................................................................... 74
6.2.2
Troubleshooting ...................................................................................................... 75
6.3
Connecting the PC to the Module's Ethernet Port ................................................. 76
6.3.1
Setting Up a Temporary IP Address ...................................................................... 77
6.4
Using the Diagnostics Menu in PCB ...................................................................... 79
6.4.1
Diagnostics Menu ................................................................................................... 81
6.4.2
Monitoring General Information .............................................................................. 81
6.4.3
Monitoring Network Configuration Information ....................................................... 82
6.4.4
Monitoring Backplane Information .......................................................................... 82
6.4.5
Port 1 Module Information ...................................................................................... 83
6.4.6
Monitoring Data Values in the Module’s Database ................................................ 84
6.5
Communication Error Codes .................................................................................. 84
6.5.1
Standard MODBUS Protocol Exception Code Errors ............................................ 84
6.5.2
Module Communication Error Codes ..................................................................... 84
6.5.3
Command List Entry Errors .................................................................................... 85
6.6
Connecting to the MVI69L-MBS Webpage ............................................................ 85
7
Reference
87
7.1
Product Specifications ............................................................................................ 87
7.1.1
MVI69L General Specs .......................................................................................... 87
7.1.2
Hardware Specifications......................................................................................... 88
7.1.3
General Specifications - Modbus Master/Slave ..................................................... 88
7.2
About the Modbus Protocol .................................................................................... 89
7.2.1
Modbus Master ....................................................................................................... 89
7.2.2
Modbus Slave ......................................................................................................... 89
7.2.3
Function Codes Supported by the Module ............................................................. 90
7.2.4
Read Coil Status (Function Code 01) .................................................................... 90
7.2.5
Read Input Status (Function Code 02) ................................................................... 91
7.2.6
Read Holding Registers (Function Code 03) ......................................................... 93
