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
5Using 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
6Diagnostics 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
7Reference 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
