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MVI71-MNET ♦ PLC Platform Reference
Modbus TCP/IP Interface Module User Manual
Page 60 of 109 ProSoft Technology, Inc.
June 23, 2009
Main Logic Loop
Upon completing the power up configuration process, the module enters an
infinite loop that performs the functions shown in the following diagram.
Call I/O Handler
Call CFG/DEBUG Port
Driver
Call Network Client &
Server Drivers
Call I/O Handler
Transfers data between the module and processor
(user, status, etc.)
Call Serial Port Driver
Rx and Tx buffer routines are interrupt driven. Call to
serial port routines check to see if there is any data
in the buffer, and depending on the value, will either
service the buffer or wait for more characters.
Call Network Client & Server Drivers
Generate messages and
respond to messages received.
From Power Up Logic
Block Transfer Backplane Data Transfer
The MVI71-MNET module communicates directly over the PLC backplane for the
block transfer interface. Data is paged between the module and the PLC
processor across the backplane using BTR and BTW operations. Data is
transferred from the module to the processor using the BTR blocks, and data is
transferred from the processor to the module using the BTW blocks.
- MVI71-MNET 1
- Warnings 2
- Battery Life Advisory 3
- Your Feedback Please 3
- Contents 5
- 1 Start Here 9
- 1.2 Package Contents 10
- 1.4 Setting Jumpers 12
- DF1 DEVICES 17
- 2 Module Configuration 19
- 2.2 Module Data 22
- 2.3 Status Data 22
- 2.4 User Data 22
- 2.5 Event Command Data 23
- 2.6 Modbus Message Data 23
- 2.7.1 Set Up the Project 24
- 2.7.2 Set Module Parameters 26
- 2.7.3 [Module] 27
- 2.7.4 [Static ARP Table] 29
- 2.7.5 [MNET Client x] 30
- 2.7.7 [MNET Servers] 37
- 2.7.8 Ethernet Configuration 39
- OWNLOAD button 40
- OWNLOAD dialog 40
- 3 Ladder Logic 41
- In This Chapter 43
- 4.1.1 Required Hardware 43
- IAGNOSTICS 44
- on your keyboard 45
- 4.1.3 Main Menu 46
- 4.1.4 Modbus Database View 49
- 4.1.5 Command List Menu 51
- 4.1.6 Network Menu 52
- 4.2 LED Status Indicators 53
- 4.2.3 Troubleshooting 55
- 5 Reference 57
- 5.2 Functional Overview 59
- 5.2.1 General Concepts 59
- 5.3 Cable Connections 78
- 5.3.1 Ethernet Connection 78
- 6.2.1 All Product Returns: 100
- 6.3 LIMITED WARRANTY 101
- 6.3.8 No Other Warranties 105
- 6.3.9 Allocation of Risks 105
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