ProSoft Technology MVI71-MCM - Manual (Page 53)

Reference MVI71-MCM ♦ PLC Platform
Modbus Communication Module
ProSoft Technology, Inc. Page 53 of 111
December 28, 2007
5 Reference
In This Chapter
¾ Product Specifications............................................................ 53
¾ Functional Overview............................................................... 55
¾ Cable Connections................................................................. 79
¾ MVI71-MCM Database Definition........................................... 85
¾ MVI71-MCM Status Data Definition ....................................... 85
¾ MVI71-MCM Configuration Data Definition ............................ 87
¾ MVI71-MCM Command Error Codes ..................................... 94
¾ Configuration Error Codes ..................................................... 95
¾ Frequently Asked Questions .................................................. 96
5.1 Product Specifications
The MV71 Modbus Master/Slave Communication Module allows PLC processors
to interface easily with other Modbus protocol compatible devices.
Compatible devices include not only Modicon PLCs (which all support the
Modbus protocol) but also a wide assortment of end devices. The module acts as
an input/output module between the Modbus network and the Rockwell
Automation backplane. The data transfer from the processor is asynchronous
from the actions on the Modbus network. A 5000-word register space in the
module exchanges data between the processor and the Modbus network.
5.1.1 Features and Benefits
The inRAx Modbus Master/Slave Communication Module is designed to allow
PLC processors to interface easily with Modbus protocol-compatible devices and
hosts.
The MVI71-MCM module acts as an input/output module between the Modbus
network and the Rockwell Automation backplane. The data transfer from the PLC
processor is asynchronous from the actions on the Modbus network. A 5000-
word register space in the module exchanges data between the processor and
the Modbus network.