ProSoft Technology MVI71-MCM - Manual (Page 22)

MVI71-MCM ♦ PLC Platform Installing and Configuring the Module
Modbus Communication Module
Page 22 of 111 ProSoft Technology, Inc.
December 28, 2007
Offset Description
4 Swap Code
5 Slave Address
6 Modbus Function
7 Destination Address
8 Spare
9 Spare
10 Copy the new ladder file to your existing ladder application.
11
Modify the communication set up jumper in the back of the MVI71-MCM,
selecting the communication type for each port (485, 422 or 232).
12 Insert the module in the rack and connect the port(s) to the Modbus network.
Make sure the connection correctly follows the wiring diagrams shown in this
manual.
13 Turn on the rack power and download the new ladder file to the PLC.
2.2 Configuring the Module
In order for the MVI71-MCM module to function, a minimum amount of
configuration data must be transferred to the module. The following table
provides an overview of the different types of configuration data that the module
requires, depending on the operating modes to be supported.
Module Register
Address Functional
Modes Affected Name Description
5000 to 5009 Data Transfer General Module
Configuration This section of the configuration data contains the
module configuration data that defines the data transfer
between the module and the PLC processor.
5010 to 5039
and
5040 to 5069 Master and
Slave Port
Configuration These sections define the characteristics of each of the
Modbus serial communication ports on the module.
These parameters must be set correctly for proper
module operation.
5200 to 6199
and
6400 to 7399 Master Master
Command List
If the module's Master Mode functionality is to be
supported on a port, the Master Command List must be
set up.
Refer to Installing and Configuring the Module for a description of the
configuration of the module. The MVI71-MCM module must be configured at
least once when the card is first powered, and any time thereafter when the
parameters must be changed.
2.2.1 Power Up
On power up, the module enters into a logical loop waiting to receive
configuration data from the processor. Upon receipt, the module will begin
execution of the command list if it is present.