ProSoft Technology MVI71-MCM - Manual (Page 60)

MVI71-MCM ♦ PLC Platform Reference
Modbus Communication Module
Page 60 of 111 ProSoft Technology, Inc.
December 28, 2007
The Read Data area is constantly transferred from the MVI71-MCM to the PLC
using BTR instructions while the Write Data area is constantly transferred from
the PLC to the MVI71-MCM module using BTW instructions:
For example, if the user sets the Read and Write areas as:
Read Register Start :
0
Read Register Count : 240
Write Register Start : 240
Write Register Count : 240
This configuration would set the module internal database as: