ProSoft Technology MVI71-MCM - Manual (Page 62)

MVI71-MCM ♦ PLC Platform Reference
Modbus Communication Module
Page 62 of 111 ProSoft Technology, Inc.
December 28, 2007
Ex. 2 : The next figure shows another example of how to use the Read Data
Area; an MVI71-MCM port configured as a Master sends a Modbus Read
Command to a Slave device. The Modbus Read Command destination address
must be located inside the Read Data Area (between addresses 0 and 239).
Write Data Area Application Examples
Ex. 1 : The following figure shows a Write Data Area application; a Modbus
Master device sends a Modbus Read Command to an MVI71-MCM slave port.
The command source address (in the MVI71-MCM database) must be located
inside the Read Data Region (between 240 and 479).