Prosoft-technology MVI71-MCM Manual de usuario Pagina 62

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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).
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