TechTalk – Rockwell RSLogix5 : Inter-PLC Communication – MSG Function Block Read From Multiple PLC And Write

This is an excellent example of reading from multiple PLC and at the same time read and writing to a a particle PLC.
All these is achieved using one TON (timer) function block but message exchanged being done at different time slots.
PLC A is being read at 8th second mark and PLC B is being read and written at 10th second mark.

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

Here are the configurations fotr all the 3 MSG function blocks.

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

You can us the .EN trigger to trigger MSG blocks as well.

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

Xybernetics Rockwell RSLogix5 - MSG Function Block Read From Multiple PLC And Write

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I am a software developer in Calgary, Alberta, Canada with passion in getting my fingers in any new technology. I started software development when I was 10 years old and have never looked back. Now with well over 35 years of software development, I wanted to share some of these key knowledge with the people of the world in the wide web.