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GTaylor

Control Net Problem

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I have a PLC 5 program that is acting as a master controller for several other various PLCs.  I have found where an input is coming in off of ControlNet.  I went to the relevant ControlLogix program but I cannot find where this output is being written to.  I am fairly new to Rockwell as I have come from a Melsec background.  Any help would be appreciated.

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There has to be a message block in one of the two processors. Either the PLC-5 is reading, or the CLX is writing.  Since when the PLC-5 was in it's prime, CLX's did not exist, it is easier to configure a write to a PLC-5. In the CLX program, open the controller tags, there is a column for data type, double click on it and it will sort by data type, then look for a MSG.

Then, if you find a MSG, highlight the row, then right click and select cross reference to find where it's located in the logic.

 

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