Issue:

Is there system words available in the M340 to help me troubleshoot the READ_VAR and WRITE_VAR communication block?

Product Line:

M340

Resolution:

There are a few system words to help.

%SW90 provides the maximum number of requests that the PLC can handle.
%SW86 indicates the number of messages being refused.  It should always be at 0.

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Released for: Schneider Electric USA