Case structure with separate buttons to trigger individual cases?

[altenbach]

Yes, since the case should only execute once and then wait again, an event structure is more appropriate here.

A few comments.

• You don't need the wait because the loop does not spin unless needed.
• You also need to add an event for the stop button.
• You could combine all buttons into one event case to simplify the code.
• How often do the address, resource, and output of the prologix subVI change? If they are static during the subVI execution, they belong before the loop. 

[altenbach · Accepted solution]

Here's one possible solution to keep it all in one event case for simplified editing. (I made some other assumptions, so modify as needed).

[martinv]

Thanks for additional comments and the vi.  It was very helpful.