LabVIEW loop takes 100% of cpu

Hello

I was wondering the best way to send a command series when a key is pressed.  At this moment I have a while loop that checks if the key each time.  If is is, it sends the command series and adds the response to a text via a shift register box.  If this isn't the case, the original text box info is passed to the shift register.  However, this loop takes 100% cpu (ok, a single core at 100% so technically 50%), and I think that its because the text box becomes ignored each cycle.  However, I'm not sure how else to do it.  Is attached a screenshot, let me know if you want to the file.

Thank you

Eric

You have what is called a greedy loop. It runs just as fast as possible that finally consumes 100% of your CPU. Simply place a wait with a delay of 0 in the loop and this will allow the Planner to do other things and prevent the CPU to be hungry.

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