Why the STOP button does not stop this vi?

Hello

I took an example of Labview 2011 called "soul hollow period-Low Freq 1 Ctr.vi. This example vi measures one period, but, I want to measure the period over and over again, so I put it in a WHILE loop, but the STOP button does not stop at the vi.  Instead, I have to use ABORT to stop the vi...

How can I stop this vi?

Dave

It does not replace the time-out.  The while loop is a separate beast from the meter reading.  You wouldn't want your loop due to always make you miss the error messages, would you?

Usually just clear the error message of time-out on the counters.

You get the message twice because the loop runs in fact twice.  The first time the stop button is read as false as soon as the loop begins.  Then you click on it.  At the same time that it takes 10 seconds for the timeout counter to occur - when he does it gives you the error.  Then, the loop runs again.  This time it reads the key stop as true, because you clicked on it during the timeout of 10 seconds of the last loop.

A time loop allows everything inside to complete execution before the end, then you will have to wait for an another timeout of 10 seconds to occur which produces another error.

Unless you need a measure of very, very low frequencies I set your time-out to a more reasonable number and simply erase the mistake if it matches 200474.

Tags: NI Software

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