The use of the multiple "wait on basis of events."

I download an example of VI demonstratinig using the function of occurrence.

When I tested it that VI, it is 'sometimes' not triggered in odds on occurrence.

I don't know how to explain it...

Cound someone give me any suggestions?

Thank you very much!

What is your question? Ask yourself why sometimes a timeout condition occurs? You are triggering the appearance every 100ms, and you have a delay of 100 ms on the expectation on this case. The time is not that precise. The wait function (ms) sets a lower limit for the wait but does not absolute chronology, so this loop are often a bit longer than 100 Ms. On an operating system (like Windows), there is no way to guarantee absolute sync - you need real time for this operating system. Because sometimes, the accident will not be programmed within 100ms, waiting on Occurrence will occasionally expire. Use a longer period on the waiting on Occurrence and you will see this much less frequently, with little effect on the timing of the overall system.

Tags: NI Software

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