Universal time and dynamic data record

Hey guys, fundamental question.

I have a pressure transducer unique that I record the data of.  I want to have a single button that the user can press to start recording and have the same button to stop recording.  I suppse capture what is the user, I would like to see updates periodicals what sees the DAQ assistant.

The problem I have is that the timestamp of the data file is repeated for each cycle of the DAQ assistant.  Which means, if I record two cycles to 5 Hz and 5 samples, my time is 0,.2,.4,.6,.8, 0,.2,.4,.6. 8 see it repeats.  Ideally I'd like it to go like this 0,.2,.4,.6,.8, 1, 1.2, 1.4, 1.6, 1.8. I am attached the VI and the sample output.  I appreciate any help you guys can provide.

John

How do you use your VI?

It runs only once stops.  It doesn't have a while loop for several iterations.

Please don't tell me that you are using the run button continues and the button abandon.  They are only for debugging purposes.

If you put some time a loop around your code and use a real stop on your front button, you will see that it works fine.  Continuous running is not identical to a while loop.  It is rather, run, run once again, run again, run again, always restart the VI until you hit the abort button, which is what is causing your time stamps to restart.

Tags: NI Software

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