continious loop

[blizabeth37]

On the lower half of stop switches, I want to record just the initial time when the switch closes because it will remain closed for a long time after. I am unsure of how to how to record this initial time because currently the time keeps increasing as long as I hold the switch closed. The first set of switches (start) do not need this same modification. They work correctly. I have attached my current VI.

Thanks so much!

[ricky chauvin]

I would suggest taking what the boolean value was on the previous cycle.  Then a case structure stating  current run = previous run, if false then record new value.

Do this for each boolean.  Should work, I've used similar logic in the past.

I'm afraid I dont have time to show you by work on the vi at the moment.  Sorry if I havnt been very clear.

[johnsold]

I do not understand why you OR the data with an array of False, but that is not relevant to your question.

To detect the change, us a shift register.  When the current value is True and the previous value is False, then record the transition time. 

Lynn 

[blizabeth37]

Thanks for your quick response!

I'm afraid I'm still confused. Would anyone be able to show we on my VI?? Thanks so much!

[johnsold · Accepted solution]

I cannot test it because I do not have the DAQ hardware.

Lynn 

[blizabeth37]

Awesome!

The only problem is it is opposite. I want to record the intial time when the switch closes and remains closed...right now the time stays constant when the switch intially opens. How do I switch that??

Thanks so much for your help!

[blizabeth37]

I actually just figured it out! I just removed the boolean NOT because it was opposite.

Thank you so much! You were so helpful!

[ricky chauvin]

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