countdown timer while loop

[zain1612]

I am trying to stop a while loop using a countdown timer with the ability to stop by using the stop button. However when the timer hits 0 the vi doesnt stop.

[jcarmody]

never mind

[GerdW]

zain,

what happens when you check the millisecond timer just one millisecond later (oer earlier)? Your comparison with zero will give a FALSE output…

Easy solution: use a more "robust" comparison function here, which also outputs TRUE, when time is over.

Or use the ElapsedTime ExpressVI, which does this thing right!

[zain1612]

Oh sorry for not elaborating. I created a countdown VI and it works on its own but when I try and integrate it to my getDataV2 vi the code doesnt work and I cant figure out whats going wrong. 

[GerdW]

Hi zain,

this new VI has the very same problem as the one in the first message…

[zain1612 · Accepted solution]

Oh sorry didnt save it before upload. I used the elapsed time vi to achieve it. Thanks guys

[edwardanthony]

Hello Sir, above attached is the error i faced. What i wish to achieve is that when the reading  the lesser than-0.4 or more than 0.4, i want to have a timer to let it have a delay of 5 seconds before i would actually trigger the alarm meaning to say that if the value lesser than -0.4 or more than 0.4 is less than 5 seconds. There would actually be no alarm. I've tried earlier when i put in a timer, it would actually buffer once every 5 seconds. Please guide me along if you guys got any ideas regarding this issue. Thanks.  

[crossrulz]

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@edwardanthony wrote:

Hello Sir, above attached is the error i faced. What i wish to achieve is that when the reading  the lesser than-0.4 or more than 0.4, i want to have a timer to let it have a delay of 5 seconds before i would actually trigger the alarm meaning to say that if the value lesser than -0.4 or more than 0.4 is less than 5 seconds. There would actually be no alarm. I've tried earlier when i put in a timer, it would actually buffer once every 5 seconds. Please guide me along if you guys got any ideas regarding this issue. Thanks.  

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All you need is an In Range And Coerce and an Elapsed Time.