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How to create a pushbutton delay in the FPGA module in Labview 8.2

I am a very inexperienced programmer of Labview, and I have what I thought would be a simple problem. I have a CompactRIO system that utilizes Labview 8.2 as well as RT and FPGA modules. I am running an end of line tester that uses a pushbutton to start the test. I am looking to force an operator to hold the test start pushbutton for one second before testing begins. If the pushbutton is released before the second is up, the test will not start. In the FPGA module, I cannot figure out how to accomplish this. I have tried using both flat sequence and while loops, but I cannot get the program to work as stated above. With the flat sequence there is not a way, that I could see, to break out of the sequence should the pushbutton be released. Using the while loop, I was closer to a solution, but could not get the program to read the input consistently. I did verify that the 24Vdc signal is getting to the input card whenever the pushbutton is pressed. The program worked fine without trying to add the delay when I was just looking for a transistion to 24Vdc on the input card when the pushbutton was pressed.

 

Any ideas?  Thanks!

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Here's how you might do it with a button on-screen in LabVIEW for Windows.  If you need more specific help, post your code, or a small portion of it that demonstrates the bit that you can't get working.  (The snippet is in LabVIEW 2009 since that's what I'm using, but the attached VI is saved for 8.2)

Hold 1 Second.png

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