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AI triggering DO

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Hi all,

 

I may have been posting this in the wrong section before. Anyway, I'm fairly new to labview and I have a pretty basic problem which I'm hoping you could help me with.

My problem:

Aquire a analog signal which will slow down in frequency (from ~60 to 50 Hz). When the frequency reach 50 Hz, I want to send a digital out. It is important that the whole process is very fast, it can maximum take 0.1 ms from when the signal has reached 50 Hz to when the digital is triggered.

I thought I would ask here before I try to do something that probably won't work anyway :-)

Does anyone know if there's an example VI close to this? I've searched the forum and the example search but haven't found any.

 

My setup: cRIO 9076, 9401 and the analog in is not yet bought.


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