Making pulse frequency measurements with NI USB-6356.

[cbutcher · Accepted solution]

Some small modifications got me where I needed. An image of the VI and the VI are attached (although I moved to Freq rather than Pulse Freq, because for some reason I couldn't persuade DAQmx to accept a CI.PulseFreq.Input.Term (or whatever) input, and kept being told the property was not available...)

[cbutcher]

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@NClark wrote:

Ok. Sorry for gubbing up your post, but this problem does interest me. For your buffered counter, I think I've found an example that might interest you. Can you look at "Counter (Buffered) - Continuous Output.vi" Its within the example programs that ship with LabVIEW.

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Thanks for the effort anyway! I took a look at the example you mentioned, and in the process saw "Counter - Read Pulse Width and Frequency (Continuous)" which does basically the same as what I posted already. Shame I didn't see it earlier!

[Kevin_Price]

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@NClark wrote:

...I've no idea what's going on in my current VI that is causing that measurement clipping, but...          I found the Voltage - Continuous Input example VI and so long as I have a good clock source, I can measure at greater than 1khz.

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To nclark: did you get the issue with your real vi ironed out after referencing the example that worked for higher speed sampling?  If still struggling, start a new thread and post your vi, we can probably help.

-Kevin P

[nclark]

Thanks for the offer. Unfortunately, due to the security at my workplace, I cannot post anything I write on my work machine to the internet. Its grounds for being fired, so I really don't want to do that. I need to rewrite everything at my work station from the ground up anyway. I've inherited a lot of my functions from previous engineers in my position, and close to everything written by them is less than functional.

[cbutcher]

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@NClark wrote:

 less than functional.

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That's a nice way to say something!