Can I measure the frequency from all PFI pins?

[Flowserve1]

I am using a PCI-6229 DAQmx card. I am trying to measure the frequency from pin PFI 5. I have been successful in measuring frequency from PFI0 and PFI1 but for some reason I am not able to measure on other pins. When I run the run the DAQmx Read sub VI it times out like it is not reading anything. I am using the same sub VI I created to measure 5 as I did 0 and 1 so I know that the VI is working. What is the matter? Are there only certian pins that I can measure? Would the sub VI time out because there is no signal on the pin?

[Corby_B]

Hello Flowserve1,

Thanks for your post!

The basic answer to your question, "Would the sub VI time out because there is no signal on the pin?", Is yes if there is no signal coming into the pin your are bring a signal in on. It sounds like you were able to do a "frequency" measurement on PFI0 and PFI1? Usually the counter tasks are used for such a measurement. How are you performing these frequency counter tasks on your PFI lines? It looks like on the pin read out that PFI0,1 and 5 are for digital tasks and PFI routing lines. Are you internally routing your signals to other places? If you want to measure the frequency using counters, this board has two of them so use Ctr 0 and 1 gate or source to make these measurements. Let me know if any of this helps you and perhaps you could post a piece of your code that you are using to make your frequency counts.

Cheers!

Corby_B
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