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NI USB 6000 series Pretriggering

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Hi Newer (aka former mifta),

 

But StartTrigger actually start the data saving, right?

No, your VI will not magically "save data" when a trigger is received at the PFI pin.

 

Maybe I use different word, but I mean data saving is acquiring data.

Yes, the DAQmx task will start acquiring data when the StartTrigger is received…

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
Message 11 of 15
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How about like this:

 

while continuously collecting data (buffer) signal that goes to AI Port, the NI USB 6000 series also counting using Counter of PFI0.

If there is increment from counter, let say because of there is Rising Digital Signal on the port, so the buffer data stops, saving or acquiring the data, and stops until all the samples collecter.

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Message 12 of 15
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Hi Newer,

 

while continuously collecting data (buffer) signal … so the buffer data stops, saving or acquiring the data, and stops until all the samples collecter.

I don't know what you are trying to explain or ask here, but with your USB600x devices you need to implement all this in software.

Just do it!

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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Message 13 of 15
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Okay, I will try.

 

I just wondering if I can:

 

do READING AI

while

COUNTING using PFI0 COounter

 

Yep, maybe you are right, I will try to implement.

 

Thanks a lot GerdW 🙂

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Message 14 of 15
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I found an example HOW TO READING (or data acquiring) AI while also READING DIGITAL INPUT.

It is two function that happens in same time.

 

Maybe I will try to implement how to read AI while in parallel, counting user PFI0 counter.

 

That is all what I meant from the start 🙂

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Message 15 of 15
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