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Posts: 248

Re: NI-DAQmx Multiple Tasks on one card?

Yes, it is possible. When I run your code I get the results I expected (sinewaves on ai0 and ai1). Below is a screenshot of the acquired data. Did you have a separate VI for acquiring the signals for validation?


Two Sine Waves.PNG

NI Sound and Vibration
Posts: 52

Re: NI-DAQmx Multiple Tasks on one card?

One channel of my analog scope broke...  I had thought that these analog equipments outlive digital stuffs, but I was wrong.  Thanks for testing out the code.  I really appreciate that.

Posts: 12

Re: NI-DAQmx Multiple Tasks on one card?

[ Edited ]

This thread was quite informative but outdated. I want to know if anything has changed since 2004 with the ability to run multiple tasks on the same device. I have cDAQ-9188 which can supposedly run 7 different generations/acquisitions at the same time. I also have an NI 9264 analog output module. I had hoped to group a few channels together in one task that generates DC, and also create another task that generates waveform data. So far it claims that the device is busy if I try to run more than one task at once, even though tasks do not share channels. Is a single module still only capable of a single sample rate?

Posts: 110

Re: NI-DAQmx Multiple Tasks on one card?

For closure, the short answer is no. Here is a more detailed resource:


How Many Different Tasks Can I Concurrently Run on a Gen II CompactDAQ Chassis?

Jeff M
Applications Engineer
National Instruments