how do I monitor multiple daqmx analog input channels for trigger of daq (all on same PXIe-6368)

[jkessler]

Using PXIe-6368 module, I would like to monitor analog input signal on multiple channels and trigger acquisition on multiple channels--trigger channels and acquisition channels are all on the same device. Probably will be sampling at 200 kHz and above. Using LV 2009 or 2012, with SV toolkit in Windows 7.

If SW trigger is the only way to go, is example code out there showing how to handle block size, etc.?

[Chris.N]

jkessler,

There are examples in the Example Finder.  You can get there by clicking Help...>>Find Examples.  Then you can navigate to Hardware Input and Output>>DAQmx>>Analog Input>>Voltage-Finite Output.  You will see different trigger options.  You're device is not limited to SW triggers.  In the future, you might find you will receive more help if your post is in the Multifunction DAQ forum instead of the LabVIEW forum as there will be more users familiar with your issue in the correct forum.

Cheers,

[jkessler]

Chris,

Thanks, maybe I should repost to the the other forum as I can't find example code that monitors mulitple channels and triggers when any one of the channels reaches a specified level. I'm in LV 2009. If you see such an example, maybe it is 2012?

[Chris.N · Accepted solution]

jkessler,

Yes the example was in 2012.  I did not understand what you were asking in your first post because I did not realize that you wanted ANY channel to trigger acquisition of all channels.  This will not be possible in hardware, because you cannot specify four channels as the trigger source. This will have to implemented in software.  I would recommend reading from all four channels and neglecting the data until you determine that one of the channels reached your value threshold.

Regards,