06-28-2012 10:32 PM
I'm working on a PXI-6115 DAQ card and want using analog signal to trigger it's counter generate frequency pulse. The user manual says the analog trigger is supported, but I can't use a analog signal to trigger it start work, in the test I use counter 0 to generate pulse and use PFI 0 as analog trigger signal input port, can anyone tell me what the matter is? My test VI. & error message is showing in attachment .
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06-29-2012 09:42 AM
If you read the error you can see that digital triggers are the only available trigger when using Counter Output.
You can get around this by setting up a dummy Analog Input task that will fire an internal digital trigger when it sees the appropriate analog trigger.
See this thread for more details:
07-01-2012 09:36 PM
Thanks for your response.
AnologComparisonEvent is a evil event, Even if 6115 analoge channels without retrigger function, it can offer a internal trigger pulse everytime the analoge trigger signal fit pre-set trigger state. Now I use AnalogComparisonEvent as CO clock source and CO task is working properly .