What is the best way to check if the trigger was held

What is the fastest way to check if the trigger was held. Right now, the only way I can think is to query the number of samples acquired on the AI channel (which is triggered). Is there a faster way? Is there a property node (that I can't find) that returns TRUE/FALSE?

Thank you

Can you elaborate a bit more? What type of trip (I guess a start trigger)? What equipment? What do you mean by 'faster '?

There is no property to "has a start trigger has occurred." If you want to find if a start trigger has occurred, you can he deduct the number of samples. There are several approaches you can take:

* DAQmx Read will hang until a timeout is hit or up to the number of samples you request is read. You could do a DAQmx Read with a timeout-infinity (1), playback of a single sample.

* Well, you could ask about properties DAQmx Read TotalSampPerChanAcquired or AvailSampPerChan; Once they no longer means 0, while this NEITHER-DAQmx started buffering data internally, which means that the material received the trigger.

* If you use a digital border start trigger and according to your material, then you may be able to use the detection of changes in a separate task, but I don't know if it would be significantly faster then the other two approaches.

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    mattknowles wrote:
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