CompactDAQ PFI Line Triggers Unexpectedly

Updated Jun 14, 2018

Reported In

Hardware

  • cDAQ-9178

Software

  • LabVIEW

Driver

  • NI-DAQmx

Operating System

  • Windows

Issue Details

I have set up a digital rising edge trigger with DAQmx, and something is causing it my PFI0 line on the cDAQ-9178 trigger before expected. Why is this happening?

Solution

Monitor the PFI line. Digital lines will trigger when the threshold voltage is reached (2 V - 5.5 V for most of our DAQ devices). If the threshold voltage is reached, double check that your wiring is set up properly, and check the digital output of the trigger source. If the voltage is not reached, make sure your program is set up properly.

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