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DO Pause Trigger Signal

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    Last Modified: February 26, 2018

    Use the DO Pause Trigger signal to mask off samples in a DAQ sequence. When DO Pause Trigger is active, no samples occur, but DO Pause Trigger does not stop a sample that is in progress. The pause does not take effect until the beginning of the next sample.

    When you generate digital output signals, the generation pauses as soon as the pause trigger is asserted. If the source of the sample clock is the onboard clock, the generation resumes as soon as the pause trigger is deasserted, as shown in the figure below.

    Figure 1. DO Pause Trigger with the Onboard Clock Source

    If you are using any signal other than the onboard clock as the source of the sample clock, the generation resumes as soon as the pause trigger is deasserted and another edge of the sample clock is received, as shown in the figure below.

    Figure 2. DO Pause Trigger with Other Signal Source

    Using a Digital Source

    To use DO Pause Trigger, specify a source and a polarity. The source can be a PFI signal or one of several other internal signals on the cRIO controller.

    You also can specify whether the samples are paused when DO Pause Trigger is at a logic high or low level. Refer to the Device Routing in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information.


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