Change Detection >> Digital Input >> Tristate

NI-DAQmx C Reference Help

Edition Date: January 2019

Part Number: 370471AM-01

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Data Type: bool32
Description: Specifies whether to tristate lines specified with Rising Edge Physical Channels and Falling Edge Physical Channels that are not in a virtual channel in the task. If you set this property to TRUE, NI-DAQmx tristates rising/falling edge lines that are not in a virtual channel in the task. If you set this property to FALSE, NI-DAQmx does not modify the configuration of rising/falling edge lines that are not in a virtual channel in the task, even if the lines were previously tristated. Set this property to FALSE to detect changes on lines in other tasks or to detect changes on output-only lines.


You can get/set/reset this property using:

  DAQmxGetChangeDetectDITristate

  DAQmxSetChangeDetectDITristate

  DAQmxResetChangeDetectDITristate

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