Digital Output >> Invert Lines

NI-DAQmx C Properties

Digital Output >> Invert Lines

Data Type: bool32
Description: Specifies whether to invert the lines in the channel. If you set this property to TRUE, the lines are at high logic when off and at low logic when on.

You can get/set/reset this property using:
  DAQmxGetDOInvertLines
  DAQmxSetDOInvertLines
  DAQmxResetDOInvertLines