Start with one of the Count Digital Events examples. Insert a "DAQmx Channel" property node after the "DAQmx Create Channel" VI and before the "DAQmx Start Task" VI. Select the "Counter Input->Count Edges->Input Terminal" property. Right-click on the property and choose "Create->Constant." Select the desired RTSI terminal in the DAQmx Terminal constant.
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Geoff Schmit
Huskie Robotics, FIRST Team 3061 Lead Mentor
http://team3061.org/
@team3061