speed measurement using NI9401

Hello everyone,

I am trying to measure speed of DC motor using proximity sensor.The chasis used is NI cDAQ9172 and NI 9401 as module for connection.The proximity sensor connection to NI 9401 are 14,16 and 1 pin.We are working in LabVIEW 2009.

The error was 201003 as Unnamed_taskerror.

I guess,the problem maybe proximity sensor is not getting supply while running the labview block diagram.In the test pannel when we click on start sensor's light gets on.But when we run our main program,light disappears.No output in the waveform graph and we get error in DAQ as said above.

Are we doing correctly?or missing some step for the experiment?

Thanks,

LabVIEW beginner