[jman4747]

Originally Posted by Joe Ross

I'm confused. Are you saying that on the cRIO, in this same setup, the rate of the counter is correct, and on the roboRIO, the rate is incorrect? If so, you should report a bug.

I meant to say that I haven't tested any counter stuff on the roboRIO only the C-RIO and for the application I want to use the counter value output. To get velocity using the counter value output you have to know how often your loop runs. To do that you would have to use a timed loop which I did on the C-RIO. The question is would the VI in post #2 replace the method that uses a timed loop and do so successfully on the roboRIO.