I am trying to power, and monitor RPM using an optical tachometer with a 9411 card on a 9035 cRIO. I have added the module to my project, and selected it as a counter channel. I am trying to count the number of pulses in a set period of time, then converting that to RPM.
I am able to power the tach with the 5V output from the card, but it does not seem to be picking up the pulses. I have the power coming from pins 4 and 12(com) on the card, and my signal comes back into pin 1. Everything I have tried generated 1 of 2 things:
1) it does not pick up pulses at all
2) for some reason it just counts, seemingly, ever loop without actually detecting a pulse (item is not spinning so pulse should not be generated).
It doesn't make sense to me that this doesn't work. For what it is worth, I am needed to use all 6 channels on the counter card, in this same fashion. But currently I am only trying to use 1 tach. Does anyone have any ideas what could be going on?
