Is there a speed sensor input example for Labview?

[nickcvet89]

We used the photoelectric sensor (line follower) from the 2011 season and, used this as a tachometer and sent the information to the DS similar to marks example. I might post a video on how to do it next week.

[marccenter]

Dear CD,

Mark's example worked with me with one small modification, I changed the 0.05 value going to the config Timer to 0.5 (timeout value) and I placed the Periodic Tasks inside a 100 msec loop not the 10 msec loop also available.

I am able to read the Tachometer on the Variables page but not on the smart dashboard. I have fiddled with the smart dashboard displays and they seem to have a much slower update and seem to "freeze up" after a short period of time on my bench setup at home. I wouldn't trust them too much if you are using them for control purposes... use the variables page to confirm your software is operating as expected is my 10-cent advice.

BTW, I am testing an AndyMark PG188 gearmotor at home that has a free speed of about 75 rpm. This operates at a safe
speed and I can see the Rockwell Automation sensor built in lights toggling to indicate a change of state. I have not yet configured a CIM for higher speed measurement operation.

I see the code segment below appears to be run in the 10 msec loop. Hmm... I may move the 100 msec counter logic into the 10 msec loop and see if the motor speed shows up on the smart dashboard.