Hi William, I looked at your VI. Actually the code seems fine to do that calculation, though you do not really need to use the local variables, you could also use direct wires instead. I am guessing you are meaning something different in your question? Are you trying to measure the time using the FP-CTR-500? what I see in your code is that you use LabVIEW's Operating system timer function. If you want to use the Fieldpoint counter, try using FP Read vi, and read the channel count tag.
ErikvH Applications Engineering National Instruments
