Identify the number of pulses per IRC revolution - how to trigger counter

[ceties]

I am trying to count number of pulses per one revolution of incremental sensor-e.g. pulses between two reference marks. But I cannot figure out how to start or even stop the counter.

Counter 1 - the IRC pulses
PFI0 - the reference mark as a trigger

I always get warning that : Specified property is not supported by the device or is not applicable to the task.
Property: Start.TrigType

Does it mean that the counters on PCI 6120 don't support triggering?
Thanks

[Matyas]

Hi,

I've answered here:

http://forums.ni.com/ni/board/message?board.id=170&message.id=421959

Have a nice day!