counting ttl pulses with pci6014 and traditional DAQ

[ianshapiro]

My goal is to count ttl pulses over a specified bin size from an APD photon counter.

I dowlnoaded Count_Events-Easy (DAQ-STC).vi from the NI website, and tried using it to count ttl pulses through the PFI 0 channel of my pci-6014 basic multifunction DAQ.  If I run the vi continuously it does not display an counts unless the Measurement & Automation test panel is open for the pci-6014 and I select the corresponding counter and event source under Counter I/O.  The vi counts match the  test panel counts, for what that's worth.  If I reset the counter I/O test panel the vi stops counting and will not start again until the counter I/O is restarted.  Also, if I stop the vi  the test panel also resets. 

Why won't the vi run on its own?  Is there something obvious I'm missing here?

[Ryan_V[DE]]

Ian,

Please see the answer given in the following post:

http://forums.ni.com/ni/board/message?board.id=170&message.id=130996

Good Luck!
Ryan V.
National Instruments

Message Edited by Ryan V on 07-13-2005 03:16 PM