Count only when a external TTL signal is high
Hallo,
I'm using LabView 6.1 on WinXP with a NI6014 DAQ Board...
I have to count a some TTL pulses only when another TTL signal is high (start the count when the signal goes high and stop it when the signal goes low). Can I program the DAQ to do this (like a gate function) so that in the meanwhile my program can do other things, and only at the end I read the result of the count?
Thank you,
Pixo
Hello Pixo,
Thank you for your inquiry regarding counters on the PCI-6014. It sounds like you would like a gate function for the counter that you are using. There is a gate for each counter that enables the counter when the gate line is high and disables the counter when this line is low. The I/O connector pin assignment and signal descriptions can be found here . To use the counter you must first configure it and then use a Counter Start VI. Then when the gate is high the counter will increment and the value can be read at the end of the program like you had stated. I have attached a great example VI to get you started with counters. Other examples like this can be found in LabVIEW 6.1 under �Find Examp
les from the LabVIEW startup screen.
I hope these resources help. Let me know if I can further assist you.
Shea C.
Applications Engineering
Attachments:
Getting_Started_Counters.vi 64 KB
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