Frequency with DI on 6320

[HVAC_master]

I need to find the frequency of square pulses.  They will be around 200 Hz to 1500 Hz.  I am using a NI 6320 PCIe card.  Whenever I set the daqMX to Counter Input Frequency it tells me that I don't have a counter hardware specified.  The 6320 card has 8 Po and 16 PFI.    I have tryed using the example "Count Digital Event" without any luck.  

help please

-Kevin

[Aaron O]

Hi Kevin,

If you want measure the frequency of the square pulses, you will want to use the counters on your device.  There are several good examples in the LabVIEW Example Finder ( LabVIEW >> Help Menu >> Find Examples ).  Take a look at the following examples:

Under the Browse Tab >> Hardware Input and Output >> DAQmx >> Counter Measurements >> Digital Frequency:

For low frequencies, such as the ones that you are suggesting, try:  Meas Dig Frequency-Low Freq 1 Ctr.vi

There are also several other examples in the Digital Frequency category that you could give a whirl.

Cheers,

Aaron