Hey,
I am using NI-USB 6210 to measure the period of a
digital signal (from a tachometer). I can display the TTL signal using "Read
Dig Port.vi" and also count edges using "Count Digital Events.vi". Both of them
I obtained from the LabView examples folder.
When I want to measure the periods, the "Meas Dig Period-Low Freq 1 Ctr.vi"
also from the example folder, gives an error:
======
err -1073807339 occurred at VISA Read in
DAQmxBase Read USB-621x (Counter U32 1Chan 1Samp).vi:3->
DAQmxBase Read USB-621x (Counter DBL 1Chan 1Samp).vi ->
DAQmxBase Read(Counter DBL 1Chan 1Samp).vi:1->
Meas Dig Period-Low Freq 1 Ctr.vi
Possible reason(s):
VISA: (Hex 0xBFFF0015) Timeout expired before operation completed.
=======
The error was received immediately after the VI was run. The default timeout
was 10 seconds. I changed the timeout to 30 seconds with no effect.
The signal from the tachometer is connected to Terminal 1 (PFI 0) and D GND on
NI-USB 6210.
As I mentioned, I am using NI USB 6210 with LabView 2011 on Mac OS X 10.7.4 (MacBook Pro, May2012 release). I installed all the drivers (NI-DAQmx base 3.5, NI-VISA-5.1.2, and NI 488.2) first, then I installed Labview 2011 excluding NI-VISA that was supplied by the DVD.
Regards,
Alex
