counter fails after long time...

[matte]

Hello... I´m trying to run enclosed vi with a PCI-MIO 16 E 1 board. The vi runs fine after upgrading to NI-DAQ 7.5. Before upgrading the vi took 100% CPU but is now down to 5%. The progran attempts to measure frequency and some analog parameters from a test machine we have. After several hours of running the program crashes with the error message "Error -200284 occured at DAQmx Read". I believe that the problem is caused by the digital signal I have. The digital signal is more of a pulse emitted by our test machine everytime the analog load signal passes through zero. My question is if I would be better off buying some signal conditioning that converts my analog signal to a true TTL signal (if yes then which ?) or if there is other ways to solve my problem ? (could this even be a faulty card ? ) Any help or pointer is appreciated.. Yours //Mattias (Counter ID DBL 1Chan N samp.vi"

[AshwaniS]

Hello Matte!

Maybe this might help you out with the error message you get:

Error code: - 200284
Description: Some or all of the samples requested have not yet been acquired.
Possible cause: The sampling rate is set too low or your DAQmx Read VI requires a longer timeout. This timeout error could also happen if a start trigger was never received or a task is configured for external timing and no clock is supplied.
Solutions: To wait for the samples to become available use a longer read timeout or read later in your program. To make the samples available sooner, increase the sample rate that you have specified

Best Regards

[UBAP]

Hi,
How do we increase the saming rate?
I am trying to measure the frequency of pulses coming onto my counter 0 of my PCI-6221. I think I am encountering a similar problem as the person who started the thread.

My question is, how do we increase the sampling rate?
(I am using the (shipped) example code "Meas Dig Frequency-Low Freq 1 Ctr.vi)

It returns garbage...


Thanks