What is a "parameter of waveform dt < = 0' error?"

I need to follow a signal square using a PXI-6221. Currently I use it to take a waveform of 500000-sample, which is then sent to "Extract information your unique" to find the frequency. The frequency is then written into a spreadsheet file.

Initially, I used this VI with the PXI-6221 in a PXI-1000 b with a PXI - 8156B controller. The VI I had written to perform the above tasks has been saved as a LV 7.1 executable. There is no error while running VI and the frequency of approximately 3 kHz was estimated to about 20 Hz. Then, I decided to use the exact same VI and map in an SMU-1065 chassis using a MXI-Express for PC bridge. Of the shot, if I used a LV 7.1 exe or even VI saved under 8.6, 8.0, or 7.1, it gave me the same error whenever the VI reached the point where it had to assess the frequency of the signal: ' dt waveform parameter<>

-PXI - 8156B is a processor 233 MHz running under Win.NT.

-The PC is a relatively new model running on Win XP.

-When I access the PXI-6221 test panel and manually run the test, I see a set of square waves appear on the chart as expected.

-L' exact same error when I replace it with a PXI-6259 for PXI-6221.

-The voltage of the signal moves between-5 and 0 V.

-When an analysis of different frequency VI is used the same problem occurs.


You have no frequency clock value.  When your VI runs, the waveform in the half superior as a dt value of zero.

Tags: NI Software

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