How can I modify the High Speed Data Reader VI to show correct time informatio​n in x-axis?

I am just a beginner learning the LabVIEW programming currently.
I have a PXI 6115 DAQ card and have to make a hardware timed acquisition VI for maximum performance. Thus I use the High Speed Data Logger VI for data acquisition.
However, when I read my data by using the High Speed Data Reader VI, it doesn't show its correct time information in the graph.
How can I modify the High Speed Data Reader VI to show correct time information in x-axis?
I hope you can explain easily because I am a beginner.

Hey Chunrok,
I've modified the High Speed Data Reader VI slightly so that it now uses the scan rate of the data (as determined from the file) to set the scaling for the data points. If you wanted the start time to be a specific time you could use the start time obtained from your file to set the xscale offset as well.
I hope this helps!
Sarah Miracle
National Instruments
Attachments:
Example.vi ‏281 KB

Similar Messages

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    I am just a beginner learning the LabVIEW programming currently.
    I have a PXI 6115 DAQ card and have to make a hardware timed acquisition VI for maximum performance. Thus I use the High Speed Data Logger VI for data acquisition.
    However, when I read my data by using the High Speed Data Reader VI, it doesn't show its correct time information in the graph.
    How can I modify the High Speed Data Reader VI to show correct time information in x-axis?
    I hope you can explain easily because I am a beginner.

    First, I couldn't seem to find that example either on computer or on the NI sites.
    The problem that we're running into is stated in the article that I pointed to - when real time VIs are running, then the OS will stop updating the OS clock. TO us it looks like the clock is losing time. There is a hardware clock on the PXI and it is read only during boot up to set the OS clock. Our discussions with NI have not led to a solution for this problem without checking the time on start and then checking the tick count (which does not lose time) and calculating what the current time is. No access to the hardware clock is supplied.
    We're still working on a simpler way to get accurate time.
    Rob

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    I am just a beginner learning the LabVIEW programming currently.
    I have a PXI 6115 DAQ card and have to make a hardware timed acquisition VI for maximum performance. Thus I use the High Speed Data Logger VI for data acquisition.
    However, when I read my data by using the High Speed Data Reader VI, it doesn't show its time information in the graph.
    How can I modify the High Speed Data Reader VI to show the time information in x-axis?
    I hope you can explain easily because I am a beginner.

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