Waveform capture frequency

[DougHallman]

Hello,

I have data signals that are polled every 100 ms that are used elsewhere for calculations. I also display these data signals after a bit of massaging as waveforms on the operators HMI. The operator also would like to take the data points from the waveform and bring it into excel for record keeping purposes. Now for the purpose of the calculations the polling period of 100 ms is good, however, the operator would like the waveform to have a period of 1s.  Is there a property node or similar function block which would allow the waveform function block to poll the data at a slower rate?

Thank you for the help.

[P@Anand]

I am not really sure what you meant by capturing the Waveform. What type of waveform are you acquiring and what is the sampling rate (Is it really 100 ms which means 10 samples/second?). It would be helpful if you can explain the scenario bit more and what exactly you are looking for.

[DougHallman]

By waveform I just mean a chart that displays the data points as a line on the display. And I have a signal coming in that is being sampled at 10 samples/second. However, I want the chart to only capture and display every 10th sample (but any other logic that uses the incoming signal to still be able to see 10 samples/second). Does that clarify it a bit better?

Thank you for the help.

[crossrulz · Accepted solution]

I don't usually recommend Express VIs, but there is a Sample Compression one in there that could do the job for you.