How to save single data every finite time delay

[vonsin]

Hello, all

I built a vi in lavbiew to measure an optical power meter with rs232 port, and it works well, I can get real time signal(optical power vs time). However, I want to save single data every exactly 5 seconds, because we want to get the power value immediately after optical wavelength changes which is set at every 5 seconds. I know the labview and write to file will take some time, I am just wondering is it possible to implement this, or is there some other ways to do this.

Thank you.


vonsin

[Steve.Briggs]

Hey Vonsin,

This is a very simple procedure.  All you need to do is have a wait command for 5 seconds inside a while loop where your save information and VIs are.  These commands are found in .the Timing function VIs under Programming.

Regards

[Pnt]

You can use

-the "Wait until Next ms Multiple" but not the "Wait ms" (see Labview help for the difference)

-A event structure with a timeout every 5 sec.

 -A timed Loop with a period of 5 sec.

Pick one...

5 sec is a VERY long time, so you should not have any problems