Measure write different time

Hi:
I would like to measure data every 200ms, but only every 600ms I want to write this data in an excel sheet. Does anybody know how to solve it?
I tried it with two while loops with different timers, but this doesn't work.
Please see my attached VI.
Thank you!
Attachments:
test_Datenerfassung.vi ‏20 KB

You've posted this question to the Dynamic Signal Acquisition board instead of the LabVIEW board.
Your main problem is that you have the file write outside the loop where you are generating the data. This cannot work. The file write loop will not receive any data from the other loop until the other loop finishes. The ay you have it wired, the file write loop would also only get the result of the very last iteration of the other loop. These are basic dataflow principles in LabVIEW.
You can place an elaspsed time function in the main loop set to 600 msec and put the file write inside a case statement. Wire the Time has Elapsed output to the case statement. You could also use the Quotient and Remainder function in a manner as shown below to write every third iteration.
Message Edited by Dennis Knutson on 08-13-2007 08:10 AM
Attachments:
Write Every Third Iteration.PNG ‏3 KB

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evolution wrote in message news:<[email protected]>...
> How can I save my data and the date,the time into the same file when
> I run this VI at different times?
>
> I use a translation stage for the experiment.For each user in the lab
> the stage position (to start an experiment) is different.I defined one
> end of the stage as zero. I want to save the position , date and time
> of the stage with respect to zero.I want all these in one file, nd
> everytime I run it it should save to the same file, like this:
> 2/12/03 16:04 13567
> 2/13/03 10:15 35678
>
> So I will track the position from day to day.If naybody helps, I
> appreciate it.Thanks.
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