Data not showing up in Spreadsheet

[kl3158]

Hi,

I am attempting to acquire three signals into a single spreadsheet file. Two signals are acquired with the NI USB DAQ6001 and the other signal is acquried from a multimeter through a GPIB.

Whenever I save the tdms file, only one set of signals will save. I will either have all the resistance measurements and only the final measurements of the DAQ signals OR all of the DAQ signals and the final measurement of the resistance. I included a picture of the block diagram and front panel.

Thanks in advance!

[Dennis_Knutson · Accepted solution]

When you pass the evil dynamic data out of the while loop, you are only passing the very last result. I would suggest you convert the data to something real so that the auto-indexing will work the same way you are doing the meter.

[GerdW]

Hi kl,

I will … have all the resistance measurements and only the final measurements of the DAQ

Yes, that's how you programmed it…

Lesson learned: don't mix "good" datatypes (like DBL or array of DBL) with "bad" ones (like DDT = DynamicDataType)!

Lesson learned: don't mix autoindexing tunnels with non-autoinding ones!

(Possible) solution: do the saving in the loop.

Better solution: stay away from DDT… 😄

[kl3158]

Sorry- I am very new to LabVIEW.

How do I convert the dynamic data to something real?

[Dennis_Knutson]

That depends on what you want in the file. There are several Convert From ... functions. You can convert to DBL array, 2D array, waveform array, etc. Only the conversion to waveform data type will retain the timing information.

[kl3158]

I did convert to a DBL array and got it to work! Thank you!