Data for the graph economy waveform

Hello

I'm trying to collect the data of temperature with the attached VI. Everything works fine until I open the exported file that contains only the last point of the chart. I already had this problem and I think that it is quite common, but I can't find how to solve it.

Thank you very much for your help!

Here's what you do.  The central loop is where you get several waveforms.  You want to write each waveform in the output file, which means you want the wave form to write to the worksheet in the Central loop.  Look at its inputs and outputs - put three of them, the file Path/New path, add to the file? and the header? on the shift registers.  Initialize (wants to say wire the register shift outside the While loop) the path of the file to "data\test" (as you've already done), with the new path towards the "output" Shift Register Terminal.  False (the default) of thread to add to the file? and true (if you want headers) to headers?  On the side of the "output" of these two SHIFT registers, wire to 'Add to the file?' "True" and "False" to "Headers?

For the first time you run the intermediate loop, the file will be opened in a new file (since add to the file? is false) and a possibly written header.  All subsequent calls will add data in the same file (because you wired "True" to add to the file on the output terminal) and no header.

And to get rid of the unnecessary frame at the end – data flow will be responsible for sequencing.

Bob Schor

Tags: NI Software

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