TDMS files

[KS200]

Hello, I want to log data into a TDMS file every time I click a button, but the file is being created multiple times.

Thank you, 

[GerdW]

Hi KS200,

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@KS200 wrote:

Hello, I want to log data into a TDMS file every time I click a button, but the file is being created multiple times.

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Because that's what you do in your VI: create a new TDMS file using the timestamp in the filename…

When you want to log into one (1) file then you should create the file once before the loop!

[KS200]

Thank you. If I want to create a new file each time I click a button, how do I do that? Because when I try to create it before the loop, only one file is created. If I click the button again, no other file is created.

[GerdW]

Hi KS200,

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@KS200 wrote:

Thank you. If I want to create a new file each time I click a button, how do I do that?

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Then you create a new file when you click the button (inside a case structure).

Hint: Use a latching button on your front panel…

[ZYOng]

You can use Boolean Crossing PtByPt VI to detect the rising edge of your shared variable signal.

[KS200]

Hello, I tried both solutions and I can create a file each time I click the button, but the file only contains one value each time. How can I fix that? Thank you.

[GerdW]

Hi KS,

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@KS200 wrote:

the file only contains one value each time. How can I fix that?

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Write more data/samples to the file!

Maybe the more reasonable help would be to analyze your code. Unfortunately you don't show it to us…

[KS200]

Hello, I am using this VI, thank you 

[GerdW]

Hi KS,

please downconvert your VI and attach again.

(Many of use don't use the latest LabVIEW versions due to license issues, so you should downconvert to LV2021 or older. I prefer LV2019.)

[KS200]

Hello, I am going to look into how I can do that. In the meantime, here is an image of the VI. Thank you.