Save output from waveform into a text file when VI is running continuously?

[armendzh]

How can I save output from waveform into a text file when I run my VI continuously?

I am doing power profiling and want to save voltage drop measurements continuely.

[vt92]

Use a producer/consumer architecture. 

http://www.ni.com/white-paper/3023/en

As a side note, I hope you don't literally mean that you are using the "run continously" button.

[armendzh]

Well.. Yes. I do mean "run continously" button. Is it a problem?

I just want the voltage supplies to be on (so that the device which I try to power profile doesn't turn off... to avoil setting it up for each measurement).

However, placed enable/ disable button connected to "Write To Measurement File" module. I also would like to enter some logic to perform measurement for number of seconds, but I am not sure what I can use.

[JÞB]

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@armendzh wrote:

Well.. Yes. I do mean "run continously" button. Is it a problem?

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Yes that is a problem,  Run Continuously is a debug feature simillar to abort.  you should not normally run a vi this way.  A while loop after your set-up code to repeat a measurement is the preferred method.

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I just want the voltage supplies to be on (so that the device which I try to power profile doesn't turn off... to avoil setting it up for each measurement).

However, placed enable/ disable button connected to "Write To Measurement File" module. I also would like to enter some logic to perform measurement for number of seconds, but I am not sure what I can use.

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Lets see what you have- we can understand what we are triing to help with a lot easier that way.

[armendzh · Accepted solution]

Oh.. I see. I wasn't aware of this.

This is my first time using LabVIEW, so I used one of the example files. In there, I just added "Write To Measurement File" with input Total Current... and because I was using using "run continuously" buttom, I added the enable button to control when I write measurement file.

However, ideally, I want to make it run for x seconds or x minutes and then stop without powering off the device which is connected to Battery Simulator from NI. Right now, its resetting the device whenever I hit "run" buttom, which makes me set up device for particular test I want to measure again.