Case structure and event structure with an indicator (boolean) condition

[apok]

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@SEGIO wrote:

The problem is that I don't know how to close TDMS file completely, because I want to replace this TDMS file by the TDMS file generated in next acquisition.

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ok, you still did not answer the questions completely ( about cycling,terminate, user interface?)...this vi will (step by step):

• goto case statement 'acquisition1' and write data for 2 mins. , then close file in T/F case statement, goto case statement 'wait'
• wait for 5 mins goto case statement 'acquisition2'
• generate TDMS random data for 2 mins, goto 'wait'
• cylcle through 'wait' and 'generate random data'.....

by the way,it is always a good practice to type def your case statement enums incase you have to add more statement commands...

Spoiler

[SEGIO]

I don't know why you put an other state (acquisition 2). I've implemented your program and I can't see that last file is replaced. It's like acquisition has finished and it doesn't go on.

Otherwise, why I can not do that like this (open file and close file in case structures, in acquisition state), and leaving only 2 states (acquisition and wait)?

Thank you for your help

[apok]

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@SEGIO wrote:

I don't know why you put an other state (acquisition 2). I've implemented your program and I can't see that last file is replaced. It's like acquisition has finished and it doesn't go on.

Otherwise, why I can not do that like this (open file and close file in case structures, in acquisition state), and leaving only 2 states (acquisition and wait)?

Thank you for your help

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• i added acq2 because you wanted "to replace this TDMS file by the TDMS file generated in next acquisition."
• your vi is constantly opening a TDMS reference, because the elapsed timer outputs a false for 2 mins...not good!, leave it on the outside of the while loop

if you write a step by step explanation of sequences of what exactly you want done here...we can better understand your intentions

[SEGIO]

Ok...I understand, thanks. But I've implemented your program and it doesn't work as I would like to, because the file created is not replaced. Have you run it?

[apok]

ok...is this what you want?

• case acqusition: create or replace file, write to file for 2 mins, close file
• case wait: for 5 mins
• case acquisition: replace file???...., write to file for 2 mins, close file

[SEGIO]

Yes, I'm sorry. And know I've seen that in case acquisition 2 there isn't close file, maybe it's the reason of it's not working.

Sorry and thanks 

[SEGIO]

Have a look at the .llb that I've upload, it's yours but changing acq2 and adding a signal generated. The problem as you can see is that the second acq is not done, I can only see the first tdms file generated.

Thanks 😉

[apok]

i see what you are doing...i am trying to understand you here

is what you are doing is what i had mentioned in the previous post?...replace the file at every acquisition, then wait?

[SEGIO]

I want to make an acquisition of 2 minutes. Then stop 5 minutes (at this time I want to send the file generated previously using FTP). After this 5 minutes, start an other acquisition of 2 minutes replacing the file that was created in the first acquisition (because I've sent this file from to RT to PC, so I don't mind if it's replaced). And I want to do that infine times until I put stop 😉

[apok]

see if this is what you want...

Spoiler