conditioned TDMS output

[shuishen1983]

I have three TDMS file opened and then data are saved on my hard disk. Is there any way to control when the saving action begins and ends?

By the way, can I combine three TDMS file into one with chanels separated?

[Bo_Xie · Accepted solution]

Your question: can I combine three TDMS file into one with chanels separated?

Answer: Refer to http://forums.ni.com/t5/DIAdem/Appending-tdms-files-problem/td-p/1121142
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You can concatenate large TDMS files using the Windows command prompt (you can choose to either delete the TDMS_INDEX files or concatenate them in the same order):

copy /b "C:\temp\0.tdms" + "C:\temp\1.tdms" + "C:\temp\2.tdms" "c:\temp\merged.tdms"
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Your question: Is there any way to control when the saving action begins and ends?

Answer:  Sorry I don't understand your question. There is only "TDMS Write", not TDMS Write Begin/End. You might put "TDMS Write" into a "True" case (not "False" case) of "Case Structure". Then you can set the selector terminal of "Case Structure" to control when to save data to tdms file. Does it make sense? 

[shuishen1983]

I think you are right about the case struture that is used to control the TDMS file write. mI will accept your solution.