TDMS Splitting the file

[sts123]

In task there is the option to split the file by spanning multiple files over the given number of samples.

 

Any chance I can do this with the LabVIEW code, so I have control over the file names and samples per file?

 

 

R_R_9_MTDS_2.vi

[sts123]

So effectively I want to create a variables with file path and samples number.

 

[ShaunR]

Something like this?

file increment.vi

[cordm]

Use the builtin TDMS logging function and set the samples per file via property node (DAQmx Read class): https://www.ni.com/docs/en-US/bundle/ni-daqmx/page/multiplefiles.html

R_R_9_MTDS_2_CM.vi

[sts123]

I've done it like this. Not sure if this is efficient and can avoid missing samples during split. I am using high sampling rates.

 

 

RR_Spliting_2.vi

[sts123]

At the moment, when the tdms i split, every individual fiel has time stamp reset to 0 at the start. Is is possible to do it the way that each file has time stamps that are continuing without disruption right from the beginning?

 

[cordm]

I don't think that's true. Most likely a problem with the exporting.

[sts123]

4 hours ago, cordm said:

I don't think that's true. Most likely a problem with the exporting.

You were right. How I could check if the there is not samples missing in-between splitting?

 

This is my exporting vi:

 

 

to_Asci_3_range_2.vi

[cordm]

I don't see why there should be samples missing. If writing cannot keep up with acquisition, the DAQmx buffer will overflow and you get an error during acquisition. If you doubt your own code, use the built-in DAQmx logging shown above.

Otherwise, use NI_MABase.lvlib::ma_time continuity checker.vi to to build a continuity checker for waveforms