Hi Anne,
Most every program which supports CSV supports the TAB too. And not to have problems with locale settings for the separators we decided to choose the TAB. But if you are working with a script you can set the separator by your own. Than please use the following syntax:
Call DATAFILESAVESEL("<*filename*>filename.csv<*/filename*><*delimiter*>,<*/delimiter*>","CSV","'[1]/Time - '[1]/Speed")
Currently it is not possible to choose the separator in general or for interactive working in DIAdem.
Greetings Walter
PS (Please remove the * it's just because of the HTML editor)