Yes, IF you have CX-Designer V2.1 or higher and the NS display is loaded with V7.0.
The new MultiFunction pushbutton has selection for transferring data between the DataBlock CSV file and the field addresses assigned in the DataBlock group setting.
In the MultiFunction object select "Object Control" -->> "Data Block Control".
See attachment from CX-Designer manual.
Forgot to mention that the "Command" button object can also perform similar Data Block control functions.