
The following graphic shows the function group context, and their possible connections to the application programs.

You use the function groups SNR0, SNR1, and SNR2 if you want to create programs for automatic maintenance or adaptation of number range objects. If, however, you want to work with the standard maintenance dialog (for interval maintenance) of a number range object, you have to implement function modules of the function group SNR3 in your application program to call the number assignment or the number check.