HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 181)

6-3 TNC 426/TNC 425/TNC 415 B/TNC 407
6 Subprograms and Program Section Repeats
6.1 Subprograms
Programming and calling subprograms
Mark the beginning:
Select the label setting function.
LABEL NUMBER?
The subprogram begins with (for example) label number 5.
Resulting NC block: G98 L5 *
Mark the end:
A subprogram always ends with label number 0.
Select the label setting function.
LABEL NUMBER?
End of subprogram.
Resulting NC block: G98 L0 *
Call the subprogram:
A subprogram is called by its label number.
Call the subprogram behind label 5.
Resulting NC block: L5,0 *
The command L0,0 is not permitted (label 0 is only used to mark the end of a subprogram).
9 8
L
ENT
G
5 END 0
0 END
G 8 ENT 9
END 5