HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 182)

Programming: Subprograms and program section repeats
7.5 Nesting
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TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
Subprogram within a subprogram
Example NC blocks
0 BEGIN PGM UPGMS MM
...
17 CALL LBL “SP1“
Call the subprogram marked with LBL SP1
...
35 Z+100 R0 FMAX M2
Last program block of the main program with M2
36 LBL “SP1“
Beginning of subprogram SP1
...
39 CALL LBL 2
Call the subprogram marked with LBL 2
...
45 LBL 0
End of subprogram 1
46 LBL 2
Beginning of subprogram 2
...
62 LBL 0
End of subprogram 2
63 END PGM UPGMS MM
Program execution
1 Main program UPGMS is executed up to block 17.
2 Subprogram SP1 is called, and executed up to block 39.
3 Subprogram 2 is called, and executed up to block 62. End of
subprogram 2 and return jump to the subprogram from which it
was called.
4 Subprogram 1 is called, and executed from block 40 up to block
45. End of subprogram 1 and return jump to the main program
UPGMS.
5 Main program UPGMS is executed from block 18 up to block 35.
Return jump to block 1 and end of program.