HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 172)

172 Programming: Subprograms and program section repeats
7.
5 Nesting
Subprogram within a subprogram
Example NC blocks
Program execution
1 Main program SUBPGMS 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 executed from block 40 up to block 45. End of
subprogram 1 and return jump to the main program SUBPGMS
5 Main program SUBPGMS is executed from block 18 up to
block 35. Return jump to block 1 and end of program
0 BEGIN PGM SUBPGMS 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 SUBPGMS MM