HEIDENHAIN iTNC 530 283
8.5 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 L 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
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