HEIDENHAIN TNC 426 (280 476) - Manual (Page 375)

348 9 Programming: Subprograms and Program Section Repeats
9.5 Nesting
Repeating a subprogram
Example NC blocks
Program execution
1 Main program SUBREP is executed up to block 11.
2 Subprogram 2 is called and executed.
3 Program section between block 12 and block 10 is repeated twice.
This means that subprogram 2 is repeated twice.
4 Main program UPGREP is executed from block 13 to block 19. End
of program.
0 BEGIN PGM SUBREP MM
...
10 LBL 1 Beginning of program section repeat 1
11 CALL LBL 2 Subprogram call
12 CALL LBL 1 REP 2/2 The program section between this block and LBL1
... (block 10) is repeated twice
19 L Z+100 R0 FMAX M2 Last block of the main program with M2
20 LBL 2 Beginning of subprogram
...
28 LBL 0 End of subprogram
29 END PGM SUBREP MM