HEIDENHAIN TNC 360 ISO Programming - Manual (Page 135)

6 Subprograms and Program Section Repeats
TNC 360 6-12
6.4 Nesting
5 2
2x 3
4
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Repeating subprograms
Program layout
% UPGREP G71 *
e.g. N10 G98 L1 *
N11 L2,0 * ................................................... Subprogram call
N12 L1,2 * ................................................... Program section repeat
e.g. N19 G00 G40 Z+100 M2 * .......................... Last program block of main program with M2
N20 G98 L2 * .............................................. Beginning of subprogram
e.g. N28 G98 L0 * .............................................. End of subprogram
N9999 % UPGREP G71 * ............................... End of main program
Sequence of program execution
Step 1: Main program UPGREP is executed to block 11.
Step 2: Subprogram 2 is called and executed.
Step 3: Program section between block 12 and block 10 is repeated
twice: subprogram 2 is repeated twice.
Step 4: Main program UPGREP is executed from block 13 to
block 19. End of program.