HEIDENHAIN TNC 320 (340 55x-05) ISO programming - Manual (Page 193)

HEIDENHAIN TNC 320 193
7.
5 Nesting
Repeating program section repeats
Example NC blocks
Program execution
1 Main program REPS is executed up to block 27
2 Program section between block 20 and block 27 is repeated twice
3 Main program REPS is executed from block 28 to block 35
4 Program section between block 15 and block 35 is repeated once
(including the program section repeat between 20 and block 27)
5 Main program REPS is executed from block 36 to block 50 (end of
program)
%REPS G71 *
...
N15 G98 L1 * Beginning of program section repeat 1
...
N20 G98 L2 * Beginning of program section repeat 2
...
N27 L2,2 * Program section between G98 L2 (block N20)
... and this block is repeated twice
N35 L1,1 * Program section between G98 L1 (block N15)
... and this block is repeated once
N99999999 %REPS G71 *