HEIDENHAIN iTNC 530 (340 49x-06) ISO programming - Manual (Page 250)

250 Programming: Subprograms and Program Section Repeats
8.5 Nesting
8.5 Nesting
Types of nesting
„ Subprograms within a subprogram
„ Program section repeats within a program section repeat
„ Subprograms repeated
„ Program section repeats within a subprogram
Nesting depth
The nesting depth is the number of successive levels in which
program sections or subprograms can call further program sections or
subprograms.
„ Maximum nesting depth for subprograms: 8
„ Maximum nesting depth for main program calls: 6, where a G79 acts
like a main program call
„ You can nest program section repeats as often as desired