HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 261)

245 HEIDENHAIN TNC 410, TNC 426, TNC 430
9.5 Nesting
9.5 Nesting
You can nest subprograms and program section repeats in the
following ways:
■ 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 calling main programs: 4
■ You can nest program section repeats as often as desired
Subprogram within a subprogram
Example NC blocks
%UPGMS G71 *
...
N170 L1.0 *
...
N350 G00 G40 Z+100 M2 *
N360 G98 l1 *
...
N390 L2.0 *
...
N450 G98 L0 *
N460 G98 L2 *
...
N620 G98 L0 *
N999999 %UPGMS G71*
Subprogram at label G98 L1 is called
Last program block of the
main program (with M2)
Beginning of subprogram 1
Subprogram at label G98 L2 is called.
End of subprogram 1
Beginning of subprogram 2
End of subprogram 2
Lkap9.pm6 29.06.2006, 08:07 245