Siemens SINUMERIK 828D

Flexible NC programming
1.25 Subprogram technique
Job planning
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
177
General conditions
When making a return jump through several program levels, the SAVE instructions of the
individual program levels are evaluated.
If, for a return jump over several program levels, a modal subprogram is active and if in one
of the skipped programs the de-selection command
MCALL is programmed for the modal
subprogram, then the modal subprogram remains active.
CAUTION
The programmer must carefully ensure that for a return jump over several program levels,
the program continues with the correct modal settings. This can be achieved, e.g. by
programming an appropriate main block.
Examples
Example 1: Resuming in the main program after ASUB execution
Programming Comment
N10010 CALL "UP1" ; Program level 0 (main program)
N11000 PROC UP1 ; Program level 1
N11010 CALL "UP2"
N12000 PROC UP2
;
Program level 2
...
N19000 PROC ASUB ; Program level 3 (ASUB execution)
...
N19100 RET("N10900", ,$P_STACK) ; Subprogram return.
N10900 ; Resumption in main program.
N10910 MCALL ; Deactivate modal subprogram.
N10920 G0 G60 G40 M5 ; Correct additional modal settings.