HEIDENHAIN TNC 320 (340 551-02) - Manual (Page 319)

HEIDENHAIN TNC 320 319
9.2 Subpr
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gr
ams
9.2 Subprograms
Operating sequence
1 The TNC executes the part program up to the block in which a
subprogram is called with CALL LBL.
2 The subprogram is then executed from beginning to end. The
subprogram end is marked LBL 0.
3 The TNC then resumes the part program from the block after the
subprogram call.
Programming notes
„ A main program can contain up to 254 subprograms.
„ You can call subprograms in any sequence and as often as desired.
„ A subprogram cannot call itself.
„ Write subprograms at the end of the main program (behind the block
with M02 or M30).
„
If subprograms are located before the block with M02 or M30, they
will be executed at least once even if they are not called.
Programming a subprogram
8 To mark the beginning, press the LBL SET key.
8 Enter the subprogram number.
8 To mark the end, press the LBL SET key and enter the
label number “0”.
Calling a subprogram
8 To call a subprogram, press the LBL CALL key.
8 Label number: Enter the label number of the
subprogram you wish to call. If you want to use a label
name, press the ” key to switch to text entry.
8 Repeat REP: Ignore the dialog question with the
NO ENT key. Repeat REP is used only for program
section repeats.
0 BEGIN PGM ...
CALL LBL1
L Z+100 M2
LBL1
LBL0
END PGM ...
CALL LBL 0 is not permitted (Label 0 is only used to mark
the end of a subprogram).