HEIDENHAIN iTNC 530 (606 42x-02) - Manual (Page 289)

HEIDENHAIN iTNC 530 289
8.2 Subpr
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8.2 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 CALL LBL
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 M2 or M30)
„ If subprograms are located before the block with M2 or M30, they
will be executed at least once even if they are not called
Programming a subprogram
U To mark the beginning, press the LBL SET key
U Enter the subprogram number. If you want to use a
label name, press the LBL NAME soft key to switch
to text entry
U To mark the end, press the LBL SET key and enter the
label number “0”
Calling a subprogram
U To call a subprogram, press the LBL CALL key.
U Call subprogram /repeat : Enter the label number of
the subprogram you wish to call. If you want to use a
label name, press the LBL NAME soft key to switch
to text entry If you want to enter the number of a
string parameter as target address: Press the QS soft
key; the TNC will then jump to the label name that is
specified in the string parameter defined.
U Repeat REP : Ignore the dialog question with the NO
ENT key. Repeat REP is used only for program
section repeats.
CALL LBL 0 is not permitted (Label 0 is only used to mark
the end of a subprogram).