HEIDENHAIN iTNC 530 (34049x-08) - Manual (Page 293)

HEIDENHAIN iTNC 530 293
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
 To mark the beginning, press the LBL SET key
 Enter the subprogram number. If you want to use a
label name, press the LBL NAME soft key to switch
to text entry
 To mark the end, press the LBL SET key and enter the
label number "0"
Calling a subprogram
 To call a subprogram, press the LBL CALL key
 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
 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).