HEIDENHAIN TNC 320 (34055x-06) - Manual (Page 222)

Programming: Subprograms and program section repeats
7.2 Subprograms
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TNC 320 | User's Manual HEIDENHAIN Conversational Programming | 5/2013
Calling a subprogram
To call a subprogram, press the LBL CALL key
Label number: 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).