HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 580)

580 10 Programming: Subprograms and Program Section Repeats
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.1 Labeling Subpr
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ams and Pr
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am Section Repeats
10.1 Labeling Subprograms and
Program Section Repeats
Subprograms and program section repeats enable you to program a
machining sequence once and then run it as often as desired.
Labels
The beginnings of subprograms and program section repeats are
marked in a part program by labels.
A label is identified by a number between 1 and 999 or by a name you
define. Each LABEL number or LABEL name can be set only once in
the program with LABEL SET. The number of label names you can
enter is only limited by the internal memory.
LABEL 0 (LBL 0) is used exclusively to mark the end of a subprogram
and can therefore be used as often as desired.
If a LABEL name or number is set more than once, the
TNC sends an error message at the end of the LBL SET
block. With very long programs, you can limit the number
of blocks to be checked for repeated labels with MP7229.