Program Section Repeats; Principle; Programming Notes - HEIDENHAIN TNC 370 User Manual

6 Subprograms and Program Section Repeats
L-
6.2 Program Section Repeats
As with subprograms, program section repeats are
marked with labels.
Principle
1
'-
The program is executed up to the end of the
labelled program section (block with CALL LBL) (0,
0).
Then the program section between the called LBL
and the label call is repeated the number of times
entered after REP in the CALL LBL command (0,
0).
After the last repetition, the program is resumed
(@.
0 BEGIN PGM
0
1
LBL 1
CALL LBL 1 REP 2/Z
0
5
END PGM
Programming notes
l
A program section can be repeated up to 65 534
times in succession.
l
The number behind the slash after REP indicates
Fig. 6.2:
Flow diagram with program section repeats, @= return
the number of remaining repetitions.
jump
l
The total number of times the program section
will be carried out is always one more than the
programmed number of repetitions.
Programming and calling a program section repeat
To mark the beginning
Repeat the program section beginning with LABEL 7.
Resulting NC block: LBL 7
Number of repetitions
Enter the number of repetitions in the block which calls the label. This
block also identifies the end of the program section.
LABELNIJMBER?
Execute the program section beginning with LABEL 7.
L
r
'"1
REX'EATREP?
>
Repeat the program section from LBL 7 to this block 10 times.
The oroaram section will therefore be executed a total of 11 times.
Resulting NC block: CALL LBL 7 REP IO/IO
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TNC 370
6-5
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