HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 238)

Programming: Subprograms and program section repeats
8.3 Program-section repeats
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
Calling a program section repeat
Press the LBL CALL key
To call subprograms/section repeats: Enter the
label number of the subprogram to be called,
then confirm with the ENT key. If you want to
use a label name, press the " 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: Enter the number of repeats, then
confirm with the ENT key