HEIDENHAIN TNC 620 (73498x-01) ISO programming - Manual (Page 416)

416 Test run and program run
15.8 Optional pr
ogr
a
m-r
un int
e
rr
u
ption
15.8 Optional program-run
interruption
Application
The TNC optionally interrupts program run at blocks containing M1. If
you use M1 in the Program Run mode, the TNC does not switch off
the spindle or coolant.
U Do not interrupt program run or test run at blocks
containing M1: Set soft key to OFF
U Interrupt program run or test run at blocks containing
M1: Set soft key to ON