Siemens SINUMERIK 840D Function Manual page 802

S1: Spindles
18.4 Configurable gear adaptations
GSC at fixed position
Typical time sequence for the gear stage change at fixed position:
t :
1
t :
2
t :
3
802
With the programming of S1300, NC detects a new gear stage (second gear stage), sets IS
DB31, ... DBX84.5 (positioning mode) and blocks processing for the next part program block (=
internal feed disable*).
The spindle is stationary, and exact stop is signaled.
Gear stage change - wait time
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA