Siemens SINUMERIK 840D sl Function Manual page 1666

Detailed Description
2.3 Configurable gear adaptation
Block change
If the spindle is switched to oscillation mode
with NC/PLC IS:
DB31, ... DBX82.3 (Change gear), the processing of the part program remains suspended.
A new block is not executed.
If oscillation mode is terminated with NC/PLC IS:
DB31, ... DBX16.3 (Gear changed); the processing of the part program is resumed.
A new block is executed.
Figure 2-8
56
Block change following oscillation mode
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0