Siemens Sinumerik 840D sl Programming Manual page 405

Example
The same cutting edge is used for 2 bearing seats:
Program code
N110 T7 D7
N120 G0 X10 Z1
N130 G1 Z-6
N140 G0 DL=2 Z-14
N150 G1 Z-21
N160 G0 X200 Z200
...
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Comments
; The revolver is positioned to location 7. D7 and DL=1
are activated and moved through in the next block.
; DL=2 is activated in addition to D7 and is moved through
in the next block.
; Approach tool change position.
Tool offsets
7.2 Additive offsets
405