Siemens sinumerik 840D sl Operating Manual page 458

Programming technology functions (cycles)
8.7 Further cycles and functions ShopTurn
Parameters
Function, rear face
Work offset
ZW
ZV
Parameters
Function, front face
Work offset
458
Description
Work offset in which the coordinate system, which was shifted according to ZW
and by ZV as well as mirrored in Z, must be saved:
Basic reference

G54

G55

G56

G57

...

Machining position for special axis (abs.); Machine
Offset Z = 0
Workpiece zero is offset in Z direction (inc, the sign is also evaluated)
Description
Work offset for machining the next front face:
Basic reference

G54

G55

G56

G57

...

Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Unit
mm
mm
Unit
Turning