FADAL VMC 3020 Operator's Manual page 30

SIEMENS CONTROL
Fadal
Operator Manual
The Work Coordinate System (WCS) - The workpiece coordinate system is
based on the MCS with offsets to shift the workpiece to zero. Workpiece
programming is done in WCS using the workpiece axes designations X, Y,
Z, A and B. The WCS includes all active offsets including the Base Offset,
Settable Work (Zero) Offset and the Tool Offset.
In the MANUAL operating mode it is possible to change between the WCS
and MCS by toggling the Act. Val. MCS soft key.
30 Fadal/Sinumerik 810D CNC: Settable Frames - Workpiece Offsets October 2000