Siemens SINUMERIK 840D sl Function Manual page 682

K2: Axis Types, Coordinate Systems, Frames
10.4 Coordinate systems
Coordinate systems
The following coordinate systems are defined for machine tools:
Coordinate system
Machine Coordinat System
Basic Coordinate System
Basic Zero System
Settable Zero System
Workpiece Coordinate System
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Abbreviation
MCS
BCS
BZS
SZS
WCS
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions