Siemens SINUMERIK 840D sl Function Manual page 849

WCS: Workpiece Coordinate System
SZS: Settable Zero System
BZS: Basic Zero System
BCS: Basic Coordinate System
MCS: Machine Coordinate System
PCS: Part Coordinate System
ACS: Adjustable Coordinate System
FCS: Foot Coordinate System
BCS: Basic Coordinate System
MCS: Machine Coordinate System
The current complete frame is calculated according to the formula below:
$P_ACTFRAME =
Basic logic functions: Axes, coordinate systems, frames (K2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
$P_PARTFRAME : $P_SETFRAME : $P_EXTFRAME :
$P_ISO1FRAME : $P_ISO2FRAME : $P_ISO3FRAME :
$P_ACTBFRAME : $P_IFRAME :
$P_TOOLFRAME : $P_WPFRAME : $P_TRAFRAME:
Detailed description
2.4 Frames
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