Siemens SINUMERIK 840D sl Programming Manual page 211

$P_PFRAME
Current, programmable frame variable that establishes the reference between the settable
zero system (SZS) and the workpiece coordinate system (WCS).
$P_PFRAME contains the resulting frame, that results
• from the programming of TRANS/ATRANS, ROT/AROT, SCALE/ASCALE,
• from the assignment of CTRANS, CROT, CMIRROR, CSCALE to the programmed
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
MIRROR/AMIRROR or
FRAME
6.1 Coordinate transformation via frame variables
Frames
6-5