Siemens sinumerik 840d Programming Manual page 194

Frames
6
6.1 Coordinate transformation via frame variables
840D 840D
NCU 571 NCU 572
NCU 573
$P_IFRAME
Current, settable frame variable that establishes the
reference between the basic origin system (BOS)
and the settable zero system (SZS).
$P_IFRAME corresponds to $P_UIFR[$P_IFRNUM]
After G54 is programmed, for example, $P_IFRAME
contains the translation, rotation, scaling and
mirroring defined by G54.
$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 frame resulting from the
programming of TRANS/ATRANS, ROT/AROT,
SCALE/ASCALE, MIRROR/AMIRROR or the
assignment of CTRANS, CROT, CMIRROR,
CSCALE to the programmable FRAME.
$P_ACTFRAME
Current total frame resulting from chaining of the
current base frame variable $P_BFRAME, the current
settable frame variable $P_IFRAME and the current
programmable frame variable $P_PFRAME.
$P_ACTFRAME describes the currently valid
workpiece zero.
If $P_IFRAME, $P_BFRAME or $P_PFRAME are
changed, $P_ACTFRAME is recalculated.
$P_ACTFRAME corresponds to
$P_BFRAME:$P_IFRAME:$P_PFRAME
6-194
FM-NC 810D 840Di
Z
SZS
Z
BOS
Z
SZS
Z
BOS
Z
Z
ENS
BKS
Z
BNS
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
12.98
6
Y
SZS
Y
BOS
X
SZS
X
BOS
Z
WCS
Y
SZS
Y
BOS
Y
WCS
X
WCS
X
SZS
X
BOS
Z
WKS
Y
ENS
Y
BNS
Y
WKS
X
WKS
X
ENS
X
BNS
X
BKS
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