6
Frames 12.98
6.5 External zero offset
6
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di
ï›™
Siemens AG 2000. All rights reserved
6-206
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
6.5 External zero offset
External zero offset
This is another way of moving the zero point
between the basic and workpiece coordinate
system.
Only linear translations can be programmed with the
external zero offset.
Programming offset values, $AA_ETRANS
The offset values are programmed by assigning the
axis-specific system variables.
Assigning offset value
$AA_ETRANS[axis]=R
I
R
I
is the arithmetic variable of type REAL which
contains the new value.
The external offset is generally set by the PLC and
not specified in the part program.
Y
MCS
Y
MCS
X
MCS
Y
BCS
X
BCS
Y
BOS
X
BOS
Y
SZS
X
SZS
Preset offset
Kinematic transformation
DRF offset
External zero offset
G54...G599
Basic frame
The value entered in the part program only becomes
active when the corresponding signal is enabled at
the VDI interface (NCU-PLC interface).
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