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Siemens SINUMERIK 840D Operator's Manual Page 188

Computerized numerical control system for machine tools.
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Parameters Operating Area
5.8 Zero offset
Settable WO
Programmable WO
External WO
DRF offset
Frame components
You can activate a settable zero offset in the program you have called
with G54 to G57 and other G functions or with $P_IFRAME=...
Basic zero offset (basic frame): Is displayed like a settable WO.
You can use the programmable zero offset $P_PFRAME=.. to
program an additional work offset for geometry and special axes in
the part program you have called.
The values of the programmed work offsets are deleted with end of
program or reset.
In addition to all the offsets which define the position of the workpiece
zero point, an external zero offset can be overlaid by means of the
handwheel (DRF offset) or from the PLC.
Differential Resolver Function: An NC function which generates an
incremental zero offset in automatic mode in conjunction with an
electronic handwheel.
Frame is the conventional term for a geometrical expression that
describes an arithmetic rule, such as translation or rotation.
Frames are used to describe the position of a destination coordinate
system by specifying coordinates or angles starting from the current
workpiece coordinate system.
Possible frames
Basic frame (basic offset)
Settable frames (G54...G599)
Programmable frames
/PGA/ Programming Guide Advanced
Frame components
A frame can consist of the following arithmetic rules:
Zero point offset, TRANS, ATRANS
Rotation, ROT, AROT
In the part program, all work offsets can be deselected non-modally
with G53.
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
 Siemens AG, 2004. All rights reserved


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