Ncu Global Frames - Siemens SINUMERIK 840D sl Programming Manual

5.7

NCU global frames

5.7
Function
Only one set of NCU global frames is used for all channels on each NCU. NCU global
frames can be read and written from all channels. The NCU global frames are activated in
the respective channel.
Channel axes and machine axes with offsets can be scaled and mirrored by means of global
frames.
Geometrical relationships and frame chains
With global frames there is no geometrical relationship between the axes. It is therefore not
possible to perform rotations or program geometry axis identifiers.
● Rotations cannot be used on global frames. The programming of a rotation is denied with
● It is possible to chain global frames and channel-specific frames. The resulting frame
NCU-global frames
NCU-global basic frames $P_NCBFR[n]
Up to eight NCU-global basic frames can be configured:
Channel-specific basic frames can also be available.
Global frames can be read and written from all channels of an NCU. When writing global
frames, the user must ensure channel coordination. This can be achieved using wait
markers (WAITMC) for example.
Machine manufacturer
The number of global basic frames is configured using machine data, see
/FB1/ Function Manual Basic Functions; Axes, Coordinate Systems, Frames (K2).
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
alarm: "18310 Channel %1 Block %2 Frame: rotation not allowed" is displayed.
contains all frame components including the rotations for all axes. The assignment of a
frame with rotation components to a global frame is denied with alarm "Frame: rotation
not allowed".
Coordinate transformation (FRAMES)
5.7 NCU global frames
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