Siemens SINUMERIK 840Di Function Manual page 747

Note
The gaps count as axes with reference to the number of channel axes and their indices.
If an attempt is made to define a channel axis gap on the geo axis via the machine data
MD20050 AXCONF_GEOAX_ASSIGN_TAB,
the attempt is rejected without an alarm.
Using channel axes in
MD24120ff. TRAFO_GEOAX_ASSIGN_TAB1...8
and
MD24110ff. TRAFO_AXES_IN1...8,
to which no machine axes are defined using
MD20070 AXCONF_MACHAX_USED
(gap), triggers alarms 4346 or 4347.
2.1.12 Link axes
Link axes are axes, which are physically connected to another NCU and whose position is
controlled from this NCU. Link axes can be assigned dynamically to channels of another
NCU. Link axes are not local axes from the perspective of a particular NCU.
The axis container concept is used for the dynamic modification of the assignment to an
NCU. Axis replacement with GET and RELEASE from the part program is not available for link
axes across NCU boundaries.
Requirements:
• The participating NCUs, NCU1 and NCU2, must be connected by means of high-speed
References:
/PHD/ Configuring Manual NCU 571-573.2; Link Module
• The axis must be configured appropriately by machine data.
• The link axis option must be installed.
Axis Types, Coordinate Systems, Frames (K2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
communication via the link module.
Detailed Description
2.1 Axes
2-17