Siemens SINUMERIK 840Di Function Manual page 724

Brief Description
1.1 Axes
Synchronized axes
Synchronous axes are interpolated together with path axes (all path axes and synchronous
axes of one channel have a common path interpolator).
All path axes and all synchronous axes of a channel have the same acceleration phase,
constant travel phase and deceleration phase.
Axis configuration
The machine data below are used to assign the geometry axes, special axes, channel axes
and machine axes as well as the names of the individual axis types:
MD20050 AXCONF_GEOAX_ASIGN_TAB
MD20060 AXCONF_GEOAX_NAME_TAB
MD20070 AXCONF_MACHAX_USED
MD20080 AXCONF_CHANAX_NAME_TAB
MD10000 AXCONF_MACHAX_NAME_TAB
MD35000 SPIND_ASSIGN_TO_MACHAX
Replaceable geometry axes
The "Replaceable geometry axes" function allows the geometry axes in a grouping to be
replaced by other channel axes.
Axes that are initially configured as synchronous special axes in a channel can replace any
selected geometry axis in response to a program command.
Link axis
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.
The link axes are described in:
References:
/FB2/ Multiple Operator Panels on Multiple NCUs, Distributed Systems (B3)
Axis container
An axis container is a circular buffer data structure, in which local axes and/or link axes are
assigned to channels. The entries in the circular buffer can be shifted cyclically.
In addition to the direct reference to local axes or link axes, the link axis configuration in the
logical machine axis image also allows references to axis containers.
1-2
Axis Types, Coordinate Systems, Frames (K2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0