Siemens SINUMERIK 840D sl Function Manual page 662

K2: Axis Types, Coordinate Systems, Frames
10.1 Brief description
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 $MC_AXCONF_GEOAX_ASIGN_TAB (assignment of geometry axis to channel
axis)
MD20060 $MC_AXCONF_GEOAX_NAME_TAB (name of the geometry axis in the channel)
MD20070 $MC_AXCONF_MACHAX_USED (machine axis number valid in channel)
MD20080 $MC_AXCONF_CHANAX_NAME_TAB (name of the channel axis in the channel)
MD10000 $MN_AXCONF_MACHAX_NAME_TAB (machine axis name)
MD35000 $MA_SPIND_ASSIGN_TO_MACHAX (assignment of spindle to machine axis)
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:
Function Manual, Extended Functions; Several 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.
This type of reference consists of:
● Axis container number
● A slot (circular buffer location within the corresponding container)
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions