Siemens SINUMERIK 840D sl Function Manual page 145

Differentiation between local/link axes
To enable link axes to be addressed throughout the system, the configuration must contain
information about the axis NCUs. There are two types of NCU axis, i.e. local axes and link
axes. The table created by the machine data is used to differentiate between them:
MD10002 $MN_AXCONF_LOGIC_MACHAX_TAB
Note
The axis container functions are described in the subsection "Axis container".
Figure 2-18
Explanation
Logical machine axis image A addresses local machine axes B and link axes C.
The number of local machine axes in B is limited. The maximum permissible number for a
specific system can be found in Catalog NC60.1.
All axes that can address the NCU are contained in B and C together.
Entries in A have the following format:
$MN_AXCONF_LOGIC_MACHAX_TAB[n] = NCj_AXimit
n: Index in Table A
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Several Operator Panels on Several NCUs, Distributed Systems (B3)
Assignment of channel axes to local machine axes and link axes
Link axes
145