Siemens SINUMERIK 840D sl Function Manual page 291

Configuration examples
The following pictures show the axis configuration of an NCU link with two NCUs:
● Configuration 1
The two channels of NCU 1 are shows in configuration 1. Here, the channel axis names
that are defined via the machine data $MC_AXCONF_CHANAX_NAME_TAB are entered.
The configuration of NCU 2 is not shown in more detail.
All the axes interpolated by NCU 1 are compiled in the "Logical machine axis image" (LAI).
The assignment between channel axes takes place via $MC_AXCONF_MACHAX_USED.
The assignment between the "Logical machine axis image" and the real axes is undertaken
via $MN_AXCONF_LOGICMACHAX_TAB. If ones pursues the connecting line that starts
with channel axis ZZ, one ends at Axis AX-2 on NCU 2, i.e. to traverse the 2nd axis of NCU
2, the following command must be programmed in the 2nd channel of NCU 1: N2040
POS[ZZ]=10 FA[ZZ]=1000
● Configuration 2
Configuration 2 contains an axis container (CT1). The parameterization is set via
$MN_AXCT_AXCONF_ASSIGN_TAB1. The axis container is a multi-NCU object that only
exists once for all NCUs.
For NCU 1, the channel axes YR and YY are participants in the axis container. The channel
axes of NCU2 are not shown. The axis container contains the axes NC1_AX5, NC1_AX6,
NC2_AX1 and NC2_AX2. Axis container YR connects with NC2_AX1 and YY connects with
NC2_AX2 during the ramp up. In configuration 2, fig. 2, the axis container is rotated such
that YR is connected to NC2_AX2 and YY to NC1_AX5.
Configuration 1: NCU link with rigid coupling
①
②
③
Figure 5-10
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
MD20070 $MC_AXCONF_MACHAX_USED[0 ... 2]
MD10002 $MN_AXCONF_LOGIC_MACHAX_TAB
MD10000 $MN_AXCONF_MACHAX_NAME_TAB
Configuration 1: NCU link with rigid coupling
K3: Compensations
5.4 Interpolatory compensation
291