Siemens SINUMERIK 840D sl Function Manual page 290

K3: Compensations
5.4 Interpolatory compensation
Nxx4 $AN_CEC_OUTPUT_AXIS[0] = "AX2"
See section "Configuration examples", configuration 1, below.
Note
The NCU number is to be written before the axis name. A sag compensation between
NC1_AX1 and NC1_AX2 is not possible.
Axis container
The sag compensation can also be used in conjunction with axes, which are components of
a axis container (Page 104). It must be ensured that the coupling is between two axes from
the LAI layer, so that other machine axes can be coupled after each axis container rotation.
In order to maintain the coupling between two specific machine axes, even after an axis
container rotation, the compensation table has to be rewritten after each rotation.
Requirement
The axis container has to be located in the start position ($AN_AXCTAS == 0) when the sag
compensation is activated.
NOTICE
Changing the machine axes
After a axis container rotation, the same channel axes remain coupled. The coupled machine
axes can change.
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions