Siemens SINUMERIK 840D sl Function Manual page 377

Compensation interpolation points
The number of required interpolation points in the compensation table must be defined for
every compensation relationship and the requisite memory space reserved with the following
general machine data:
MD18342 $MN_MM_CEC_MAX_POINTS (size of FFS)
MD18342 $MN_MM_CEC_MAX_POINTS[t]
with:
[t] = Index of compensation table
with:
(0 ≤ t < 2 * maximum number of axes)
i.e.
t = 0: 1st compensation table t = 1: 2nd compensation table etc.
Table parameters
The position-related corrections for the relevant compensation relationship are stored as
system variables in the compensation table.
The following parameters must be set for the table:
● Compensation value for interpolation point N of compensation table [t]
● Base axis ($AN_CEC_INPUT_AXIS[t])
● Compensation axis ($AN_CEC_OUTPUT_AXIS[t])
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
($AN_CEC [t, N])
The compensation value of the compensation axis must be entered in the table for each
individual interpolation point (position of the base axis).
Interpolation point N is limited by the number of possible interpolation points in the
relevant compensation table:
MD18342 $MN_MM_CEC_MAX_POINTS.
Permissible range of N: 0 ≤ N < MD18342
Name of machine axis whose setpoint is to be used as the input for the compensation
table [t].
Name of machine axis to which the output of the compensation table [t] is to be applied.
Note
In multi-channel systems the "general axis identifiers" AX1... must be preset, if the
identifiers of machine axis and channel axis are identical.
Compensations (K3)
Interpolatory compensation
377