Siemens SINUMERIK 840D sl Function Manual page 365

Entry of compensation table
The size of the compensation table, i.e. the number of interpolation points, must first be
defined in a machine data - a power ON must then be executed.
Compensation tables can be loaded to the backed up NC user memory by two different
methods.
● The compensation values are loaded when an NC program with the compensation tables
● The compensation values can also be loaded by transferring the tables from a PC via the
These compensation values are not lost when the control is switched off because they are
stored in the non-volatile user memory. They can be updated if necessary (e.g. following re-
measuring because of machine aging).
When the setting in machine data:
MD18342 $MN_MM_CEC_MAX_POINTS[t]
(max. number of interpolation points of sag comp., SRAM)
or
MD38000 $MA_MM_ENC_COMP_MAX_POINTS
(number of interpolation points with interpolatory compensation, SRAM) changes,
the non-volatile user memory is automatically re-allocated on system power-on.
All the user data in non-volatile user memory (e.g. drive and HMI machine data, tool offsets,
part programs, compensation tables, etc.) are deleted.
References:
/FB2/ Function Manual Basic Functions/Memory Configuration (S7)
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
is started.
serial interface on the PCU.
Note
Once the size of the compensation tables has been defined in machine data, the NC
generates the tables after the next power ON. The default setting for these tables is "0".
The compensation tables can be output from the "Services" operating area via the serial
interface on the PCU and loaded back after editing.
CAUTION
Compensations (K3)
Interpolatory compensation
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