Siemens SINUMERIK 840Di Function Manual page 1812

Detailed Description
2.9 Sum offsets and setup offsets
Note
DL0 is not allowed. If compensation is deselected (D0 and T0), the sum offset also becomes
ineffective.
Programming a sum offset that does not exist triggers an alarm, similar to programming a
D compensation that does not exist.
Thus, only the defined wear remains part of the compensation (defined in system variables
$TC_DP12 to $TC_DP20).
Programming a sum offset when a D compensation is active (also applies to deselection)
has the same effect on the path as programming a D command. An active radius
compensation will, therefore, lose its reference to adjacent blocks.
Configuration
MD18112 $MN_MM_KIND_OF_SUMCORR, bit 4=0: Default setting:
Only one set of sum offsets exists per DL number.
We refer in general to the sum offset.
This describes the data represented by $TC_SCPx.
Fig. 2-49
2-132
MD18112 $MN_MM_KIND_OF_SUMCORR, bit 4 = 0
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Tool Compensation (W1)