Siemens SINUMERIK 802D sl Function Manual page 217

Monitoring
To avoid excessive velocities and acceleration rates on the machine axis as a result of
applying sag compensation, the total compensation value is monitored and limited to a
maximum value.
The maximum compensation value is set for each axis with the following axial machine data:
MD32720 CEC_MAX_SUM
(maximum compensation value for sag compensation).
If the resulting total compensation value is greater than the maximum value, alarm 20124
"Sum of compensation values too high" is output. Program processing is not interrupted. The
compensation value output as an additional setpoint is limited to the maximum value.
Alteration of the total compensation value is also limited axially.
When the limit value defined by the following machine data is violated, alarm 20125 "Too
rapid change in compensation value" is generated:
MD32730 CEC_MAX_VELO (change in velocity with 1)
The program continues to run. The path not covered because of the limitation is made up as
soon as the compensation value is no longer subject to limitation.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Compensation (K3)
11.3 Interpolatory compensation
217