KEB COMBIVERT F5 Reference Manual page 180

LL - Tune Parameters
LL16
Overspeed Test Speed
LL17
Safety Release
LL18
NTSD Tune Mode
180
Maximum speed used during Overspeed Test in LL15. A non-zero value
must be entered to perform the test correctly.
The Safety Release function turns off the acceleration jerk rates and raises
the maximum torque limit to 300% of LM07 Motor Torque for one run in
order to drive an elevator car off the safeties.
The NTSD Tune Mode can be used to automatically determine and set the
NTSD slowdown points.
When activated, run the elevator to either terminal floor. The motor speed
when the NTSD switches are passed and the NTSD inputs are dropped
will be learned during the run and displayed after the end of the run. There
will also be the option to automatically set the TS03 - 08 Speed Thresholds
for the corresponding NTSD input thresholds and direction of travel from
the learn run. If values are automatically set from the learn run, the value
entered will be 10% above the speed at which the input was dropped. After
the learn run has been completed, the drive will return to normal operation.