Siemens SINAMICS S120 Function Manual page 122

Vector control
4.4 Speed controller adaptation
Figure 4-5 Kp_n-/Tn_n adaptation
Dynamic response reduction in the field-weakening range can be activated (p1400.0) with
sensorless operation. This is activated when the speed controller is optimized in order to
achieve a greater dynamic response in the basic speed range.
Example of speed-dependent adaptation
Note
This type of adaptation is only active in "operation with encoder" mode.
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions