Speed Controller Adaptation - Siemens SINAMICS S120 Function Manual

Note
In comparison with speed control with an encoder, the dynamic response of drives without
an encoder is significantly reduced. The actual speed is derived by means of a model
calculation from the converter output variables for current and voltage that have a
corresponding interference level. To this end, the actual speed must be adjusted by means
of filter algorithms in the software.
Function diagrams (see SINAMICS S List Manual)
● 6040 Speed controller with/without encoder
Overview of key parameters (see SINAMICS S List Manual)
● p0340[0...n] Automatic calculation of control parameters
● p1442[0...n] Speed actual value smoothing time
● p1452[0...n] Speed actual value smoothing time (SLVC)
● p1460[0...n] Speed controller P gain lower adaptation speed
● p1462[0...n] Speed controller integral time lower adaptation speed
● p1470[0...n] Speed controller sensorless operation P gain
● p1472[0...n] Speed controller sensorless operation integral time
● p1960 Speed controller optimization selection
● r0062 CO: Speed setpoint after the filter
● r0063[0...1] CO: Speed actual value
● r0345[0...n] Nominal motor starting time
● r1482 CO: Speed controller I torque output
● r1508 CO: Torque setpoint before supplementary torque
4.4

Speed controller adaptation

Description
Two adaptation methods are available, namely free Kp_n adaptation and speed-dependent
Kp_n/Tn_n adaptation.
Free Kp_n adaptation can also also be activated in "operation without encoder" mode and is
used in "operation with encoder" mode as an additional factor for speed-dependent Kp_n
adaptation.
The speed-dependent Kp_n/Tn_n-adaptation is only active during "operation with encoder".
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Vector control
4.4 Speed controller adaptation
121