Efficient Networks Siemens Sinamics S120 - Manual (Page 121)

Vector control
4.4 Speed controller adaptation
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
121
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".