Speed Controller; Speed Setpoint Filter - Siemens SINAMICS S120 Function Manual

Servo control

3.1 Speed controller

3.1 Speed controller
The speed controller controls the motor speed using the actual values from the encoder
(operation with encoder) or the calculated actual speed value from the electric motor model
(operation without encoder).
Properties
● Speed setpoint filter
● Speed controller adaptation
Note
Speed and torque cannot be controlled simultaneously. If speed control is activated, this
has priority over torque control.
Limits
The maximum speed p1082[D] is defined with default values for the selected motor and
becomes active during commissioning. The ramp function generators refer to this value.
Figure 3-1
3.2

Speed setpoint filter

The two speed setpoint filters are identical in structure and can be used as follows:
● Bandstop
● Low-pass 1st order (PT1) or
● Low-pass 2nd order (PT2)
Both filters are activated via parameter p1414.x. Parameters p1415 and p1421 are used to
select the filter elements.
68
Speed controller limitations
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions