Speed Setpoint Filter - Siemens SINAMICS S120 Function Manual

Servo control

4.3 Speed setpoint filter

4.3 Speed setpoint filter
Definition
The speed setpoint filters are used to remove or weaken certain frequency ranges. Various
filter types are available.
The speed setpoint filters do not have any effect on the stability of the speed controller,
because they lie in the setpoint channel. The dynamic response in the control behavior is
reduced by the smoothing.
The speed setpoint filters are identical in structure and can be set via parameters
p1415[0...n] (filter 1) and p1421[0...n] (filter 2) as follows:
● Bandstop
● Low-pass 1st order (PT1)
● Low-pass 2nd order (PT2)
Figure 4-2
Activating and parameterizing the speed setpoint filters via the expert list
You can activate 2 speed setpoint filters in the STARTER expert list using parameter
p1414[0...n].
1. Select group parameter p1414[0] and open the sub categorization.
2. Select the required speed setpoint filter - and in the drop-down list of the parameter line,
select setting "[1] Yes".
Repeat this procedure for every speed setpoint filter that you wish to additionally activate.
90
Filter overview for speed setpoint filters
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions