Speed Limiting - Siemens SINAMICS S120 Function Manual

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Speed limiting

Function description

In the range from 0 rpm to the speed setpoint, a drive train (e.g. motor, clutch, shaft, machine)

can have one or more points of resonance. These resonances lead to oscillations. The

suppression bandwidths can be used to prevent operation in the resonant frequency range.

The limit frequencies can be set via p1080[D] and p1082[D]. Further, using connectors

p1085[C] and p1088[C] it is possible to influence these limits in operation.

Minimum speed

Using parameter p1106[0...n], a minimum speed n_min s_src or minimum velocity can be set,

which is wired via BICO.

Function diagrams (see SINAMICS S120/S150 List Manual)

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Skip frequency bands, setpoint limitation, minimum speed

Setpoint channel overview

Setpoint channel - Skip frequency bands and speed limiting

Extended setpoint channel

4.4 Speed limiting