Setpoint Calculation; Overview - Siemens SINAMICS G120 Operating Instructions Manual

6.19

Setpoint calculation

6.19.1

Overview

Overview
Setpoint processing influences the setpoint using the following functions:
● "Invert" inverts the motor direction of rotation.
● The "Inhibit direction of rotation" function prevents the motor from rotating in the incorrect
direction; this function can make sense for conveyor belts, extruders, pumps and fans, for
example.
● The "Skip frequency bands" prevent the motor from being continuously operated within
these skip bands. This function avoids mechanical resonance effects by only permitting the
motor to operate briefly at specific speeds.
● The "Speed limitation" function protects the motor and the driven load against excessively
high speeds.
● The "Ramp-function generator" function prevents the setpoint from suddenly changing. As
a consequence, the motor accelerates and brakes with a reduced torque.
Figure 6-42
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Setpoint processing in the inverter
Advanced commissioning
6.19 Setpoint calculation
273