Setpoint Calculation; Overview Of Setpoint Preparation - Siemens SINAMICS G120D Original Instructions Manual

Setting functions

8.4 Setpoint calculation

8.4 Setpoint calculation
8.4.1

Overview of setpoint preparation

You only have to set the setpoint processing if you operate the converter without basic
positioner, i.e. you only operate it in the speed-controlled mode.
The setpoint can be modified as follows using the setpoint processing:
● Invert setpoint to reverse the motor direction of rotation (reversing).
● Inhibit positive or negative direction of rotation, e.g. for conveyor belts, pumps or fans.
● Skip frequency bands to prevent mechanical resonance effects.
The skip frequency band at speed = 0 results in a minimum speed after switching on the
motor.
● Limit to a maximum speed to protect the motor and mechanical system.
● Ramp-function generator to accelerate and brake the motor with an optimum torque.
Figure 8-12
126
Setpoint processing in the converter
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA