Siemens SINAMICS G120X Operating Instructions Manual page 345

Infrastructure converter for hvac/water/wastewater

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Table of Contents

Further information is provided in the parameter list.

Incorrect direction of motor rotation if the parameterization is not suitable

If you are using an analog input as speed setpoint source, then for a setpoint = 0 V, noise

voltages can be superimposed on the analog input signal. After the on command, the motor

accelerates up to the minimum frequency in the direction of the random polarity of the noise

voltage. A motor rotating in the wrong direction can cause significant material damage to the

machine or system.

● Inhibit the motor direction of rotation that is not permissible.

SINAMICS G120X converter

Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC

Minimum speed

CI: Speed limit of ramp-function generator, positive direction

CI: Speed limit of ramp-function generator, negative direction

Minimum speed

CO: Speed limit in positive direction of rotation

CO: Speed limit positive active

CI: Speed limit in positive direction of rotation

Skip speed 1

Skip speed 2

Skip speed 3

Skip speed 4

CI: Skip speed scaling

CO/BO: Skip frequency band of status word

CI: Minimum speed signal source

CO: Speed setpoint according to minimum limit

CO: Setpoint after direction limiting

CO: Ramp-function generator setpoint at the input

CO: Speed controller setpoint sum

Parameters (Page 467)

Advanced commissioning

6.5 Setpoints and setpoint processing

Factory setting