Blocking Protection - Siemens SINAMICS G120 Operating Instructions Manual

Low voltage inverters built-in units with cu250s-2 control units and encoder evaluation

Hide thumbs Also See for SINAMICS G120:

Table of Contents

Blocking protection

In applications with extruders or mixers, the motor can block for an excessive mechanical load.

For a blocked motor, the motor current corresponds to the set current limit without the speed

reaching the specified setpoint.

If the speed lies below the speed threshold p2175 for the time p2177 while the motor current

reaches the current limit, the inverter signals "Motor blocked" and fault F07900.

Converter with the CU250S-2 Control Units

Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG

Actual speed value [rpm]

[0] = Unsmoothed

[1] = Smoothed with p0045

Motor blocked speed threshold (factory setting: 120 rpm)

p2175 = 0: Blocking protection deactivated

Motor blocked delay time (factory setting: 3 s)

Status word monitoring 2

r2198.06 = 1: Motor blocked

Advanced commissioning

6.28 Monitoring the driven load