Siemens SINAMICS G120 Operating Instructions Manual page 289

Activating M1 ... M3 uncontrolled motors
Figure 6-36
Procedure for connecting an uncontrolled motor:
1. The speed-controlled motor turns with maximum speed p1082.
2. The control deviation of the technology controller is greater than p2373.
3. Time p2374 has expired.
The inverter brakes the speed-controlled motor with ramp-down time p1121 to the
activation/deactivation speed p2378. Until the activation/deactivation speed p2378 is
attained, the inverter deactivates the technology controller temporarily.
4. After switch-on delay p2384, the inverter connects an uncontrolled motor.
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
Conditions for connecting a motor
Advanced commissioning
6.21 Cascade control
289