Siemens SINAMICS G120 Operating Instructions Manual page 219

Principle of operation after OFF1 and OFF3 command
Figure 8-17
The motor brake is controlled as shown in the following diagram:
1. After the ON command (switch on motor), the inverter magnetizes the motor. At the end
2. The motor remains at a standstill until the end of the brake opening time p1216. The
3. At the end of the brake opening time the motor accelerates to its speed setpoint.
4. After the OFF command (OFF1 or OFF3) the motor brakes to a standstill.
5. If the actual speed is less than 20 rpm, then the inverter issues the command to close the
6. At the end of the brake closing time p1217, the motor is switched off.
SINAMICS G120C Inverter
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
Controlling the motor holding brake when the motor is switched on and off
of the magnetizing time (p0346), the inverter issues the command to open the brake.
motor holding brake must open within this time.
brake. The motor comes to a standstill but remains switched on.
The motor holding brake must close within this time.
8.9 Application-specific functions
Functions
217