Siemens SINAMICS G120 CU240B-2 Operating Instructions Manual page 199

The motor brake is controlled as shown in the following diagram:
1. After the ON command (switch on motor), the motor is magnetized. At the end of the
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 speed setpoint and the current speed fall below threshold P1226, the monitoring
6. As soon as the first of the two monitoring times (P1227 or P1228) has elapsed, the
7. At the end of the brake closing time P1217, the motor is switched off.
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
magnetizing time (P0346) the inverter issues the command to open the brake.
motor holding brake must open within this time.
time P1227 or P1228 is started.
inverter issues the command to close the brake. The motor comes to a standstill but
remains switched on.
The motor holding brake must close within this time.
Functions
7.9 Technological functions
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