Siemens CU240B-2 - Motor Holding Brake

Advanced commissioning
6.7 Application-specific functions
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
293
6.7.4
Motor holding brake
The motor holding brake holds the motor in position when it is switched off. If the setting is
correct, the motor will produce an electrical holding torque before the inverter opens the
brake. The inverter does not close the motor holding brake until the motor is at a standstill.
Function
Image 6-47 Motor holding brake function
Function after an ON command:
1. With the ON command, the inverter switches the motor on.
2. At the end of the "motor excitation build-up time" (p0346), the inverter issues the
command to open the brake.
3. The inverter keeps the motor at a standstill until the "motor holding brake opening time"
p1216 has ended.
The motor holding brake must be opened within time p1216.
4. The inverter accelerates the motor to the speed setpoint.