Motor Holding Brake - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Advanced commissioning
6.11 Motor holding brake
6.11
Motor holding brake
The motor holding brake holds the motor in position when it is switched off. When correctly
set, the inverter first switches on the motor and then opens the motor holding brake. When the
motor is stationary (zero speed) the inverter closes the motor holding brake, and then switches
off the motor.
Function
Figure 6-20
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.
Function after an OFF1 or OFF3 command:
1. The inverter brakes the motor down to a standstill and switches it off using the OFF1 or
OFF3 command.
2. When braking, the inverter compares the speed setpoint and the actual speed with the
"standstill detection speed threshold" p1226:
– Speed setpoint < p1226: The "standstill detection monitoring time" p1227 starts
– Current speed < p1226: The "pulse cancellation deceleration time" p1228 starts
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Motor holding brake function
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
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