Advanced commissioning
6.11 Motor holding brake
SINAMICS G115D distributed drive
210
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
6.11
Motor holding brake
Overview
The motor holding brake holds the motor in position when it is switched off.
When the "Motor holding brake" function is correctly set, the motor remains switched on as
long as the motor holding brake is open. The converter only switches the motor off when the
motor holding brake is closed.
Function description
After the ON command
1.
With the ON command, the converter switches the motor on.
2.
At the end of the "motor excitation build-up time" (p0346), the converter issues the
command to open the brake.
3.
The converter 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 converter accelerates the motor to the speed setpoint.
After the OFF1 or OFF3 command
1.
The converter brakes the motor down to a standstill using the OFF1 or OFF3 command.
2.
When braking, the converter 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
3.
When the first of the two times (p1227 or p1228) has elapsed, the converter issues the
command to close the brake.
4.
After the "motor holding brake closing time" p1217, the converter switches off the motor.
The motor holding brake must close within the time p1217.
