Siemens SINAMICS G220 - Page 609

The converter controls the motor holding brake as follows:
• After the ON command:
– After the ON command, the converter switches on the motor.
– At the end of the "motor excitation build-up time" p0346, the converter issues the
command to open the brake.
– The converter holds the motor at a standstill until the "Motor holding brake opening time"
p1216 has ended.
The motor holding brake must have opened within time p1216.
– The converter accelerates the motor to the speed setpoint.
• After the OFF1 or OFF3 command:
– After the OFF1 or OFF3 command, the converter brakes the motor to a standstill.
– During braking, the converter compares the speed setpoint and the actual speed with the
"Threshold for zero speed detection" p1226:
Speed setpoint < p1226: The "Zero speed detection monitoring time" p1227 starts.
Actual speed < p1226: The "Pulse cancellation delay time" p1228 starts.
– When the 󹪝rst of the two times p1227 or p1228 has elapsed, the converter issues the
command to close the brake.
– After the "Motor holding brake closing time" p1217, the converter switches o󹪜 the motor.
The motor holding brake must have closed within the time p1217.
• After the OFF2 command
After the OFF2 command, the brake closing time is not taken into account.
The converter issues the command to close the motor holding brake immediately and
irrespective of the motor speed.
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Figure14-194 Control of the motor holding brake after OFF2
Functions
14.11Drive functions
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 607