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How brake motor function is working in Lexium 32 Servo System.

The break motors are equipped with a holding break. The optional holding brake of a motor is connected to connection CN11 of Servo Drive.
The integrated holding brake controller inside the Servo Drive releases the holding by supplying 24 VDC to brake when the power stage is
enabled. When the power stage is disabled, the holding brake is re-applied by removing the voltage supply to the break.
This holding break need to apply to the motor to keep the motor in standstill condition but not to stop and motor or reduce the motor in case
of running condition.
You can modify the break engage time and break release time by using BRK_AddT_apply and BRK_AddT_release time. 
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