Cause : Brake does not open comes when the brake has not opened, the output current of the converter has exceeded the parameterized current threshold for longer than one second (with the rotor locked).

F057 fault in siemens master drive indicates a problem with the brake that's connected to the motor. This fault message signifies the drive detected an issue that could prevent the brake from functioning properly.

1. Check brake Check I(max) brake (U840).
2. The set threshold must be at least 10% above the maximum possible acceleration current.