Overbraking

What does ObF mean?

Indicates an overbraking condition. This occurs when the motor is regenerating too much energy back into the drive, exceeding the drive's ability to dissipate it, often due to rapid deceleration or an overhauling load. This can cause the DC bus voltage to rise excessively, potentially damaging the drive.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for external mechanical forces on the motor that might be causing regeneration (e.g., gravity on a descending load).

2. 4

   Reduce the maximum braking torque limit if configured in the drive settings.