Overvoltage during DC-injection braking

What does OU mean?

An overvoltage (OU) TRIP occurs if, during DC-injection braking (GSB) at high motor speeds, the residual voltage from magnetism and high speed generates an excessive motor current. This can lead to overvoltage due to the drive's attempt to reduce magnetization when the pulse inhibit (DCTRL-IMP) is too short.