Cause: Positioning control error comes when an excessive positioning deviation has occurred when the servo-lock function was activated. This fault typically occurs when the drive is operating in a closed-loop positioning mode, where it relies on feedback from an encoder (or similar position sensor) to determine the motor's actual position and compare it to a commanded position.

Ero fault in fuji FRENIC MEGA drive indicates Positioning control error. This means a problem with the drive's ability to accurately control the position of the motor.

• Insufficient gain in positioning control system: Readjust the settings of J97 (Servo-lock (Gain)) and d03 (Speed control 1 (Gain)).
• Incorrect control completion width: Check whether the setting of J99 (Servo-lock (Completion width)) is correct.
• Excessive positioning deviation: Check whether the setting of d78 (excessive deviation detection width) is correct.