Err-1 of GSK AC Servo Driver Meaning: Motor velocity exceeds t he setting value (Refer to the PA54 top velocity limit) Possible Cause 1: Encoder feedback signal abnormality Solution: Inspect t he motor encoder or its signal connection or PA1 setting error Possible cause 2: In the velocity mode, acceleration/deceleration time constant setting is excessive small, so that the velocity overshoot value i s excessive big. Solution: Enlarge the acceleration time PA57 and the deceleration time PA58 Possible cause 3: PA54 (top velocity limit) setting value excessive small. Solution: Correctly set the PA54 value based upon the motor’s nameplate. Possible Cause 4: Excessive big position command electric gear ratio Solution: Correctly set the electric gear ratio Above also can apply to other GSK AC Servo Drive models |