Fault code51
Overload 2, caused by machine striking something or wrong servo motor wiring or system instability. The manual's first action is: “Review operation pattern. Install limit switches.”
- Model
- MELSERVO MR-J2S- /L50132B
- Display shows
- Overload 2 (51)
- Type
- Fault code
- Source
- Manual p. 108
What 51 means
Overload 2 p. 113
Common causes
- Machine struck something. p. 113
- Wrong connection of servo motor. Servo amplifier's output terminals U, V, W do not match servo motor's input terminals U, V, W. p. 113
- Servo system is unstable and hunting. p. 113
- Encoder faulty. p. 113
What to do
- Review operation pattern. Install limit switches. p. 113
- Connect correctly. p. 113
- Repeat acceleration/deceleration to execute auto tuning. Change auto tuning response setting. Set auto tuning to OFF and make gain adjustment manually. p. 113
- Change the servo motor. p. 113
Before you service the product, read the safety instructions in the manual p. 2.
If 51 is still not resolved
- contact service / dealer p. 2 “Do not attempt to install, operate, maintain or inspect the servo amplifier and servo motor until you have read through this Instruction Manual, Installation guide, Servo motor Instruction Manual and appended documents carefully and can use the equipment correctly.”
- contact service / dealer p. 3 “Any person who is involved in wiring and inspection should be fully competent to do the work.”
This page summarises what the manufacturer’s manual says about 51; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with MELSERVO. Found a mistake? Report an error.