Repair AB servo power supply? Call the police AL 16? When doing maintenance, we can't limit our thinking too much. Different brands of maintenance are related, so we sorted out the fault code maintenance of Mitsubishi servo, hoping to make inferences about maintenance failures. 2094-BM0 1-S servo legend: Mitsubishi AC servo system is mainly composed of three series: MR-ES, MR-J2S and MR-J3. Usually, the fault situation can be preliminarily judged by the code displayed on the servo driver. The following are some common faults and their solutions: 1, al. E6- stands for servo emergency stop. There are generally two reasons for this failure, one is that the 24V power supply of the control loop is not connected, and the other is that the EMG and SG of CN 1 port are not connected. 2.AL.37- abnormal parameters. Internal parameters are disordered, the parameters set by the operator are incorrect or the driver is disturbed by external factors. General parameters can be solved by restoring to factory values. 3.AL. 16- encoder failure. Internal parameter disorder or encoder circuit failure or motor encoder failure. Restore the parameters to the factory values, or replace the cable or motor encoder. If the fault persists, the drive backplane is damaged. 4.AL.20- encoder failure. Motor encoder failure or cable disconnection, loose connector, etc. Replace the encoder wire or servo motor encoder. When this fault occurs in Mr-J3 series, there is another possibility that the ground wire of the driving CPU is burnt out. 5.AL.30- Abnormal regenerative braking. If an alarm appears immediately after power-on, the brake circuit elements inside the driver are damaged. If it appears during operation, check the wiring of the brake circuit and prepare a dynamic resistor if necessary. 6.AL.50 and AL.5 1- overload. Check whether the three-phase sequence wiring of output U, V and W is correct, and whether the three-phase coil of servo motor is burnt out or grounded. Monitor whether the load rate of servo motor exceeds 100% for a long time, and the servo response parameters are set too high, resulting in * * * vibration. 7.al. E9- The main circuit is disconnected. Check whether the main loop power supply is connected. If it is normal, the main module will detect a loop fault and must replace the drive or accessories. 8.AL.52- The error is too large. Motor encoder failure or driver output module circuit component damage is usually more common in the use of more oil pollution. In addition, a simple way to judge the fault of the servo motor is to rotate the motor bearing after removing all the wiring of the motor. If you can feel the obvious resistance and the rotation is not smooth, the fuselage coil will burn out. In addition, when the coupling is improperly assembled, it is easy to bump out of the encoder. You can shake the encoder part of the motor. If you can hear the sound of encoder fragments, the encoder will be knocked out. Attached are all codes of Mitsubishi servo MR-J2S series servo alarms: —— AL 10? Al 12-Al 13 undervoltage-abnormal memory? Abnormal clock -Al 15? Memory exception 2-Al 16? Encoder exception1-al17? Circuit abnormality 2-Al 19? Memory exception 3-Al 1A? Abnormal motor coordination -Al? 20 ? Encoder exception 2-Al? 24 ? Motor grounding fault -Al? 25 Absolute position lost -Al? 30 regenerative braking is not normal -Al? 3 1 overspeed -Al? 32 overcurrent -Al? 33 overvoltage -Al? 35 command pulse frequency abnormal Al 37 parameter abnormal Al 45 main circuit device overheating Al 46 motor overheating Al 50 overload 1-Al 5 1 overload 2-Al 52 error excessive Al 8A serial communication timeout Al 8e serial communication servo abnormal alarm code: -Al 92? Battery disconnect warning -al 96? Error warning of origin setting -Al 9f? Battery warning -ALE0 regenerative braking current is too large warning -ALE 1 overload warning -ALE3? Absolute position counter warning -ALE5? ABS timeout warning -ale6? Servo motor stopped abnormally -ALE9? Main circuit shutdown warning -alea? ABS servo on warning