1. Using Mitsubishi AC servo system mainly consists of three series: baiMR-ES, MR-J2S, MR-J3.
2. The usual fault conditions can be preliminarily judged by the code displayed on the servo drive. The following are several common faults and their troubleshooting methods:
1. AL.E6- means 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 CN1 port EMG and SG are not connected.
2. AL.37-parameter is abnormal. The internal parameters are disordered, the operator sets the parameters incorrectly or the drive is caused by external interference. It can be solved by restoring the general parameters to factory values.
3. AL.16-Encoder failure. The internal parameters are disordered or the encoder line is faulty or the motor encoder is faulty. Restore the parameters to the factory value or replace the cable or replace the motor encoder. If the fault persists, the drive backplane is damaged.
4. AL.20-Encoder failure. Caused by motor encoder failure or cable disconnection, loose connectors, etc. Replace the encoder cable or servo motor encoder. When this fault occurs in the MR-J3 series, there is another possibility that the ground wire of the drive CPU is broken.
5. AL.30-Regenerative braking is abnormal. If an alarm occurs just after the power is turned on, the internal brake circuit components of the drive are damaged. If it occurs during operation, check the wiring of the brake circuit and equip an external brake resistor if necessary.
6. AL.50, AL.51-overload. Check whether the output U, V, W three-phase phase sequence wiring is correct, the three-phase coil of the servo motor is burned out or grounding fault. Monitor whether the load rate of the servo motor exceeds 100% for a long time, the servo response parameter is set too high, and resonance occurs.
7. AL.E9-The main circuit is disconnected. Check whether the main circuit power supply is connected. If it is normal, the main module detects the circuit failure, and the driver or accessories must be replaced.
8. AL.52-The error is too large. Motor encoder failure or drive output module circuit component damage, usually more oily use occasions, this failure is more common.
3. Another simple method for judging the fault of the servo motor: After removing all the wiring of the motor, rotate the motor bearing. If you can feel the obvious resistance and the rotation is not smooth, the fuselage coil will burn out. In addition, it is easy to damage the coupling when the coupling is improperly assembled. If the encoder is broken, you can shake the encoder part of the motor. If you can hear the sound of the encoder fragments, the encoder is broken.
4. Attach all codes of Mitsubishi servo MR-J2S series
Servo alarm code 1:
Undervoltage
One by one AL10
Memory exception
One by one AL12
Clock abnormal
-One AL13
Memory exception 2
-One AL15
Encoder abnormal 1
-One AL16
-One AL17
Circuit abnormality 2 Memory abnormality 3
-One AL19
-One AL1A
Abnormal motor coordination
One one AL20
Encoder abnormal 2 motor ground fault
-One AL24
-One AL 25
Absolute position is lost
-One AL 30
Regenerative braking abnormal
-One AL 31
Speeding
Servo alarm code 2:
——AL32
Overcurrent
——AL33
Overpressure
——AL35
Command pulse frequency is abnormal
-One AL
37
Parameter abnormal
-One AL
45
The main circuit device is overheated
-One AL
46
Motor overheated
—AL
50
Overload 1
——AL
51
Overload 2
——AL
52
The error is too large
-One AL
8A
Serial communication timeout
-One AL
8E
Serial communication is abnormal
