Mitsubishi servo driver alarm codes and solutions

     Mitsubishi servo drivers may stop working due to various reasons such as improper operation or equipment failure during daily use. At this point, the cause of the fault should be confirmed according to the Mitsubishi servo driver alarm code before resolving it. Below we will analyze several common Mitsubishi servo driver alarm codes and solutions!

 A.Mitsubishi servo driver alarm code : AL31.1

 Fault analysis: It is a motor overspeed alarm.

 Reason analysis:

1. Input command pulse frequency is too high;

2. Excessive overshoot caused by too small acceleration and deceleration time;

3. Mitsubishi servo system is unstable;

4. The electronic gear ratio is too large;

5. Mitsubishi servo encoder malfunction;

 Corresponding processing methods:

1. Set the correct pulse frequency;

2. Increase the time constant of addition and subtraction;

3. Reset the gain;

4. Set the correct electronic gear ratio;

5. Replace Mitsubishi servo encoder or Mitsubishi servo motor;

 B.Mitsubishi servo driver alarm code ALE6.1

 Fault analysis: Mitsubishi servo motor emergency stop

 Cause analysis: The line between Mitsubishi servo driver EMG and SG is disconnected

 Corresponding handling method: Just short circuit the EMG

 C.Mitsubishi servo driver alarm code AL52

 Fault analysis: The stuck pulse in the deviation counter exceeds the resolution capability of Mitsubishi servo encoder multiplied by 10

 Reason analysis:

1. The setting of the acceleration and deceleration time constant is unreasonable;

2. The torque limit value is too small;

3. Due to a decrease in power supply voltage, the motor torque is insufficient and the servo motor cannot start;

4. Position loop gain 1 is too small;

5. Due to external force, the servo motor shaft rotates;

6. Mechanical failure;

7. Encoder malfunction.

  Corresponding processing method:

1. Set the correct acceleration and deceleration time constant (refer to the Mitsubishi servo motor user manual);

2. Increase the torque limit value;

3. Replace the Mitsubishi servo motor with a higher power;

4. Adjust the set value to the range where the Mitsubishi servo system can operate normally;

5. Increase torque limit value, reduce load, or choose Mitsubishi servo motor with larger output

6. Install the limit switch after checking the operating mode

7. Replace Mitsubishi servo encoder or Mitsubishi servo motor

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