Alarm code A25/A26/A27 refers to<电机动力线UVW过流>.
Causes:
1. Power line problem;
2. Motor problems;
3. Mechanical transmission problems.
Solution:
1. Observe whether the load rate is abnormal through Un003, if there will be a large instantaneous value, the possibility of instantaneous jamming of the mechanical transmission is greater, and it is necessary to further confirm whether the mechanical transmission is smooth and whether there is a collision accident;
2. Check whether the power line between the driver and the motor is damaged, and check whether all connectors and plugs are loose;
3. Judge whether the motor brake can be opened normally, enable it on the JOG by jogging through Fn002, if you can't hear the sound of the brake opening and closing, you need to further judge whether the motor problem or the brake control line problem;
4. Remove the power connection plug on the drive side, and detect the impedance value of UV, UW, VW on the plug, if the impedance value difference is large, it can be determined that there is a problem with the power cable or motor;
5. Check whether the impedance of the three-phase winding is normal on the power socket side of the motor, if the impedance value difference of UV, UW and VW is large, the motor has a problem;
6. If the specific cause cannot be directly investigated, the driver can be replaced, the cable can be connected, and then the driver, motor or cable problem can be analyzed according to the alarm situation.
7. If it is an additional shaft, it is necessary to consider whether the motor capacity selection is too small: if the torque required to calculate the load is close to or greater than the rated torque of the motor used, the motor needs to be re-selected.
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