FANUC SP9027 DISCONNECT POSITION CODER

Amplifier alarm number: 27

Replace the cable

FANUC SP9027 Description

The FANUC SP9027 DISCONNECT POSITION CODER alarm usually indicates that the spindle position encoder signal is abnormal, which may be caused by connection problems, hardware failure or incorrect parameter settings. Here are some solution steps and preventive measures:

### Solution steps

1. **Check the encoder plug and cable**: Make sure the encoder plug is not loose or damaged, and the cable is not broken or worn.

2. **Adjust parameter settings**: According to the recommendations, adjust the values ​​of parameters 1320 and 1321 to the maximum and restart the machine tool.

3. **Check the encoder power supply voltage**: If the above steps do not solve the problem, check whether the encoder voltage is normal (greater than 4.75V).

4. **Replace the encoder or motor**: If the encoder power supply voltage is normal but the problem persists, the encoder or motor may need to be replaced.

### Preventive measures

– Regularly check the encoder plug and cable connections to ensure that they are not loose or damaged.

– Follow FANUC’s maintenance guidelines to regularly check and maintain the encoder and related hardware.

– After replacing the encoder or motor, ensure that the correct parameters are set according to FANUC’s parameter setting guidelines.

By following the above steps, you should be able to resolve the FANUC SP9027 DISCONNECT POSITION CODER alarm issue. If the issue persists, it is recommended to contact FANUC technical support for further assistance.