ILLEGAL POWER LINE

What does SP9055 mean?

This Fanuc Series 0i-D/0i Mate-D spindle alarm indicates that the power line state signal of the magnetic contactor for selecting a spindle or output is abnormal. This suggests a problem with the contactor or its control logic.

• Faulty or worn magnetic contactor (MC) for spindle selection or output.
• Incorrect PMC sequence program controlling the magnetic contactor.
• Wiring error or loose connection to the magnetic contactor's coil or auxiliary contacts.
• Failure of the auxiliary contacts providing feedback to the control system.

Click steps to track your progress.

1. 1

   Inspect the magnetic contactor (MC) responsible for selecting the spindle or output power line; check for wear, pitting, or mechanical issues.

2. 2

   Verify the auxiliary contacts of the magnetic contactor that provide feedback to the control system are operating correctly.

3. 3

   Check the wiring connections to and from the magnetic contactor for looseness, damage, or incorrect termination.

4. 4

   Review the PMC sequence program that controls the magnetic contactor to ensure its logic is correct and matches the machine's operation.

5. 5

   Test the magnetic contactor's operation manually (if safe) to observe its switching and feedback signals.