The fault code FU208 on a Sinic Electric servo drive indicates an FPGA system sampling operation timeout. The main causes and solutions for this issue are as follows:

1. MCU Communication Timeout (Internal error code: P0B-45=1208)

• Cause: Damaged internal chip.

• Solution: Replace the servo drive.

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  2. Encoder Communication Timeout (Internal error code: P0B-45=2208)

• Causes:

  a. Incorrect encoder wiring.

  b. Loose encoder cable connections.

  c. Excessive encoder cable length.

  d. Encoder signal interference.

  e. Faulty encoder.

• Solutions:

a. Recheck and correct encoder wiring.

b. Secure cable connections.

c. Shorten cable length or use shielded cables.

d. Eliminate sources of interference.

e. Replace the encoder if necessary.




• 3. Current Sampling Timeout (Internal error code: P0B-45=3208)

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• Causes:

a. Interference from large nearby equipment or multiple power converters/frequency drives in the cabinet.

b. Damaged internal current sampling chip.

• Solutions:
  

a. Separate high-power and low-power wiring (avoid bundling them together).

b. Eliminate or shield interference sources.

c. Replace the servo drive if the chip is damaged.




• 4. High-Precision AD Conversion Timeout (Internal error code: P0B-45=4208)




• Cause:

Interference in high-precision AI channel wiring.

Solutions:

a. Refer to the correct wiring diagram to verify AI channel connections.

b. Use twisted-pair shielded cables and shorten the wiring length.




• 5. FPGA Operation Timeout (Internal error code: P0B-45=0208)

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• Cause: Related to issues described in Causes 1/2/3/4.

• Solution: Troubleshoot and resolve based on the methods outlined for Causes 1/2/3/4.

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Note: Always follow the manufacturer’s guidelines and safety protocols during troubleshooting.