Code bUS (Fault): Option Communication Error

Code type: Fault Manual section: Yaskawa V1000 Troubleshooting No signal received from the PLC. - Check for faulty wiring. - Correct the wiring. - Check for loose wiring and short circuits. Repair as needed. The communication cable is faulty or a short circuit exists. A communications data error occurred due to noise. - Check the various options available to minimize the effects of noise. - Counteract noise in control circuit, main circuit, and ground wiring. - Ensure that other equipment such as switches or relays do not cause noise and use surge suppressors if required. - Use cables recommended by Yaskawa or another type of shielded line. Ground the shield on the controller side or on the drive input power side. - Separate all wiring for communications devices from drive input power lines. Install an EMC noise filter to the input side of the drive input power. The option card is damaged. - Replace the option card if there are no problems with the wiring and the error continues to occur. The option card is not properly connected to the drive. - The connector pins on the option card are not properly lined up with the connector pins on the drive. - Reinstall the option card.