Cause : MEMOBUS/Modbus Communication Error comes when control data was not received for the CE detection time set to H5-09.

1. Faulty communications wiring or an existing short circuit.

• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.

2. Communication data error occurred due to noise.

• Check the various options available to minimize the effects of noise.
• Counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.