Communication Error

What does CE mean?

This fault occurs due to electrical interference causing communication data errors within the control circuit, impacting reliable drive control. The drive detects this error if it fails to receive control data correctly within the detection time set by H5-09. Unresolved communication errors can lead to unpredictable drive behavior and system instability.

• Excessive electromagnetic interference (EMI) or radio frequency interference (RFI) on the communication cable.
• Incorrect or missing termination resistors on the communication bus (e.g., RS-485, CANbus).
• Loose, damaged, or improperly shielded communication cable connections at the drive or master controller.
• Mismatched communication protocol parameters (e.g., baud rate, parity, P5-01) between drive and master.
• Failure of the master controller to send poll requests or transmit data within the timeout period.

Click steps to track your progress.

1. 1

   Inspect communication cable shielding for continuity and ensure proper grounding at one end.

2. 2

   Verify communication parameters (e.g., P5-01 to P5-07) match the master controller settings precisely.

3. 3

   Check for proper termination resistors (e.g., 120 Ohm for RS-485) at both ends of the communication bus.

4. 4

   Route communication cables separately from high-voltage power cables or noisy inductive loads.

5. 5

   Use a communication analyzer or oscilloscope to monitor bus signals for noise or dropped packets.