Communication Error1

What does dCE1 mean?

This fault indicates a temporary hardware problem in the drive's communication circuit, most likely caused by electrical noise. This can disrupt control signals and data exchange, leading to unstable operation or unexpected shutdowns. Persistent noise can cause further hardware degradation.

• Excessive electromagnetic interference (EMI) from unshielded power cables or motor cables running parallel to communication cables.
• Inadequate grounding of the drive system or communication cable shields (e.g., at drive chassis).
• Incorrect termination resistors (e.g., 120 Ohm for RS-485) on the communication bus.
• Loose or corroded connections at the drive's communication port (e.g., RJ45, screw terminals).
• Internal communication circuit component degradation (e.g., transceivers) due to voltage spikes.

Click steps to track your progress.

1. 1

   1. Inspect all communication cable connections (e.g., RS-485 terminals TB1:1, TB1:2) for looseness or corrosion.

2. 2

   2. Verify communication cable shielding is properly terminated at both ends to earth ground (e.g., at drive chassis).

3. 3

   3. Measure the resistance across communication bus terminals (e.g., A and B for RS-485) with power off to check termination resistors (should be ~60 Ohms if terminated at both ends).

4. 4

   4. Reroute communication cables to maintain minimum 300mm (12 inches) separation from power and motor cables.

5. 5

   5. Check the communication network parameters (e.g., address, baud rate F6-xx) in the drive and compare to controller settings.

6. 6

   6. Ensure the main power supply (L1, L2, L3) to the drive is stable and within specified voltage tolerances.