MEMOBUS/Modbus Communication Error

What does CE mean?

This minor fault indicates that control data was not received correctly for two seconds, primarily due to noise interference or incompatible communication settings. Noise can corrupt data transmission, while incorrect protocol settings or a too-short CE detection time can prevent proper communication. Unresolved, this fault prevents the drive from receiving critical control commands, leading to loss of control over the connected equipment.

Complete Troubleshooting Guide

1. 1

   Implement noise reduction measures, such as using shielded cables, grounding shields correctly, separating communication wiring from power lines, and installing an EMC noise filter.

2. 2

   Check H5 parameter settings and the controller's protocol settings to ensure communication compatibility.

3. 3

   Adjust the CE detection time (H5-09) to be longer if it's currently shorter than the required communication cycle time.

4. 4

   Inspect the communications cable for disconnections or damage, and replace it if necessary.

5. 5

   Review PLC software settings and hardware for any incompatibilities or problems causing the error.