SNLA495 February   2026 DP83826E , DP83826I , TMS320F28P650DH , TMS320F28P650DK

 

  1.   1
  2.   Abstract
  3.   Revision History
  4. 1EtherCAT Network and Slave Structure
  5. 2Criteria for EtherCAT Link Multi-Layer Detection
  6. 3Layered Troubleshooting Methods for EtherCAT Link Down Fault
    1. 3.1 ESC DL Port Status Check - Fault Localization
    2. 3.2 Enhanced Link Configuration Check
    3. 3.3 MI Link Configuration Check
    4. 3.4 Physical Layer Link Anomaly Troubleshooting
  7. 4F28P65 + DP83826 EtherCAT Link Down Troubleshooting Case
  8. 5Summary
  9. 6References

5 Summary

Stable and reliable link status is critical to an EtherCAT application, and this article provides a detailed description of troubleshooting methods for the Link Down fault in EtherCAT applications. Using the F28P65 + DP83826 EtherCAT implementation as an example, this article describes a detailed troubleshooting process, along with fault indications of critical register information, and illustrates a real-world fault analysis case to share detailed debugging guidance and analysis methods for the Link Down fault in EtherCAT applications.