Drives error Ax no.: 79
KSD EEPROM Communication Error (Control Unit)
Kuka · KR C2 Robot Controller
What does Drives error Ax no.: 79 mean?
A communication error has occurred with the EEPROM in the control unit of the servo drive module for the specified axis (Ax). This suggests an issue with data storage or retrieval within the KSD's control unit.
Common Causes
- Communication error between the KSD control unit and its EEPROM.
- Faulty EEPROM chip on the control unit.
- Intermittent connection issues to the EEPROM.
- EEPROM data corruption.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the KSD module for visible damage or loose connections.
- 2
Restart the controller.
- 3
If the error persists after restart, exchange the KSD module.
Verified technical data. Last updated: March 2026
Related Faults
Source: Kuka KR C2 Robot Controller