26042
Communication error, KPP/KSP (axis)
Kuka · KR C4 Controller
What does 26042 mean?
This fault indicates a communication error on the controller bus, specifically affecting the KPP or KSP drive unit. This prevents the controller from sending commands or receiving feedback from the drive, leading to axis control failure.
Common Causes
- Faulty or damaged EtherCat cabling
- Issues with the EtherCat stack configuration or operation
- Malfunction of the CCU (Cabinet Control Unit) or KPP/KSP modules
Repair Steps & Checklist
Click steps to track your progress.
- 1
Reinitialize the drive bus by cycling Power Off / Power On.
- 2
Inspect EtherCat cabling for damage and proper connection.
- 3
Check EtherCat stack status and configuration.
- 4
Check the CCU module for any status indicators or faults.
- 5
Check the KPP module.
- 6
Check the KSP module.
Verified technical data. Last updated: March 2026
Related Faults
Source: Kuka KR C4 Controller