KUKA Robot codes
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KUKA Robot Controller

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Alarm KRC0026

KUKA Robot KRC0026 - WATCHDOG INTERPOLATION CYCLE **

This alarm indicates that the DSE (Drive and Sensor Electronics) subsystem has failed to trigger the software watchdog timer within the DPRAM (Dual-Port RAM) during an interpolation cycle. This is a critical real-time synchronization failure that prevents the robot controller from maintaining proper cycle timing and motion interpolation between the KRC main controller and the DSE subsystem.

KUKA RobotProgram/G-codeAdvanced

KRC0026

KUKA Robot KRC0026 - WATCHDOG INTERPOLATION CYCLE **

WATCHDOG INTERPOLATION CYCLE **

This alarm indicates that the DSE (Drive and Sensor Electronics) subsystem has failed to trigger the software watchdog timer within the DPRAM (Dual-Port RAM) during an interpolation cycle. This is a critical real-time synchronization failure that prevents the robot controller from maintaining proper cycle timing and motion interpolation between the KRC main controller and the DSE subsystem.

Common Causes

  • DSE processor malfunction or CPU failure preventing watchdog signal generation
  • DPRAM communication corruption or memory access failure between KRC and DSE
  • Defective DSE circuit board or hardware component failure
  • Corrupted DSE firmware or failed firmware update resulting in improper watchdog routine execution
  • Severe electromagnetic interference (EMI) or electrical noise disrupting real-time communication

Troubleshooting Steps

  1. 1Power cycle the KRC controller completely (power off for minimum 30 seconds) to reset DSE and DPRAM memory structures
  2. 2Verify all internal ribbon cable connections between KRC main board and DSE board are fully seated and undamaged
  3. 3Check for visible damage, corrosion, or burned components on the DSE circuit board and surrounding electronics
  4. 4Access the KRC diagnostics menu to verify DSE communication status and inspect DPRAM memory test results
  5. 5Perform a DSE firmware verification/reload from the controller's maintenance interface if available without requiring external tools
  6. 6If alarm persists after basic troubleshooting, contact KUKA service for DSE board replacement or complete controller recalibration

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