KUKA Robot codes
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KUKA Robot Controller

System · Intermediate

Alarm KRC0262

KUKA Robot KRC0262 - ACYCLIC DATA NOT RELEASED BY TEPRO

This alarm indicates that the TEPRO (Technology for Extended Process Reliability and Optimization) module has not released a semaphore lock that is preventing access to acyclic data structures. The semaphore mechanism is designed to protect data integrity during asynchronous communication, but when not properly released, it blocks subsequent acyclic data transactions from the interpreter or external systems.

KUKA RobotSystemIntermediate

KRC0262

KUKA Robot KRC0262 - ACYCLIC DATA NOT RELEASED BY TEPRO

ACYCLIC DATA NOT RELEASED BY TEPRO

This alarm indicates that the TEPRO (Technology for Extended Process Reliability and Optimization) module has not released a semaphore lock that is preventing access to acyclic data structures. The semaphore mechanism is designed to protect data integrity during asynchronous communication, but when not properly released, it blocks subsequent acyclic data transactions from the interpreter or external systems.

Common Causes

  • TEPRO process crashed or terminated abnormally without releasing the semaphore
  • Acyclic data write operation in TEPRO was interrupted before completion
  • Deadlock condition between multiple tasks accessing acyclic data simultaneously
  • Firmware bug or corruption in TEPRO module causing semaphore management failure
  • External interrupt or emergency stop occurred during acyclic data transaction

Troubleshooting Steps

  1. 1Document the alarm occurrence time and any preceding error messages or warnings in the KRC diagnostics log
  2. 2Perform a controlled power cycle of the KRC controller to reset semaphore states and clear the lock
  3. 3Verify TEPRO module is running correctly by checking the system status in the Teach Pendant diagnostics menu
  4. 4Inspect acyclic data structures for corruption using KRC system tools and reload if necessary
  5. 5Review TEPRO process code for potential deadlocks, infinite loops, or missing semaphore release statements
  6. 6If alarm persists after restart, contact KUKA support with diagnostic logs and consider firmware update or hardware replacement

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