A259.12
Task Error
Omron · SYSMAC CJ2 CPU Unit
What does A259.12 mean?
This flag indicates a general Task Error. This occurs when an unspecified error is detected during the execution of a program task within the CPU. This can encompass a range of runtime issues.
Common Causes
- Uncaught runtime error within a specific program task (e.g., division by zero, null pointer dereference, out-of-bounds array access).
- Task scheduling conflicts or resource contention issues.
- External interrupt or event handler failure within a task context.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Isolate the program task where the error occurs and meticulously debug its logic, focusing on data manipulation and control flow.
- 2
Check task execution order and priorities in the PLC setup to identify potential conflicts or deadlocks.
- 3
Enable detailed error logging for the specific task if available to gain more insight into the runtime fault.
Verified technical data. Last updated: March 2026
Related Faults
Source: Omron SYSMAC CJ2 CPU Unit