Okuma Alarm A-1109 – Error Occurred During CAS Operation

Alarm A-1109 indicates that an internal error occurred within the CAS (Collision Avoidance System) software.

CAS is responsible for virtual machine simulation, interference detection, and model-based collision prevention. When this alarm appears, CAS processing has stopped due to a software or calculation fault.

As a result:

• Interference detection may be disabled

• 3D model display may not function correctly

• Virtual machine simulation may stop

• Collision monitoring may be inactive

Possible causes include:

• CAS software malfunction

• Corrupted machine model data

• Invalid geometry or tool data

• Parameter inconsistency

• Software version incompatibility

Machine operation may continue, but collision avoidance functionality may be limited or unavailable.

Recommended actions:

1. Restart the control system.

2. Verify CAS model and machine data.

3. Check tool and workpiece geometry settings.

4. Reload CAS data if available.

5. Confirm software version compatibility.

If the error persists, CAS software diagnostics or update may be required.