100B0000 hex
Non-volatile Memory Data Corrupted
Omron · NX-series CPU Unit
What does 100B0000 hex mean?
A critical file required by the Controller, stored in non-volatile memory, is either missing or has become corrupted. This error is detected at power-on or during a Controller reset, leading to a major fault level that stops both the user program and Controller operation.
Common Causes
- The Controller's power supply was interrupted or turned OFF while the BUSY indicator was lit, indicating an active memory operation.
- Momentary power interruption to the Controller while the BUSY indicator was lit.
- Failure of the CPU Unit hardware.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a Memory All Clear operation on the Controller and then download the project from Sysmac Studio.
- 2
Measure the incoming power supply voltage and frequency to the Controller. Ensure it consistently meets the specified rated voltage and frequency for stable operation.
- 3
If the error persists after performing memory clear and verifying power supply, replace the CPU Unit.
Verified technical data. Last updated: March 2026
Related Faults
Source: Omron NX-series CPU Unit