5
Flash Memory Erase Error
Wago · PFC200 PLC
What does 5 mean?
An error occurred during the process of erasing a sector of the controller's flash memory. This indicates a critical problem with the flash memory hardware or the controller's ability to manage its internal storage. This is a severe internal controller fault.
Common Causes
- Defective flash memory sector within the controller
- Internal controller hardware fault preventing flash erase operations
- Power instability during critical memory erase operations
Repair Steps & Checklist
Click steps to track your progress.
- 1
Switch off the power to the controller.
- 2
Replace the controller.
- 3
Switch the power back on after replacement.
Verified technical data. Last updated: March 2026
Related Faults
Source: Wago PFC200 PLC