1 (Argument: 12)
Serial EEPROM Access Timeout
Wago · PFC200 PLC
What does 1 (Argument: 12) mean?
The time allocated to access the serial EEPROM was exceeded. This indicates a failure to read from or write to the EEPROM within the permissible time limit, potentially due to a hardware fault in the EEPROM or a communication issue on the controller's internal bus.
Common Causes
- Hardware malfunction of the serial EEPROM causing slow or unresponsive behavior.
- Issues with the controller's internal bus or EEPROM interface.
- Severe data corruption that hinders timely access.
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 to the controller.
Verified technical data. Last updated: March 2026
Related Faults
Source: Wago PFC200 PLC