1 (Argument: 11)
Serial EEPROM Read Error
Wago · PFC200 PLC
What does 1 (Argument: 11) mean?
An error occurred while reading from the serial EEPROM. This indicates that the controller cannot reliably retrieve data from its non-volatile memory, which is essential for configuration and operation, potentially leading to incorrect behavior or system failure.
Common Causes
- Hardware malfunction of the serial EEPROM chip.
- Intermittent connection or faulty wiring to the EEPROM.
- Data corruption within the EEPROM memory cells.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Switch off the power supply to the controller.
- 2
Reduce the number of I/O modules connected.
- 3
Switch the power supply back on to the controller.
Verified technical data. Last updated: March 2026
Related Faults
Source: Wago PFC200 PLC