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ErrorLib — Industrial Fault Code Library

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1 (Argument: 8)

Invalid Hardware/Firmware Combination

Wago · PFC200 PLC

What does 1 (Argument: 8) mean?

An invalid combination of controller hardware and firmware has been detected. This means the installed firmware version is incompatible with the controller's hardware revision, preventing proper operation and potentially causing system instability.

Common Causes

  • Firmware updated to an unsupported version for the specific hardware revision of the controller.
  • Incorrect controller hardware revision for the installed firmware.
  • Corruption of firmware leading to misidentification of hardware compatibility.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Switch off the power supply to the controller.

  2. 2

    Reduce the number of I/O modules connected.

  3. 3

    Switch the power supply back on to the controller.

Browse all codes in this manual (23)
Verified technical data. Last updated: April 2026

Related Faults

--Internal Data Bus Communication Error (Unidentified Module)0x00090003Modbus Slave TCP Start Failed0x00090006Modbus Slave UDP Start Failed
Source: Wago PFC200 PLC
Open Manual (Page 198)Search more codes in this manual