6
I/O Module Configuration Mismatch After Data Bus Reset
Wago · PFC200 PLC
What does 6 mean?
The detected I/O module configuration following an internal data bus reset does not match the configuration that was present after the last controller startup. This suggests a transient issue with the I/O bus communication or a configuration inconsistency requiring a controller restart.
Common Causes
- Transient internal data bus communication error leading to configuration discrepancy
- Temporary I/O module configuration discrepancy detected after an internal data bus reset
- Software or hardware glitch causing an unexpected internal data bus reset
Repair Steps & Checklist
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- 1
Restart the controller by first switching off the power supply and then switching it back on.
- 2
Alternatively, press the Reset button located on the controller.
Verified technical data. Last updated: March 2026
Related Faults
Source: Wago PFC200 PLC