I/O-LED 1-6
Changed I/O module configuration found after AUTORESET (Fault code 1, argument 6)
Wago · Modular I/O System PROFIBUS DP
What does I/O-LED 1-6 mean?
The Fieldbus Coupler detected a discrepancy between its configured I/O module arrangement and the physically connected modules immediately after an AUTORESET. This means the actual hardware setup of the I/O node does not match the software configuration stored in the coupler.
Common Causes
- Physical I/O module arrangement does not match the current software configuration
- I/O modules were added, removed, or reordered without updating the coupler's configuration
Repair Steps & Checklist
Click steps to track your progress.
- 1
Adapt the configuration in the engineering software to precisely match the physically connected I/O module arrangement.
- 2
Load the updated configuration onto the coupler.
- 3
Cycle the supply voltage of the coupler (off then on again) to restart the device and apply the new configuration.
Verified technical data. Last updated: March 2026
Related Faults
Source: Wago Modular I/O System PROFIBUS DP