I/O-LED 1-7

Reserved (Fault code 1, argument 7)

Wago · Modular I/O System PROFIBUS DP

What does I/O-LED 1-7 mean?

This fault code indicates an internal issue associated with a reserved function or a protected memory area within the Fieldbus Coupler. It typically points to a low-level hardware defect or an unrecoverable internal system error.

Common Causes

  • Internal hardware defect within the coupler affecting reserved functions or memory regions

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the Coupler.

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Verified technical data. Last updated: March 2026

Related Faults

I/O-LED 5-n*Internal bus fault during register communication with the I/O module n (Fault code 5, argument n)BUS-LED 1-1Insufficient configuration data (Fault code 1, argument 1)BUS-LED 1-2Excessive configuration data (Fault code 1, argument 2)
Source: Wago Modular I/O System PROFIBUS DP
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