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ErrorLib — Industrial Fault Code Library

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BUS-LED 1-2

Excessive configuration data (Fault code 1, argument 2)

Wago · Modular I/O System PROFIBUS DP

What does BUS-LED 1-2 mean?

The Fieldbus Coupler has excessive configuration data. This problem is usually caused by a defective PROFIBUS GSD file or improper entry of configuration data, which can lead to configuration mismatches and operational errors during coupler startup.

Common Causes

  • Defective GSD file used during PROFIBUS configuration
  • Improper or excessive entry of configuration data during coupler setup

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Get in contact with WAGO support.

Browse all codes in this manual (21)
Verified technical data. Last updated: April 2026

Related Faults

BUS-LED 1-1Insufficient configuration data (Fault code 1, argument 1)BUS-LED 2-nFaulty configuration byte n (Fault code 2, argument n)BUS-LED 3-1Insufficient configuration data (Fault code 3, argument 1)
Source: Wago Modular I/O System PROFIBUS DP
Open Manual (Page 98)Search more codes in this manual