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 1-5Fault during reading from the FLASH memory (Fault code 1, argument 5)BUS-LED 5-2Maximum output data length exceeded (Fault code 5, argument 2)I/O-LED 4-0Data fault on internal bus or Internal bus interruption on Coupler (Fault code 4, argument 0)
Source: Wago Modular I/O System PROFIBUS DP
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