Data fault on internal bus or Internal bus interruption on Coupler (Fault code 4, argument 0)

Was bedeutet I/O-LED 4-0 ?

A data fault or a complete interruption of the internal bus has occurred, originating from or directly at the Fieldbus Coupler itself. This critical issue prevents any communication with all connected I/O modules, rendering the entire node inoperable.

• Hardware defect in the coupler's internal bus interface circuitry
• Severe data corruption or physical interruption of the internal bus within the coupler

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1. 1

   Replace the Coupler.