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ABB Error 71390 — DeviceNet I/O network fault

Warning

ABB 71390 (“DeviceNet I/O network fault”): DeviceNet I/O network recovery after an outage: "The DeviceNet network is back in service after an outage." The bus has been reset and the units are being polled again. Likely part: Réseau d'E/S DeviceNet (Réseau d'E/S DeviceNet).

Updated 2026-10-22 · LogrobotLM reference

What it means

DeviceNet I/O network recovery after an outage: "The DeviceNet network is back in service after an outage." The bus has been reset and the units are being polled again.

What to check

  • Check that all declared units have actually come back (unit status in the I/O view).
  • A unit missing after recovery does not always generate a new message: check explicitly.
  • Note: Complements 71412: 71412 concerns the power supply, 71390 the logical return to service of the network.

Part to check / replace

ABB 71390 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

41555I/O unit / Bus cable / Process equipment fault71058I/O unit communication lost7129924 V DeviceNet power supply fault

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →