ABB Error 71301 — DeviceNet bus / I/O board / Wiring fault
ErrorABB 71301 (“DeviceNet bus / I/O board / Wiring fault”): Bus disabled, DeviceNet network communication failure: "A large number of communication errors have occurred on the DeviceNet network" (exact wording of the French message, RobotWare 6.08 cabinet). Likely part: Bus DeviceNet / Carte d'E/S / Câblage (Bus DeviceNet / I/O board / Câblage).
Updated 2026-10-22 · LogrobotLM reference
What it means
Bus disabled, DeviceNet network communication failure: "A large number of communication errors have occurred on the DeviceNet network" (exact wording of the French message, RobotWare 6.08 cabinet).
What to check
- Check the bus 24 V supply, wiring and connectors, topology, termination resistor(s) and DeviceNet modules/boards.
- Isolate the network branches if the fault is intermittent.
- Note: In the field log, 71301 never occurs alone: it follows 71299 (loss of 24 V) within the same second, then 71412 (power restored) 2 s later. The cause is therefore the bus power supply, not the line quality. Three occurrences of this triplet in one year, on unrelated dates.
Part to check / replace
ABB 71301 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
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 →