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ABB Error 38103 — SMB / cable SMB / Axis Computer fault

Error

ABB 38103 (“SMB / cable SMB / Axis Computer fault”): Loss of communication between the Axis Computer and the Serial Measurement Board. Likely part: SMB / Câble SMB / Axis Computer (SMB / cable SMB / Axis Computer).

Updated 2026-10-22 · LogrobotLM reference

What it means

Loss of communication between the Axis Computer and the Serial Measurement Board.

What to check

  • Check the SMB cable and connectors, shielding/ground, oxidation, power supply and SMB; check for electromagnetic interference.
  • Replace the SMB or the cable if necessary.
  • Note: Very well documented on IRB 6700/IRC5; other interventions show intermittent faults related to connections, cables or the SMB.

Part to check / replace

ABB 38103 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

20032Revolution counter not updated20033Axis not synchronized38034Axis Computer / SMB / Serial measurement cable 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 →