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ABB Error 38201 — Serial Measurement Board (SMB) fault

Error

ABB 38201 (“Serial Measurement Board (SMB) fault”): Serial Measurement Board not detected on the measurement link. Likely part: Serial Measurement Board (SMB) (Serial Measurement Board (SMB)).

Updated 2026-10-22 · LogrobotLM reference

What it means

Serial Measurement Board not detected on the measurement link.

What to check

  • Check the configuration, cables and connectors to the SMB; check power supply/communication and replace the SMB if it is still missing.
  • Note: Functional equivalent of some measurement board losses on previous generations, but an IRC5-specific code.

Part to check / replace

ABB 38201 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 →