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FANUC Alarm SRIO-005 — WARN SERIAL PORT DSR OFF

FANUC SRIO-005 (“WARN SERIAL PORT DSR OFF”): Serial port DSR is off. First check: Check if serial port setup is correct.

Updated 2026-09-17 · LogrobotLM reference

Description

Serial port DSR is off.

Remedy

Check if serial port setup is correct. Check if cable is broken. Check if there exists a noise source near controller. Check target device status.

Related codes

SRIO-003WARN SERIAL PORT ALREADY OPENSRIO-004WARN SERIAL PORT NOT INITIALIZESRIO-006WARN SERIAL PORT PARITY ERRORSRIO-007WARN SERIAL PORT OVERRUN ERROR

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 →