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FANUC Alarm SYST-144 — WARN Bad DO specfied by %s

FANUC SYST-144 (“WARN Bad DO specfied by %s”): Invalid or unassigned DOUT number specified in the indicated system variable. First check: Set the sysem variable to zero (no port used) or to a valid port number and ensure that the indicated DOUT is assigned.

Updated 2026-08-29 · LogrobotLM reference

Description

Invalid or unassigned DOUT number specified in the indicated system variable.

Remedy · Remède

Set the sysem variable to zero (no port used) or to a valid port number and ensure that the indicated DOUT is assigned.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-144 mean?
FANUC SYST-144 (“WARN Bad DO specfied by %s”): Invalid or unassigned DOUT number specified in the indicated system variable.
How do you troubleshoot FANUC alarm SYST-144?
Set the sysem variable to zero (no port used) or to a valid port number and ensure that the indicated DOUT is assigned.

Related codes / Codes liés

SYST-142WARN ABS time in sytmrev in pastSYST-143WARN pkt_data_size too bigSYST-145WARN DO specfied by %s OFFLINESYST-146WARN n_pkts invalid

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →