LogrobotLM

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FANUC Alarm SYST-144 — WARN Bad DO specfied by …

Manufacturer wording — WARN Bad DO specfied by %s
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SYST-144 (“WARN Bad DO specfied by …”): 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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

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

SYST-142WARN ABS time in sytmrev in pastSYST-143WARN pkt_data_size too bigSYST-145WARN DO specfied by … 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. How this reference is built →