LogrobotLM

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FANUC Alarm HOST-211 — WARN SM: Connection Write Buffer is full

FANUC HOST-211 (“WARN SM: Connection Write Buffer is full”): Write buffer is full. First check: Check remote host and network connection.

Updated 2026-09-17 · LogrobotLM reference

Description

Write buffer is full. The remote host may not be responding or the network is down.

Remedy

Check remote host and network connection.

Related codes

HOST-209WARN SM: Connection AbortedHOST-210WARN SM: Connection Timed OutHOST-212WARN SM: Write Direction shut down by PeerHOST-213WARN SM: Read Direction shut down by Peer

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 →