FANUC Alarm HOST-281 — SMB: Time-out waiting for PC
FANUC HOST-281 (“SMB: Time-out waiting for PC”): The robot timed-out while waiting for the PC to respond to a PC Share request. First check: Verify the PC is properly connected to the network, and can be pinged on the network.
Updated 2026-09-17 · LogrobotLM reference
Description
The robot timed-out while waiting for the PC to respond to a PC Share request.
Remedy
Verify the PC is properly connected to the network, and can be pinged on the network. Verify the PC Share client tag is properly configured, and the PC has properly shared the location/directory being accessed. The default timeout value can be changed in System Variables. If the PC is too slow for the default timeout, set a more reasonable timeout value in seconds in $SMB_CLNT[X].$RSPTMOUT, and power-cycle the controller. If the problem persists, document the events that led to the error, and call your FANUC or FANUC Robotics technical representative.
Related codes
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 →