LogrobotLM

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FANUC Alarm BELL-085 — PAUS Pulse coder communication error

FANUC BELL-085 (“PAUS Pulse coder communication error”): The axis control pcb sent the request signal, but did not receive serial data from the pulse coder. First check: Refer to troubleshooting section in the SYSTEM R-J Controller Series Electrical Connection and Maintenance Manual.

Updated 2026-09-17 · LogrobotLM reference

Description

The axis control pcb sent the request signal, but did not receive serial data from the pulse coder.

Remedy

Refer to troubleshooting section in the SYSTEM R-J Controller Series Electrical Connection and Maintenance Manual.

Related codes

BELL-083WARN Pulse coder battery low alarmBELL-084PAUS Motor overheat occurredBELL-086PAUS Pulse coder position compare errorBELL-087PAUS Collision Detection (Hand Broke)

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 →