Robotics in Manufacturing
SRVO-010

SRVO-010: Belt broken

The belt-broken digital input (RDI[7]) tripped on a robot model that monitors a drive belt.

What it means

The belt-broken digital input (RDI[7]) tripped on a robot model that monitors a drive belt. Only appears on robots where the belt-monitor system variable is enabled - so either the belt has a real problem or the signal wiring does.

Common causes

Ranked by what technicians most often find, most likely first.

  1. Actual belt damage or breakage on a belt-driven axis.
  2. RDI[7] signal fault in the robot connection cable.
  3. Belt-monitor enabled ($BELT_ENABLE true) on a configuration where it shouldn't be.

How to fix it

  1. Inspect the belt; repair or replace if damaged, then press RESET.
  2. If the belt is sound, check the RDI[7] circuit in the robot connection cable.
  3. Confirm $PARAM_GROUP[g].$BELT_ENABLE matches whether this robot model actually has a monitored belt.

Quick facts

Category
Servo
Affected series
R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family
SRVO

Related codes

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-09.Editorial process