Universal Robots CB3 Error Code C49A200: Secondary RS485 bus is down

Universal Robots Robot Minor System

Model: CB3 (UR3/UR5/UR10) | Code: C49A200

Applicable Systems
UR3 UR5 UR10 UR3e UR5e UR10e UR16e UR20 UR30

Symptoms

Bus for: Teach Pendant, Processor A and Processor B on SCB

Possible Causes

  • Bus for: Teach Pendant, Processor A and Processor B on SCB

Troubleshooting Steps

  1. Step 1: Check TCP/IP-12V cable to Teach Pendant
    Check if the issue is resolved after this step

How to Reset

Power cycle the robot controller and perform a complete reboot sequence. If the error persists, update the software to the latest version.

Source: Universal Robots Official Error Codes Directory (https://www.universal-robots.com/manuals/EN/PDF/Shared/ErrorCodes/ErrorCodes.pdf)

Category: Robot