Universal Robots CB3 Error Code C103A1: Connection to Safety Control Board lost

Universal Robots Robot Critical Safety

Model: CB3 (UR3/UR5/UR10) | Code: C103A1

Applicable Systems
UR3 UR5 UR10 UR3e UR5e UR10e UR16e UR20 UR30

Symptoms

PC did not receive 3 packets in a row

Possible Causes

  • PC did not receive 3 packets in a row

Troubleshooting Steps

  1. Step 1: Check that the Ethernet cable between Motherboard and Safety Control Board is connected,
    Check if the issue is resolved after this step
  2. Step 2: Conduct a complete rebooting sequence
    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.

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

Category: Robot