Universal Robots e-Series Error Code C271A1: Runtime is too much behind.

Universal Robots Robot Minor System

Model: e-Series (UR3e/UR5e/UR10e/UR16e/UR20/UR30) | Code: C271A1

Applicable Systems
UR3 UR5 UR10 UR3e UR5e UR10e UR16e UR20 UR30

Symptoms

One of the threads might be using too much time (see log for more details).

Possible Causes

  • One of the threads might be using too much time (see log for more details).

Troubleshooting Steps

  1. Step 1: Consider using a Wait or sync() to split long program sequences that do not move the robot.
    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.

Related Universal Robots Fault Codes

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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

Published: 2026-11-01