Universal Robots e-Series Error Code C740A20: 24V IO voltage is outside of the allowed range: {float}V

Universal Robots Robot Minor Power

Model: e-Series (UR3e/UR5e/UR10e/UR16e/UR20/UR30) | Code: C740A20

Applicable Systems
UR3 UR5 UR10 UR3e UR5e UR10e UR16e UR20 UR30

Symptoms

An error occurred in the 24V IO supply

Possible Causes

  • An error occurred in the 24V IO supply

Troubleshooting Steps

  1. Step 1: Check the fuse in the control box,
    Check if the issue is resolved after this step
  2. Step 2: Check supply to the IOs is attached,
    Check if the issue is resolved after this step
  3. Step 3: Check for shorts on anything attached to the IOs,
    Check if the issue is resolved after this step
  4. Step 4: Conduct a complete rebooting sequence,
    Check if the issue is resolved after this step
  5. Step 5: Update software,
    Check if the issue is resolved after this step
  6. Step 6: Contact your local Universal Robots service provider for assistance
    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

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

Category: Robot