KUKA Robot codes
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KUKA Robot Controller

System · Basic

Alarm KRC0428

KUKA Robot KRC0428 - START KEY REQUIRED

This alarm indicates that a START command was issued via text input or software interface rather than through the physical START button on the teach pendant or control panel. The KUKA KRC controller requires the START key to be physically pressed to initiate robot motion for safety compliance and operational verification.

KUKA RobotSystemBasic

KRC0428

KUKA Robot KRC0428 - START KEY REQUIRED

START KEY REQUIRED

This alarm indicates that a START command was issued via text input or software interface rather than through the physical START button on the teach pendant or control panel. The KUKA KRC controller requires the START key to be physically pressed to initiate robot motion for safety compliance and operational verification.

Common Causes

  • Program execution initiated through KCP (KUKA Control Panel) software without physical START button press
  • Remote or networked command attempting to start robot motion without hardware button activation
  • Script or macro routine calling start function programmatically instead of using hardware input
  • Teach pendant software interface sending START command while physical button is not engaged
  • Safety system requiring physical START key confirmation during program execution or restart

Troubleshooting Steps

  1. 1Press the physical START button on the teach pendant or control panel to initiate robot motion rather than using text commands
  2. 2Verify the safety circuit is properly connected and the START key switch is functioning correctly with continuity testing
  3. 3Check that the program is not attempting to execute START commands via software API; modify program logic to require hardware button input
  4. 4Ensure the teach pendant is in the correct mode (Automatic or Manual) for the desired operation and START button is accessible
  5. 5Review program file for any textual START commands or automated startup routines and remove or replace with proper hardware-based activation
  6. 6Restart the KRC controller and attempt robot startup using only the physical START button to confirm proper safety function

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