KUKA KRC4 Error Code 126

KUKA Robot Major System

Model: KRC4 | Code: 126

Applicable Systems
KR CYBERTECH

Symptoms

Exceeding adjustment limit. The robot has exceeded the software or hardware adjustment limit for position orspeed.

Possible Causes

  • Software position limit exceeded during motion
  • Axis range exceeded: commanded position outside allowed envelope
  • Speed limit exceeded during high-speed motion
  • Joint angle at mechanical limit

Troubleshooting Steps

  1. Step 1: Check the equipment status and fault indicators to confirm the active fault code
    Fault indicator or HMI displays code 126 as active
  2. Step 2: Verify all electrical connections, wiring harnesses, and connector seating
    All connections secure, no corrosion, loose pins, or damaged wires
  3. Step 3: Check the system diagnostic buffer or event log for detailed fault information
    Diagnostic buffer shows the specific fault cause and timestamp
  4. Step 4: Verify power supply stability and environmental conditions
    Power supply stable, environment within specifications
  5. Step 5: Restart the equipment or power-cycle the control system
    Equipment restarts and enters normal operating state
  6. Step 6: Contact manufacturer support if the fault persists after all checks
    Support provides specific troubleshooting guidance

How to Reset

To reset: 1) Identify and fix the root cause described in the fault symptoms. 2) Press RESET on the HMI or controller, or power-cycle the equipment. 3) If the fault recurs, contact manufacturer service. Caution: Document the fault code and context before resetting.

Frequently Asked Questions

  • Q: What does fault code 126 mean on the KUKA KRC4?

    Fault 126 on the KUKA KRC4 indicates: Exceeding adjustment limit. The robot has exceeded the software or hardware adjustment limit for position or speed. Refer to the equipment manual and manufacturer support for specific troubleshooting steps.

  • Q: Can I continue operating the equipment with fault 126 active?

    No. The equipment has detected a fault condition and has taken protective action (typically stopping or derating). Continuing to operate without fixing the root cause may cause further damage. Always investigate and fix the fault before resuming operation.

Related KUKA Fault Codes

Source: KUKA Robot Controller KRC4 Operating Manual, KUKA Roboter GmbH Documentation

Category: Robot