KUKA Robot codes
AxisMD

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KUKA Robot Controller

Servo/Axis · Basic

Alarm KRC0243

KUKA Robot KRC0243 - Ackn. servobus DSENo. participant No. not available

This alarm indicates a communication failure on the servo bus where the specified participant device number is not responding or cannot be acknowledged. The servo bus system expects to communicate with a specific axis drive or device, but the configured device number is either missing, offline, or improperly addressed in the system configuration.

KUKA RobotServo/AxisBasic

KRC0243

KUKA Robot KRC0243 - Ackn. servobus DSENo. participant No. not available

Ackn. servobus DSENo. participant No. not available

This alarm indicates a communication failure on the servo bus where the specified participant device number is not responding or cannot be acknowledged. The servo bus system expects to communicate with a specific axis drive or device, but the configured device number is either missing, offline, or improperly addressed in the system configuration.

Common Causes

  • Servo drive or axis controller is powered off or not initialized
  • Incorrect device number configured in the servo bus parameter settings
  • Broken or loose servo bus cable connection between controller and drive
  • Faulty servo drive hardware or defective communication module
  • Servo bus termination resistor is missing or improperly installed

Troubleshooting Steps

  1. 1Verify that all servo drives and axis controllers are powered on and fully initialized before robot startup
  2. 2Check the servo bus device number configuration in the KUKA.Conf or axis configuration files against the actual hardware setup
  3. 3Inspect all servo bus cable connections for physical damage, loose connectors, or corrosion and reseat connections firmly
  4. 4Use the KUKA diagnostics software to scan the servo bus and verify all expected participant devices are detected and responding
  5. 5Test the servo drive by attempting direct communication or power cycling it separately to determine if hardware failure exists
  6. 6If device number mismatch is confirmed, update the configuration with the correct participant number and perform a controlled startup sequence

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