What causes KUKA Robot alarm KRC0049?

External axis configured with asynchronous synchronization mode in the robot's axis configuration. Missing or incorrect synchronization parameters in the $AXIS_CONF or external axis setup file. External axis velocity or acceleration limits set incompatibly with main robot motion profiles. Communication latency or timeout between the KRC controller and external axis control module. Incorrect axis declaration or mounting configuration causing the controller to treat it as non-synchronized.

How do I fix KUKA Robot alarm KRC0049?

1. Verify the external axis configuration in the axis configuration file and confirm synchronization mode is set to synchronous rather than asynchronous if coordinated motion is required 2. Check the $AXIS_CONF.dat and external axis parameter files for proper axis declaration, velocity limits, and acceleration settings 3. Review the program logic to ensure external axis movements are explicitly synchronized with main robot axis commands using appropriate motion functions 4. Test communication integrity between the KRC controller and external axis interface by monitoring axis status in the diagnostics or teach pendant 5. Recalibrate or re-reference the external axis and verify proper encoder feedback and axis initialization 6. If asynchronous operation is intentional, document this in the program comments and ensure all motion logic accounts for the decoupled axis behavior

KUKA Robot codes

axismd.ai

KUKA Robot Controller

Servo/Axis · Basic

Alarm KRC0049

KUKA Robot KRC0049 - <axis number> DETACHED EXTERNAL AXIS

An external auxiliary axis has been configured and operated in an asynchronous (decoupled) mode, meaning it is not synchronized with the main robot axes during motion execution. This condition indicates the external axis is running independently without coordinated interpolation with the robot's primary kinematic chain, which may result in unexpected motion timing or coordination issues.

KUKA RobotServo/AxisBasic

KRC0049

KUKA Robot KRC0049 - <axis number> DETACHED EXTERNAL AXIS

<axis number> DETACHED EXTERNAL AXIS

Common Causes

External axis configured with asynchronous synchronization mode in the robot's axis configuration
Missing or incorrect synchronization parameters in the $AXIS_CONF or external axis setup file
External axis velocity or acceleration limits set incompatibly with main robot motion profiles
Communication latency or timeout between the KRC controller and external axis control module
Incorrect axis declaration or mounting configuration causing the controller to treat it as non-synchronized

Troubleshooting Steps

1Verify the external axis configuration in the axis configuration file and confirm synchronization mode is set to synchronous rather than asynchronous if coordinated motion is required
2Check the $AXIS_CONF.dat and external axis parameter files for proper axis declaration, velocity limits, and acceleration settings
3Review the program logic to ensure external axis movements are explicitly synchronized with main robot axis commands using appropriate motion functions
4Test communication integrity between the KRC controller and external axis interface by monitoring axis status in the diagnostics or teach pendant
5Recalibrate or re-reference the external axis and verify proper encoder feedback and axis initialization
6If asynchronous operation is intentional, document this in the program comments and ensure all motion logic accounts for the decoupled axis behavior

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