What causes KUKA Robot alarm KRC0405?

Attempting to select program blocks in interrupt routines that are not active in the execution call hierarchy. Declaring more interrupt handlers than the system can simultaneously manage during program execution. Activating multiple interrupts through INTERRUPT ON commands that exceed the system limit. Trying to execute block selection in a subprogram called from a different context than the calling program. Complex nested interrupt structures with multiple levels of subroutines exceeding interrupt stack capacity.

How do I fix KUKA Robot alarm KRC0405?

1. Review the program call stack in the KUKA smartPAD debugger to identify which subprograms are currently active 2. Count the total number of INTERRUPT ON declarations in the main program and all called subprograms 3. Reduce the number of active interrupts by consolidating related interrupt handlers or using conditional activation 4. Ensure block selection is only performed on programs that are currently executing in the active call hierarchy 5. Restructure interrupt logic to activate interrupts only when required rather than maintaining constant declarations 6. Test the modified program with the KUKA smartPAD stepping functionality to verify proper interrupt behavior

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0405

KUKA Robot KRC0405 - Line selection not possible: too many Interrupts

An attempt to perform line selection in a local subprogram has failed because the subprogram is not present in the current caller stack. Additionally, the maximum number of allowed interrupt declarations or activations has been exceeded on the KRC4 system.

KUKA RobotSystemBasic

KRC0405

KUKA Robot KRC0405 - Line selection not possible: too many Interrupts

Line selection not possible: too many Interrupts

Common Causes

Attempting to select program blocks in interrupt routines that are not active in the execution call hierarchy
Declaring more interrupt handlers than the system can simultaneously manage during program execution
Activating multiple interrupts through INTERRUPT ON commands that exceed the system limit
Trying to execute block selection in a subprogram called from a different context than the calling program
Complex nested interrupt structures with multiple levels of subroutines exceeding interrupt stack capacity

Troubleshooting Steps

1Review the program call stack in the KUKA smartPAD debugger to identify which subprograms are currently active
2Count the total number of INTERRUPT ON declarations in the main program and all called subprograms
3Reduce the number of active interrupts by consolidating related interrupt handlers or using conditional activation
4Ensure block selection is only performed on programs that are currently executing in the active call hierarchy
5Restructure interrupt logic to activate interrupts only when required rather than maintaining constant declarations
6Test the modified program with the KUKA smartPAD stepping functionality to verify proper interrupt behavior

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