What causes KUKA Robot alarm KRC0593?

Using more than 16 variables with complex data types or structures in INTERRUPT DECL logical expressions. Combining multiple slow variable references across different interrupt declarations at control and robot levels. Implementing nested or cascading conditional statements that evaluate numerous variables in interrupt conditions. Failing to optimize interrupt expressions by consolidating redundant variable evaluations. Adding safety-related variables or status flags that require cyclic monitoring beyond system capacity.

How do I fix KUKA Robot alarm KRC0593?

1. Count and document all slow variables used in each INTERRUPT DECL statement in your KRL source code 2. Simplify logical expressions by eliminating redundant variable checks and combining related conditions 3. Consolidate multiple interrupt declarations into single declarations where possible to reduce variable overhead 4. Replace slow variable evaluations with cached or pre-computed results to reduce real-time complexity 5. Use WorkVisual to analyze interrupt declaration load and verify optimization before compilation 6. Test the modified program with reduced interrupt complexity and gradually increase until stability is confirmed

KUKA Robot codes

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KUKA Robot Controller

System · Intermediate

Alarm KRC0593

KUKA Robot KRC0593 - Interrupt expression complexity exceeded

The alarm indicates that the total number of slow variables used across all INTERRUPT DECL declarations exceeds the system limit of 16. Slow variables are those that require extended evaluation time in logical expressions, and exceeding this threshold causes excessive CPU load on the control level, compromising real-time performance.

KUKA RobotSystemIntermediate

KRC0593

KUKA Robot KRC0593 - Interrupt expression complexity exceeded

Interrupt expression complexity exceeded

Common Causes

Using more than 16 variables with complex data types or structures in INTERRUPT DECL logical expressions
Combining multiple slow variable references across different interrupt declarations at control and robot levels
Implementing nested or cascading conditional statements that evaluate numerous variables in interrupt conditions
Failing to optimize interrupt expressions by consolidating redundant variable evaluations
Adding safety-related variables or status flags that require cyclic monitoring beyond system capacity

Troubleshooting Steps

1Count and document all slow variables used in each INTERRUPT DECL statement in your KRL source code
2Simplify logical expressions by eliminating redundant variable checks and combining related conditions
3Consolidate multiple interrupt declarations into single declarations where possible to reduce variable overhead
4Replace slow variable evaluations with cached or pre-computed results to reduce real-time complexity
5Use WorkVisual to analyze interrupt declaration load and verify optimization before compilation
6Test the modified program with reduced interrupt complexity and gradually increase until stability is confirmed

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