What causes KUKA Robot alarm KRC0597?

Declaring the same digital input in multiple INTERRUPT statements or input monitoring blocks. Using a digital input variable in both the main program loop and a parallel interrupt declaration. Assigning the same digital input port through different function modules or library calls simultaneously. Duplicating digital input configuration in separate program sections without proper resource deallocation. Importing multiple programs or includes that reference the same physical digital input independently.

How do I fix KUKA Robot alarm KRC0597?

1. Search the entire project for all references to the problematic digital input using WorkVisual search functionality 2. Review all INTERRUPT DECL statements and input declarations to identify duplicate assignments 3. Consolidate multiple references to the same digital input into a single declaration and condition block 4. Implement a centralized input handling routine that manages all digital input monitoring through one interface 5. Verify program structure in the KRL source to ensure no included files or function modules duplicate input assignments 6. Compile and test the cleaned program to confirm the digital input is only assigned once per cycle

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0597

KUKA Robot KRC0597 - Digital input already assigned

This alarm occurs when a digital input is assigned and activated more than once within the same program execution cycle. The KRC4 system does not permit multiple concurrent cyclical assignments to the same digital input, as this creates ambiguous state conditions and unpredictable behavior in process control.

KUKA RobotSystemBasic

KRC0597

KUKA Robot KRC0597 - Digital input already assigned

Digital input already assigned

Common Causes

Declaring the same digital input in multiple INTERRUPT statements or input monitoring blocks
Using a digital input variable in both the main program loop and a parallel interrupt declaration
Assigning the same digital input port through different function modules or library calls simultaneously
Duplicating digital input configuration in separate program sections without proper resource deallocation
Importing multiple programs or includes that reference the same physical digital input independently

Troubleshooting Steps

1Search the entire project for all references to the problematic digital input using WorkVisual search functionality
2Review all INTERRUPT DECL statements and input declarations to identify duplicate assignments
3Consolidate multiple references to the same digital input into a single declaration and condition block
4Implement a centralized input handling routine that manages all digital input monitoring through one interface
5Verify program structure in the KRL source to ensure no included files or function modules duplicate input assignments
6Compile and test the cleaned program to confirm the digital input is only assigned once per cycle

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