What causes KUKA Robot alarm KRC0902?

Attempting to assign or operate on a BOOL, AXIS, or FRAME type where INT, REAL, CHAR, or ENUM is required. Using an incompatible array or structure type as the right operand in an expression. Mixing structured data types (ROBAXTP, PTP_PARAM, etc.) with primitive data type operations. Passing an incorrect parameter type to a function that expects INT, REAL, CHAR, or ENUM. Attempting arithmetic or comparison operations on non-numeric custom data types.

How do I fix KUKA Robot alarm KRC0902?

1. Review the line of code indicated in the alarm message and identify the right operand of the operation 2. Check the declared data type of the variable or expression used as the right operand 3. Verify that the right operand type matches one of the allowed types: INT, REAL, CHAR, or ENUM 4. If using a structure or custom type, extract the specific field that has a compatible primitive type 5. Apply explicit type conversion using casting functions (REAL(), INT(), etc.) if appropriate for the operation 6. Compare the function signature or operator definition to ensure correct parameter types are being passed

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0902

KUKA Robot KRC0902 - RIGHT OPERAND NOT EQUAL TO INT, REAL, CHAR, ENUM 2238

This alarm indicates a type mismatch error in KRL code where the right operand of an operation is not compatible with the expected data types (INT, REAL, CHAR, or ENUM). The compiler cannot perform the requested operation because the operand type does not match any of the allowed types for the given operator or assignment.

KUKA RobotSystemBasic

KRC0902

KUKA Robot KRC0902 - RIGHT OPERAND NOT EQUAL TO INT, REAL, CHAR, ENUM 2238

RIGHT OPERAND NOT EQUAL TO INT, REAL, CHAR, ENUM 2238

Common Causes

Attempting to assign or operate on a BOOL, AXIS, or FRAME type where INT, REAL, CHAR, or ENUM is required
Using an incompatible array or structure type as the right operand in an expression
Mixing structured data types (ROBAXTP, PTP_PARAM, etc.) with primitive data type operations
Passing an incorrect parameter type to a function that expects INT, REAL, CHAR, or ENUM
Attempting arithmetic or comparison operations on non-numeric custom data types

Troubleshooting Steps

1Review the line of code indicated in the alarm message and identify the right operand of the operation
2Check the declared data type of the variable or expression used as the right operand
3Verify that the right operand type matches one of the allowed types: INT, REAL, CHAR, or ENUM
4If using a structure or custom type, extract the specific field that has a compatible primitive type
5Apply explicit type conversion using casting functions (REAL(), INT(), etc.) if appropriate for the operation
6Compare the function signature or operator definition to ensure correct parameter types are being passed

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