KUKA Robot codes
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KUKA Robot Controller

Program/G-code · Basic

Alarm KRC0531

KUKA Robot KRC0531 - Command syntax error

This alarm indicates that a command submitted to the KUKA KRC controller contains invalid syntax that prevents proper interpretation and execution. The controller's command parser has detected malformed instructions in the program code or manual input that do not conform to KRL (KUKA Robot Language) syntax requirements or the expected command format for the specific controller module.

KUKA RobotProgram/G-codeBasic

KRC0531

KUKA Robot KRC0531 - Command syntax error

Command syntax error

This alarm indicates that a command submitted to the KUKA KRC controller contains invalid syntax that prevents proper interpretation and execution. The controller's command parser has detected malformed instructions in the program code or manual input that do not conform to KRL (KUKA Robot Language) syntax requirements or the expected command format for the specific controller module.

Common Causes

  • Incorrect KRL syntax in program code such as missing parentheses, brackets, or semicolons
  • Invalid variable names or undeclared variables used in commands
  • Improper function call syntax or incorrect number of parameters passed to a function
  • Malformed motion commands with invalid axis values, coordinates, or speed specifications
  • Special characters or encoding issues in the source file that corrupt the command structure

Troubleshooting Steps

  1. 1Review the program code in KRC editor and verify all KRL syntax against KUKA documentation, checking for missing delimiters and proper statement formatting
  2. 2Validate that all variables are properly declared with correct data types before use in commands
  3. 3Verify function calls have the correct number and types of parameters matching the function signature
  4. 4Check for non-ASCII or corrupted characters in the source file by opening it in a text editor and resaving with proper encoding
  5. 5Compile the program in the KRC development environment to generate detailed syntax error messages with line numbers
  6. 6If using external command input, verify the communication protocol format and ensure commands adhere to the expected interface syntax specifications

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