INSTRUCTION INDIRECTION OUTSIDE OF DATA SPACE

What does 0029 mean?

An indirect address reference in the ladder program attempts to access memory locations outside of the entire data file space. This is a recoverable fault, indicating a programming error that could lead to unexpected behavior, data corruption, or controller instability.

• Indirect addressing logic (e.g., using a pointer or indexed addressing) calculates an address beyond the allocated data file memory.
• Incorrect array indexing or pointer arithmetic in the program.
• Data file sizes are smaller than anticipated by the program's indirect references.

Click steps to track your progress.

1. 1

   Correct the program logic to ensure that all indirect references point only to valid addresses within the defined data file space.

2. 2

   Recompile and reload the corrected program into the controller.

3. 3

   Enter the Run mode after the program is successfully reloaded.