What does the FLL instruction specifically do in array handling?

The FLL instruction in Rockwell ControlLogix programming is specifically designed to fill an array with a single value. This functionality is crucial for initializing arrays with a default value or for updating all elements of an array to the same value during a program's execution. By being able to fill an entire array efficiently, the FLL instruction streamlines code and enhances readability.

In contrast, other options may involve different array handling processes. The option that involves copying data from one array to another describes the function of a different instruction that is focused on data replication rather than filling, while clearing an array typically refers to setting all elements to zero or a similar state. The function that moves data from one array to a variable deals with data transfer rather than filling the array, which is distinctly separate from the purpose of the FLL instruction.