In FANUC programming, how is the execution of a subroutine initiated?

In FANUC programming, the execution of a subroutine is initiated using a specific CALL instruction. This instruction serves as a method for the main program to invoke the subroutine, essentially providing a way to modularize code for better organization and reusability. When the CALL instruction is executed, the control is transferred to the subroutine, allowing that section of code to run independently.

This allows programmers to write complex programs more efficiently, as they can use the same subroutine across different parts of the program or in multiple programs without rewriting the code. After the subroutine has been executed, control returns to the point immediately following the CALL instruction in the main program.

In contrast, defining the subroutine in the main program or creating a dedicated program does not directly initiate the execution; they are parts of the overall setup that support the proper functioning of the CALL instruction. A WAIT instruction is used for pausing operations and is unrelated to initiating subroutines.