Which of the following statements is NOT correct for a subroutine command in the SLC 500 PLC language?
A) A return instruction (RET) is used to return to the calling program.
B) Subroutines can be nested.
C) You can call a subroutine from any part of a program.
D) A label is used to indicate where the subroutine should jump to.

Question

Quizplus · Accepted Answer

In the SLC 500 PLC language, subroutines are called and returned from using specific instructions (JSR for jumping to the subroutine and RET for returning), not labels. Labels are typically used in higher-level programming languages for jumps within the code, but in the context of SLC 500 and its ladder logic programming, the concept of using a label to indicate where a subroutine should jump to is not correct.

Which of the Following Statements Is NOT Correct for a Subroutine