There is an instruction at the right-hand side of the rung named “END”. “END” is an instruction when executed, which will cause the execution of the program file to end for the current program scan.
This rung is normally the last rung in the program file.
The “Insert Rung” command adds a rung above the current rung.
“Append Rung” is used to add a rung below the current rung.