Mitsubishi Electric MELSEC Q Series Programming Manual page 92

The program is executed from the top to the bottom, when the ladder is branched and ENs and ENOs are connected in
parallel.
(1)
(5)
The program is executed in the order as shown below when the MOV instruction (4) in the above figure is moved to the top.
(1)
(5)
5 WRITING PROGRAMS
90
5.2 Structured Ladder/FBD
(4)
(2)
Move to the top
(3)
(4)
(2)
(3)