Executing Order - Mitsubishi Electric MELSEC Q Series Structured Programming Manual

5.2.3

Executing order

The following figures explain the program executing order.
The operation order in a ladder block is from the left power rail to the right and from the top to the
bottom.
The program is executed from the left power rail to the right when the ladder is not branched and
ENs and ENOs are connected in series.
The program is executed from the top to the bottom, when the ladder is branched and ENs and
ENOs are connected in parallel.
The program is executed in the order as shown below when the MOV instruction ( ) in the
4
above figure is moved to the top.
Move to the top
5.2 Structured Ladder/FBD
5-16
5.2.3 Executing order