Maple Systems MAPware-7000 - Manual (Page 278)

278 MAPware-7000 Programming Manual
1010-1040, Rev. 02
Each element in a rung is executed according to the following rules:
1. When there is no vertical
connection, each element is
executed on the rung from left
to right.
2. When an ‘OR’ connection occurs,
the logic is executed first, before
continuing to the next element
on the rung.
3. When a branch occurs, each
element of a line is executed,
starting with the top line of the
branch.
4. This complicated example shows
the sequence of element
execution when both ‘OR’
connections and branches exist.
Note: the numbers above next to each element indicate the sequence at which
they are executed in the program.