Wires - GE PACSystems RX7i Cpu Programmer's Reference Manual

Chapter 4. Ladder Diagram (LD) Programming
4.11.6

Wires

Horizontal and vertical wires (H_WIRE and V_WIRE)
are used to connect elements of a line of LD logic
between functions. Their purpose is to complete the
flow of logic (power) from left to right in a line of
logic.
A horizontal wire transmits the BOOLEAN ON/OFF
state of the element on its immediate left to the
element on its immediate right.
A vertical wire may intersect with one or more
horizontal wires on each side. The state of the
vertical wire is the inclusive OR of the ON states of
the horizontal wires on its left side. The state of the
vertical wire is copied to all of the attached
horizontal wires on its right side.
Note: Wires can be used for data flow, but you cannot route data flow leftwards. Nor can two
separate data flow lines come into the left side of the same vertical wire.
210 PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual GFK-2950C