
Ladder
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Intersecting lines: Junction
To check for junctions:
1. When you draw intersecting lines with the Line Draw tool, the line intersections are
simply 90 degree angles.
2. After compiling the project, there will be a small circle at each junction. This circle
shows you that the compiler recognized these line intersections as junctions.
Ladder Nets with Feedbacks
According to IEC 1131 - 3, it is possible to create Ladder Diagram nets that contain
feedback loops, i.e. where an element is used as both contact(s) and coil(s) in the same
net.
In Ladder Diagram, all external input values such as those associated with contacts are
gathered before each net is evaluated.
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