Complex Ladder Diagrams
• Goal: Enter and edit ladder logic with branches and add comments.
• Instructions:
- Start by disconnecting from the PLC by selecting “Comms”, then “Go Offline”. Edit the program to look like the program below by dragging down a normally open contact, and adding the numbers shown.
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Download the program to the PLC and run it. Push buttons and see how it behaves.
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Go offline and add in the branch in the figure below. To do this drag down a branch icon from the bar above to a green box before the two input contacts. Then use the mouse to drag the other side of the branch (shown as a red box) to the other side of the input contacts.