Complex Ladder Diagrams
• Goal: Enter and edit ladder logic with branches and add comments.
- 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.
Download the program to the PLC and run it. Push buttons and see how it behaves.
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.