Ladder logic

Contacts on the left feed an output on the right. Contacts in series are AND, branches in parallel are OR, and a normally-closed contact (┤/├) is NOT. Click a contact or the output to edit it, drag contacts to rearrange them, and drag the ⠿ handle to reorder rungs. Use Rung result contacts and Internal outputs to build rungs from other rungs. A rung placed later wins when two rungs drive the same output.