I want/need to replace a few relay-logic controls with PLCs. Typically, a
machine is using 6 to 8, 3 or 4 pole DT relays, 6 to 8 limit switches and 3
to 4 operator switches, and 4 to 6 hydraulic/pneumatic valves. Should be
ideal for PLCs. I need to learn ladder programming. On the web, there are
plenty of tutorials but everything I've seen or tried is lacking in
translating the real-life process into a program. Any direction I should
look? A lot of my stuff is old and doesn't have schematics yet alone a flow
chart. The guy I had that was very good at this retired and moved to SC.