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.
- posted
13 years ago