I'm brand new to the PLC World. We are getting ready to upgrade our W&H System, and I want to get some reading material that will give me a crash course on this stuff. Any recommendations?

Thanks

There is plenty of material in the Articles section.
Is there any particular model you might be interested in
(PLC2, PLC5, SLC, Contrologix...)?

Allan Bradley website - PLC manuals for download

Thank you. I appeciate the feedback. I'll need to do a little more investigative work to find out exactly what we have, so that I can narrow down what manuals to read. Thanks for the help.