I have yet to see any program even at the technical college (in Wisconsin - MATC, WCTC by County etc...) get very deep into PLCs. Colleges may talk about them and even have a few weeks discussing them. You probably could teach more in depth "blood and guts", "horror stories", and "do's and don'ts) from your experience. You will get more in depth on this web site. What the degree will do for you is open doors to jobs, employers, advancement, and careers that use specific criteria such as a BSEE from an ABET college.
College programs will typically broaden your horizons and give you some depth. In acedemia, depth of knowledge only comes with the Masters programs and then really the PhD. And then when you develop your Masters Thesis or PhD Dissertation, it is all "self study" in depth on a specific topic of interest to you and your advisor such as "Comparison of Transport Layer Protocols in Industrial Automation I/O Sub Systems that Exhibit Deterministic Behavior". (It may not be technically correct, but it sounds good and you can tell me that after you write your paper)
BTW - not only does this web site provide great technical information and conversation, it appears that it is a great careeer counciling place... Please pay the receptionist on the way out....