Communication way

[Tom749 0]

When I use AB Rockwell PLC there are lots of communication ways at there. For instance, Ethernet / Controlnet / Devicenet What are the differences, usages and exact concept for them? (Can you give me pdf files or web site for understanding those?) Thanks for your help in advance.

[BobLfoot 302]

Try http://ab.rockwellautomation.com/Networks-and-Communications -- it's what google recommends.