I setup a new PLC on our development server. It's an AB 1756-L85E on 28.012. I set it up on the gateway using the Allen-Bradley Logix Driver. In the past I've never had to do anything more than give a PLC a name and an IP address and it just worked. I did the same this time and all I can see in the OPC browser is the Diagnostic folder and the tags beneath it. I setup the PLC on a couple different gateways and same results for all of them. Auto-browsing is turned on... Is there something on the PLC that I need to check that might be different from some of my others that's not obvious?
The slot number defaults to 0, is your PLC at a different slot in a chassis?
/facepalm
Thanks Kevin