Posted 28 Dec 2020 I have an open source library for Ethernet/IP and Modbus PLC communications. It also support PCCC-type PLCs like PLC-5, SLC and MicroLogix via encapsulation in CIP/EIP (Ethernet/IP). I just had a user let me know that they have a PLC-5/80 that apparently never got fully updated to support Ethernet/IP. It appears to only support CSP (port 2222). I have most of the code already, so I want to support CSP. I have a converted PLC-5/30 with a 1785 sidecar. It shows open ports on port 2222 and 44818, but if I connect to port 2222 using Ron Gage's code, it immediately closes the connection. I read somewhere (here? I think it was a comment from Ken Roach) that this was used to tell RSLinx to try the other protocol. I want to use some sort of PLC that "speaks" CSP in order to write up support for it in my library. Is that something that I can do with my old PLC-5? I looked around in RSLogix 5 to see if there was something obvious to re-enable CSP on my PLC-5 but I could not find anything. Anyone have any pointers? I might think about going on eBay to find some old hardware, but how could I even tell if something supports CSP? Even a simulator would be fine. Share this post Link to post Share on other sites
