Posted 2 Feb 2018 I'm writing an CIP-driver in C# for communication between a Rockwell PLC and a Raspberry Pi. Currently I'm debugging the Connect/Disconnect process. Everything works fine, I register a session, I start an start forward. When I press disconnect, I send an forward close to the PLC. En this seams to work. Only in Wireshark I see an error: "Destination Unknown". But I can't figure out why the destination is wrong. I filed everything in the correct order according to the table below. Share this post Link to post Share on other sites
Posted 2 Feb 2018 (edited) Does your Connection_Path match that of the Forward Open and the Connection Serial Number match that of what was returned by the Forward Open? If you need reference packets or something to test on the Pi for comparison, AdvancedHMI works on the Pi and has a full working CIP driver. It is a .NET application. advancedhmi.com/forum/index.php?topic=666.0 Edited 2 Feb 2018 by arj3090 Share this post Link to post Share on other sites
Posted 2 Feb 2018 Hello, Download the demo for PeakHMI and use it to capture packets in Wireshark. If you need any help contact PeakHMI support. Share this post Link to post Share on other sites
