Posted 29 Mar 2018 Hi guys, I am trying to connect AB compactlogix 1769-L30ER through Ethernet cable to my laptop. I use Rslinx version 3.9 When I enter IP address it can find the CPU without any problem but it does not show the I/O. When I check the driver diagnostic, it says: Can't set port type to 288: no harmony object for this Ethernet I should mention that my OS is windows 7 and I turned off firewall as well. So, what does it mean and how I can get rid of this message? Thanks Share this post Link to post Share on other sites
Posted 30 Mar 2018 This link may help: You may want to try to delete the Harmony files too: go to either C:\Program Files\Rockwell Software\RSCommon C:\Program Files (x86)\Rockwell Software\RSCommon depending on if you have a 64 bit or 32 bit PC. Delete Harmony.hrc and Harmony.rsh (See Tech Note 769010 in the Rockwell Knowledgebase for more info on Harmony files) Share this post Link to post Share on other sites
Posted 30 Mar 2018 Thank AndrewG, I have read mentioned post and also deleted harmony file as well. I have just one harmony file as " Harmony.rsh " The problem is still on going and it is really bothering. Every time it is created automatically in that folder. Share this post Link to post Share on other sites