Posted 20 Feb 2019 Hello PLC experts, I am master student currently writing thesis. For this, I have a initial task of making some changes to PLC program (Just started getting to know about PLCs- complete beginner). I have a BECKHOFF cx 9020 PLC connected to my notebook using ethernet. I am using TWINCAT 3.1 (VS) as IDE. Firstly, I cannot find my PLC IP address connected to my notebook . I added the route in the Twincat and it shows the PLC is connected. When, I am trying to run a program (activate boot project), I am unable to login to the PLC. It gives an error "login failed for application port 851". What I undertood from BECKHOFF scripts, there is something wrong with the ADS ams net ID which I am trying to figure it out. I appreciate all the help. Thank you. Share this post Link to post Share on other sites
Posted 12 May 2019 What is the exact order of CX9020? May be the runtime of your Cx9020 is TwinCAT 2 . In this case you should not use TwinCAT 3 Share this post Link to post Share on other sites
