Posted 29 Mar 2021 I saved a project I am working on, had to conver it before I saved? Came back to make edits and when I went to add a new rung it come up with this error? Any fixes? Many thanks, Sean Share this post Link to post Share on other sites
Posted 29 Mar 2021 (edited) You are using a device which does not exist i the PLC. what did you change ? check the Device Tab in the PLC parameters to see your settings. Did you try to add an ST0 for instance ? By Default these are set to 0 in a system Q Edited 29 Mar 2021 by Gambit 1 person likes this Share this post Link to post Share on other sites