Posted 22 Apr 2015 Hi Guys I'm new to Omron PLC's and the NB HMI series terminals. I have a question regarding the status of a currently logged in user. What memory area bit can I check to see if a user is actually logged in ? Secondly, where can I find a document that shows the memory areas and any system words/bits ? I found bits and pieces here and there but nothing that shows the memory area layout in full. Regards Steve Share this post Link to post Share on other sites
Posted 23 Apr 2015 The manuals get installed with the program, here: Section 3-11 of the Operations Manual has the system bits and words in it. You can also see the system words when you use an object on the screen. For instance, when adding a numerical display, you can check the System Memory button on the Basic Property tab and it will show the system words (in this case, since it is a word function) with descriptions. If using Security Levels, then LW9042 has the current security level shown. If using Permissions, then LW9504 and LW9505 (32 bits) contain the current user authority. Share this post Link to post Share on other sites