Posted 3 Mar 2022 (edited) I am setting up some new barcode readers for a CJ2H PLC using EtherNet IP. These are nodes 134 and 135. For whatever reason, one of the older barcode scanners that have been in use for many years (node 131) doesn't show up whenever I do an upload. Physically all of the barcode readers are installed and communicating with the PLC. Is this an Omron software bug? Is there a fix so it doesn't confuse me (or other people working on this machine)? Thanks. Edited 3 Mar 2022 by kckku Share this post Link to post Share on other sites
Posted 3 Mar 2022 Have you tried an upload on a new network? Share this post Link to post Share on other sites
Posted 4 Mar 2022 (edited) 22 hours ago, photovoltaic said: Have you tried an upload on a new network? I tried what you suggested with a new network at another computer. The program did a scan but not all the nodes showed up. Still missing node 131. I then realized that there's an 'Add' button. So I used this to manually enter the addresses for nodes 131 and 180. Now they show up in the network tree. I went back into my original program with the missing nodes and noticed that the missing devices show up as 'unknown devices'. Totally weird. Edited 4 Mar 2022 by kckku Update information Share this post Link to post Share on other sites