Greetings, I have a network with five DL06 PLCs and a C-more EA9 touch panel. One of the PLCs is programed to read/write to/from the other four and the touch panel reads/writes to/from all the PLCs. Touch panel using Automation Direct Ethernet driver. None of the ECOM-100s is configured for P/P. This worked great for several years but now there is no communication between the PLCs. Communication with the touch screen is OK. Net Edit 3 sees all the ECOM100's (latest firmware) but all fail the Check CPU test. The touch panel started out as version 5.1 but has been kept up to date. Any thoughts? Thanks.