Posted 2 Apr 2016 Hi All, We have a 4X Rx3i PLCs that use Ethernet Global Data (EGD) to talk to each other. At the moment we a facing EDG communication fault being generated and it trips the entire pumps What the likely causes of EDG faults: We have replaced PLC Ethernet Interface Modules-no fix We have tested the fiber optic cable-the readings show its OK Also,can someone explain what PLC heartbeat is? Share this post Link to post Share on other sites
Posted 2 Apr 2016 See my answer here: http://www.plctalk.net/qanda/showpost.php?p=684527&postcount=4 Share this post Link to post Share on other sites