Checking the EtherNet/IP Communications 5.7. Confirm that the EtherNet/IP communications are performing normally. Checking the Connection Status 5.7.1. Check the connection status of EtherNet/IP. 17 1 Check that there is a solid green light on I/O OK. If the I/O OK LED is solid green, the controller is communicating with the RFID System Open Module Properties Report: EtherNetIP Module (ETHERNET – _ Module 1.1) by right clicking on ETHERNET-MODULE V680S. Check that the Status is Running and that there are no faults in the module.