Chapter 3. Installation and Start-up: Rack-based and RX7i Embedded InterfaceGFK-2224Q January 2017 31Determining if an IP Address is Already Being UsedNote: This method does not guarantee that an IP address is not duplicated. It will not detect adevice that is configured with the same IP address if it is temporarily off the network.It is very important not to duplicate IP addresses. To determine if another node on the network is using the sameIP address:1. Disconnect your Ethernet Interface from the LAN.2. Ping the disconnected Interface’s IP address. If you get an answer to the ping, the chosen IP address isalready in use by another node. You must correct this situation by assigning unique IP addresses.3.7 Ethernet Plug-in ApplicationsEthernet interface versions 3.6 and later support the use of additional firmware images called Ethernet plug-inapplications, which may implement additional communication protocols. Up to three Ethernet plug-inapplications can be loaded into the Ethernet interface along with the Ethernet firmware via the WinLoaderutility. Each plug-in application is identified by a number (1-3). Once loaded, each Ethernet plug-in applicationis stored in non-volatile memory where it is preserved until it is overwritten by WinLoading another Ethernetplug-in application with the same number, or it is explicitly deleted via the pluginapp Station Managercommand (see TCP/IP Ethernet Communications for PACSystems Station Manager Manual, GFK-2225).All Ethernet plug-in applications are started during normal Ethernet power-up or restart. Duringtroubleshooting, the Ethernet Restart pushbutton may be used to startup the Ethernet interface without theplug-in applications (see “Ethernet Restart Pushbutton”).The functional operation, PLC interfaces, and Station Manager support for each Ethernet plug-in applicationare supplied separately from this user manual.