Open the Epson Net Config application. Wait or hit the refresh button until the printer and its IP address appear. Highlight the printer and press Configuration.



This will load a window with the printer configuration settings. On the right hand side to switch through menus select the Basic option under TCP/IP.  From here change the Method for Specifying IP Address from Automatic to Manual. If the printer is already set up on the network it will auto fill the IP address that the printer is already using. Once you make this change press Transmit at the bottom to send the changes to the printer. Once this change is made the printer will always have this IP address until changed or reset to factory settings.