If would like to set an IP address you need to download the IP setting tool, http://bematechus.com/support/product-drivers/ , in our site.  Please follow these steps;

1. For initial communication you need to use the USB cable
2. Run IP tool setting 
3. Click Refresh, printer should show the current IP in its settings
4. Insert desire IP address on IP
5. Click  Set IP

6. After the desired IP is set connect the Ethernet Cat. 5 cable, remove the USB and perform a test printing