How can I find my Robots IP Address? Does the UR even have its own IP Address? I went to About.. and it said 000.000.00.00.

Have you set up the IP address, by default it’s turned off. Depending on CB3 or e-series the path to the network setting is different. On CB3 on the main screen go to Setup robot and then network settings. On the e-series clock on the “hamburger” on the top right and then go to settings. Network is under system settings. 

The robot can use either DHCP or static IP addresses. 

It is an E-series and no I haven't set up the IP address. I don't really know much about IP addresses. Not sure if there is a set one or if you make one up and what the stipulations are to set up an IP address. I'm trying to hook up a pneumatic cylinder to my Modbus. And the information on Universal robot support page is super confusing to me. 

You need to assign up addresses to both the robot and the cylinder. Generally you are using a router and you will have to follow the routers up address structure. If you connect them directly together you could set the up address of the robot to 192.168.1.2 and the cylinder to 192.168.1.3 and then on the modbus client screen you will need to connect to modbus client at 192.168.1.3. 

You will probably need a computer to set the IP address on the cylinder or it may be done with dip switches. Your distributor or dealer should be able to help you get this system connected.