That is a bit of an open ended question.
WR11 is going to get an address from the cell provider
wr11 is going to give an address to what ever is attached to the ethernet port
what ever is attached to the ethernet port will be able to connect to the cell providers network/internet(dependant on plan) through the wr11 not sure why the wr11 is going to talk to the plc controller.
you need to be more specific on what you are trying to do