How To Read And Write An IP Address To An Allen Bradley 1794-AENT Flex I/O Module
You can discover the IP address of an Allen Bradley 1794-AENT Flex I/O module using the PLC Tools SIM-IPE
You can either plug the PLC Tools SIM-IPE directly into the module's Ethernet port or plug into a spare port on the Ethernet switch that the 1794-AENT is connected to and verify you have the correct device by checking it's MAC address.