If successful, verify the terminal's Network Connections and the Network Adapter settings (No DHCP and obviously a configured Static IP Address); also verify the CompactLogix Ethernet Port (module) for Static IP Addressing, address which is compatible with the terminal's one (identical first three octets).
Hopefully there is no "managed" switching and/or IT "supervised" routing which became unfunctional at the time of the power failure.
If nothing obvious, try re-downloading the tested .mer file, this time with the "Replace Communications" options checked; this might do it.