Rockwell Automation Publication 193-UM015D-EN-P - February 2015 381
EtherNet/IP Communications Chapter 9
For EtherNet/IP Communication Modules with firmware v1.004 and higher, the
default password is the serial number of the E300 EtherNet/IP Communication
Module which can be found on the home page of the E300 web server.
It is recommended that you change the password for user name Administrator to
deter any malicious activity through the E300 EtherNet/IP Communication
Module’s web server. The password can be change on the password
configuration web page.