58 Rockwell Automation Publication ENET-UM004B-EN-P - November 2015
Chapter 6   Module Diagnostics
Port Configuration Category
If communication with the adapter has failed, click Refresh communication to 
try to restart communication with the module.
Port Diagnostics 
On the Port Configuration category, click the Port Diagnostics button to view 
information for the port. See 
Table 4 on page 59 for parameter descriptions.