Rockwell Automation 1784-PCD DeviceNet Communication Card - Manual (Page 75)

Run the 1784-PCD Test Utility and Access Diagnostics 9-5
Publication 1784-IN029C-EN-P - June 2001
If you are properly connected to your network, the test utility will browse your
network to find active nodes. You will see a node table with the active nodes
checked:
TIP
If you get an error message telling you the 1784-PCD card
does not appear to be connected to a network, check or
replace your network cabling.