Rockwell Automation 1787-GEN2SKIT, -2, -3, -4, -5, -6, -7 DeviceNet Starter Kit User Manual - Manual (Page 75)

Publication DNET-UM003A-EN-P - August 2000
Connect Devices and Commission Nodes 3-23
8. Click to browse the network.
You see the CompactBlock I/O at node 02.
9. Save your network file.
When you are node commissioning, you may see a copy of a
device with a red X in either RSLinx or RSNetworx. This simply
means that RSLinx and RSNetworx can no longer find the device at
node address 63. You need to tell RSLinx not to look for that device
at node address 63. This “error” will continue to appear until you go
to RSLinx and delete the red X copy of the device from the list.
TIP
If your nodes are not in order, press F5 to refresh the
window.