Communication Issue for AXBB-E Ethernet Controller

[m_c]

I can ping the AXBB-E without issue.

Just to clarify, can you still ping the AXBB-E after the problem happens?

5. checked that DC power supply V0 is distinct from AC GRND.

Which DC power supply?
The control DC power 0V should be tied to GND to avoid floating voltages, although most control boxes will usually have some component that ties it to GND anyway.

Regardless, ethernet itself is fully isolated, so voltage mismatches shouldn't directly affect it.

Have you tried power cycling the AXBB-E, instead of the computer?

As has been suggested, I'd try a different computer, as that will at least eliminate one possibility.
If you've not got access to another computer, try creating a new power profile, with all power saving options turned off. On laptops, some power saving features can appear to do strange things.



For reference, Wake on Magic Packet, is just Wake On LAN. Shouldn't make any difference to how the ethernet port functions with the computer on.