I noticed something yesterday on RSLinx
Using the Ethernet devices driver a SLC 5/05 1747-L552 C/8 DC 2.59 says its faulted.
Looking at the same device using Eth I/P driver says its OK.
A similar device next to it, a SLC 5/05 1747-L551/C C/11 DC 3.46, does not do the same thing. Its fine on both ETH and ETH I/P . And both machines are working just fine.
Looks that way right this minute in fact.