Good afternoon Mike,

Two Micro800's can communicate with each other, however I don't have a lesson on that yet, but check out the below manual to see if it helps?
– https://literature.rockwellautomation.com/idc/groups/literature/documents/qs/2080-qs002_-en-e.pdf

Hope this helps,

Shawn Tierney,
Instructor at The Automation School