I have AD2USB connected and can control the alarm from the panel with the IU5 and get status. I have plugin version 2.45. Added at cheat sheet my zones and can see each, but status is not accurate, ie, IU 5 zone panel status shows not ready, should show red on open zones but all 9 zones are green. TTL default was set to 60 in an attempt to get more real time status (plenty of time to cycle 9 zones).
Try posting in the forum for the plugin if you haven’t already.
http://forum.micasaverde.com/index.php/topic,7266.msg83458.html#msg83458