It's funny this post came up at all as I had just received the pdf last week from our electrical designer for a job I'm just beginning. I understand what you're asking for now and the fault codes might be a cool thing to have displayed on the SCADA system and logged into history. I'm sure the EMCP has a history within itself but as of now, don't know where it is.
I'm slammed the rest of this week (that's a good thing) but I'll take a quick look in the morning. This could be beneficial for both of us. Not sure what processor you're using but like you, I'll be bringing it in Modbus over TCP/IP as well as the ATS.