I had tried swapping pins 2 and 3 at the HMI with no result.
I am not sure that the Eaton HMi06CE can communicate, other than it's setup allows the selection of "EasyPLC800/MFD (Easycom). Default communications are then RS232; 8,1,none; 19.2k, COM1. I have also tried 9.6k. The COM1 on the HMI seems to work, as it can also be used to download programs to the HMI. Attached are screenshots . There is a default password of 12345678, which I will remove and try again.
However, whether the HMi06CE really can communicate with the EASY800, I do not know. The HMI manual itself does not mention it; Eaton have not replied to queries I have sent them over 1 week ago. The local Moeller reps do not know.
I do wonder if the EASY800-MO-CAB is worth a try.
I also wonder if the the HMI is meant to be plugged into the Titan-MFD display; this would not make much sense to me, as there would then be 2 HMI's.
Thanks for your time.
John