At first: Sorry of not answering, I don't know what happened here.
Secondly: Is the question still a question, or did you find the right answers in the meantime?
If not, then just some words: Yes, the MTX supports an OPC UA server at the controls for years! MLPI belongs only to the MLC.
It also exist a documentation what includes all information how to establish a OPC UA connection and how to get the data and the prerequisites to get PLC data in particular (symbol data ...).
In case you need some more information related to your application, please send me a private message here. Give some information about your hard/software and "goal to achieve" too, please.
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