@HmiGuide , you assume correctly. I apologise for my typo in the OP (I didn't copy from live code), but my actual code is size-matched. I have tried WORD and 16-bit structures; DWORD and 32-bit structures; WORD and INT (just to check it wasnt my bit structures), none of this works. I should add though, @CodeShepherd , this is an MLC75 running IW14v22 rather than a CtrlX processor. And although I originally brought this up in a WebIQ forum, it seems even the UA-Client cannot read this data. So it suggests the issue lies in MLC/IW platform, perhaps the OPCUA server.
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