Expression/Calculation in OPC Item Path (Need Help)

Got 2 questions here:

  1. How can i change the OPC Path the be a tag variable?
    Specifically a HMI variable, so that if its changed it applies to everywhere in the project

  2. How can I set a expression or equiation in the OPC item path?
    A few things ive tried:
    [WTP]HR{BASEADDRESS + 2}
    [WTP]HR{BASEADDRESS}+2
    [WTP]HR({BASEADDRESS} + 2)
    etc.
    Or is there anyway to reference the OPC path through an expression tag to accomplish this?

Well firstly, you’re not going to be able to use a client tag, as these are client scoped and tags are gateway scoped. I haven’t tried what you’re attempting, but interested to see what others come back with!