How to read/write a word bit with OPC UA

OPC UA does not allow the user to access a bit of a word directly.  The OPC UA specification (OPC 10000-3 - UA Specification Part 3 - Address Space Model 1.05.01) does not specify this as a standard data type.

As a workaround, use a located variable to a word bit address (i.e., %MW500.12, etc.)

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