Check the latest TIA Portal (V19) documentation and available instructions.  Be sure your PLC has the latest firmware installed and the project PLC(s) are configured with that firmware revision (or higher - for future readers). 

AutoGen_2832099

Is it possible to resolve e.g. int Values into their named value? 

Its a nice feature but it would be nicer  when it can work also in the other way.

• You can see the values monitoring the variables inside a DB or FB, in a Watch / Force table.
• If you let a block parameter (i.e. input / output) empty, you can just see the numerical values online.
• To see texts instead numbers choose the representation mode “Symbolic”.
• In the online monitoring / Watch table, by modify, you can just enter numerical values even if “Symbolic” representation mode was selected, but as soon as you type a numeric value, this value is converted to the Text value.

• Named value data types can be used as types in global libraries and project libraries.
• If you change the namespace of a software unit, you can now apply the change to
• underlying named value data types.
• The use of named value types in safety programs is possible.
• It is now also possible to load individual
• named value data types from the device or from the memory card to the offline project.
• You can now use named value data types in the textual block interface of an SCL block.

You can also find tips about Named Value data types in How do you use "Named value data types" in TIA Portal V20? 

The open project exceeded 8M, so I split the project in two parts and zip it in different files.

part 1

Part 2 here

Unzip both part1 and part2 at the same folder to get the original project.