Hello

I have a WinCC Unified Project (V20 Upd3)

Here the user can establish connection to a non-Siemens PLC and read some tags that are visualized on the WinCC Unified screens.

As the connection to 3. party PLC's cannot be done over WinCC Unified directly, I have written a C# script that is connected to my project with ODK interface.

My C# code is doing the connection to PLC , reading its values without problem, and then sending back them to my WinCC Unified RT with TagWrite function.

In general it is working fine, but:

Each different user (web client) can select a different PLC to connect , and as result, the ODK C# script can be triggered in parallel several times. How can I write back the data to WinCC Unified user- or session specific, so that each user gets the correct data related to the choosen PLC?

When I write from C# scipt to internal tags like PLC_Value_1, PLC_Value_2,PLC_Value_3...., how can I configure this internal tags user or session specific so that each user gets the correct values back?