From the multi-client perspective, a redundant pair of servers is only a single server and is also only treated as such.
There is only one server package for the redundant pair of servers and, thus, only one server prefix. The multi-client then retrieves the relevant tags from the physical server to which it is currently connected, in other words from the master if there is no preferred server configured.
Open the pop-up menu of the "Server data" editor in the WinCC Explorer. The packages available on that computer are displayed in the data window. The symbolic package name in the "Name" column is also the server prefix.
You can also determine the name of the server prefix as described below.
- Create an IO field in the Graphics Designer and connect this to a tag of the desired server over the IO field configuration dialog. The server prefix is then set automatically in front of the tag.
- By double-clicking the "Server prefix" attribute (of a screen window, for example) you get a selection list of all the servers displayed.
The requirement for this is that the server data is created and downloaded on the client.