WinCC connection to a MARK 5 system.

WinCC is both an OPC Server and an OPC client.  Therefore as long as the Mark5 system supports OPC you should have no issue communicating.

Alternatively you may be able to use SQL scripts to interact between the two systems.

Failing that you can probably use file exchanges.

I have never used the Mark 5 system so I am unfamiliar with the interfaces it supports.  However WinCC itself is very open and I have yet to find a system it cannot communicate with, one way or the other.

Hope this helps,
Salma