WinCC MP270B

I have a question for the scripting specialists...

We use 1 panel to connect to 3 MPI masters, only one connection can be made, we use the 'change connection' functionallity.

But,

When we start on monday, the Mixer starts with a connection on adress 4. When that master is not aviable, the panel doesn't conncet to anything. Then u need to choose Mixer A, B or C.

What I need is: on startup: the panel checks what's online, if A is not online, then connect to B automatically. After startup u can change the connection if necessary...

Is there something possible with a script ?

There is a sample project for checking the online connection. I think I mentioned it to you some time ago.
Maybe you could combine that with some more scripting to achieve what you want.

That said, I think it is a really difficult job. The main problem is that you dont have any timers in the panels, and you will need timers to trigger the changeover (if no connection for a set time, then activate the script to switch connection).
Also bear in mind that there is a limit to how much scripting the panels can do.

I suggest that you use the previously mentioned script to detect if the online connection is lost. And if that is the case, prominently flash an alarm message on the screen to alert the operator to come and switch connections.