how can i know the number of opc servers in my system
If you are looking for OPC servers already connected to your 800xA system then the answer by inrad2 of looking below the OPCDA Connector will give you that info.
But, if you want to know all available OPC server on your nodes you can run a 3rd party opc browser like MobileOpExplorer.exe from Matrikon, then go to
SERVER // ADD/CONNECT SERVER and add the nodes one by one, you will see the names of the OPC servers below each node, doesn't matter if you are already using them or not in the ABB system.
When talking about OPC DA servers, the service structure will list all configured OPC server when you expand the OPC DA Connector service.
However, a system may contain more OPC servers that have not yet been configured to be used by 800xA.
There is no central tool that can automatically iterade nodes, list & report OPC servers for you; you need to manually iterate all computers with an OPC DA Client, e.g. the "advdsopcclient.exe" which is shipped with 800xA.
Select a remote computer and then browse it.
i'm sure that the first one for acknowledge manager KM but the other four i don't know for what, how can i know