HMI     : IPC with Zenon 6.51 SP0
PLC     : PacDrive C600
Client  : Third Party Software

I am new to the Zenon OPC server configuration, i would like to ask,

For OPC DA configuration,

                   1. Which Tunnel software to be used for communicate between Server and Client (Please mention, which is free on licensed).
                   2. Can anyone please share complete manual/documents related to how we configure OPC DA server with Tunnel Software in Zenon.
                   3. By using OPC DA is it possible to transfer alarm to client.?