If you press the button at OPC Server Register dialog box, Server Browse dialog box will come up like <Figure 1>.
<Figure 1> Server Browse dialog box for searching OPC Server
<Figure 1> shows an OPC Server (2.x~3.0 version) which is registered at current computer.
Notice) If there isn't registered OPC Server or OPCEnum isn't installed, OPC Server will not be displayed at <Figure 1>.
In this case, you have to register the OPC Server or Setup(Register) the OPCEnum.
Reference) AUTOBASE OPC Server Register
Relate items)