1.0 I guess OPC-UA server of Ignition stores the PLC tags in a seperate name space, but how does this update? Is it thru Ignition OPC-UA acting as a client and subscribing to tags on PLC OPC server? Or there are PLC drivers which directly update their values from PLC to Ignition OPC server?
2.0 Are the OPC UA Tags corrosponding to PLC name space(s) always exposed to a third party OPC-UA client ? Or they have to be explicitly exposed from Ignition?
3.0 Can a third party OPC-UA Client directly access OPC server on PLCs (perhaps it may depend upon the access rights give to the client logged in as).
Will appreciate some light on this.