What are the key features offered by OPC UA?

In comparison with the old OPC DA standard, OPC UA brings decisive advantages:
- No more dependence on DCOM and the problems associated with this
(configuration problems, weak security, no chance to configure timeouts, no Windows bondage)
- Redundancy on both client and server side
- Linux support
- Also works beyond the computer boundaries => Internet
- New topology of the OPC data model => object oriented approach
=> object oriented data types in PVSS can be replicated on object oriented OPC nodes => clearer data structure when accessed by a OPC client.
- Flexible scaling opportunity
- Priority data queries