Can this be used to connect to OPC DA (Classic) server?

convertersystems / opc-ua-client

Visualize and control your enterprise using OPC Unified Architecture (OPC UA) and Visual Studio.

MIT License

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Can this be used to connect to OPC DA (Classic) server? #71

Closed RaymondGemalto closed 5 years ago

RaymondGemalto commented 5 years ago

Are OPC UA backward compatible with OPC DA; I.e. The Class OPC DA server?

awcullen commented 5 years ago

You would need an OPC UA Server in the middle. The OPC Foundation provides COM UA Wrapper, an OPC UA Server that wraps an OPC DA Server and with that enables an OPC UA Client to access information from the DA Server. Further, there are commercial solutions that provide a gateway (wrapper and proxy together) such as https://www.unified-automation.com/products/wrapper-and-proxy/uagateway.html.
Another solution also includes a tunneler, see https://www.matrikonopc.com/opc-ua/products/opc-ua-tunneller.aspx

RaymondGemalto commented 5 years ago

Actually, my requirement is very simple; access OPC DA (classic) server and provide these data to somewhere else. Don't need OPC UA nor OPC UA Server. I read OPC UA Client can be used to read OPC DA (Classic) data too. But I can't find the right document without paying for commercial SDK.

That's why I'm hoping this project can provide me with that tool to access OPC DA directly.

awcullen commented 5 years ago

OPC UA clients can not read DA servers directly. There must be a wrapper/gateway in between.