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Nope, you install an OLE control on the system that wants to communicate, then tell the SCADA/etc application to use it, and the control talks vendor-specific p
by p_l 3y ago
Nope, you install an OLE control on the system that wants to communicate, then tell the SCADA/etc application to use it, and the control talks vendor-specific protocol.
Newer OPC-UA capable devices could arguably run like that (definitely enough power, even without going for the ones that have full Linux system with Docker), but those tend to run OPC-UA instead which is way more capable and interoperable.
- mike_hearn 3y agoHuh, I wonder what this sort of thing is about then: https://www.matrikonopc.com/dcom-configuration-opc.aspx https://www.matrikonopc.com/dcom-configuration-opc.aspx
- p_l 3y agoIt's essentially a proprietary proxy + tunnel - on the client, you install their COM object as OPC service, then it goes over tunnel to a server process which talks to actual vendor OPC DCOM library using local COM. Understandable when configuring security can be a big PITA.