OPC Surrogate in Compact HMI
Does Compact HMI have OPC Surrogate for third party OPC Client connection similar to 800xA?
If not, what is the best way to communicate with a 3rd party OPC Client (i.e. 3rd party HMI)?
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Yes, as far as I know the CHMI offers the same as feature set in terms of OPC DA connectivity as System 800xA.
The OPC DA Surrogate is only needed when the client is remote and have to use DCOM to connect.
If the client is running locally on a CHMI node, the OPC DA Server is also a possibility.
The OPC DA Server bring less overhead than the OPC DA Surrogate because it run in-process compared to the OPC DA Surrogate which always run out-of-process.
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