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05/25/2021
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Dear Team,
I am new to OPC UA and tried building OPC server from the github basic code.
I want to know how can the OPC server be classified as OPC DA ( data access ) or OPC A&E or OPC HDA while coding.
with thanks and regards;
Rajesh
05/30/2017
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OPC DA/OPC AE/OPC HDA are terms used to describe applications that conform to the DCOM based OPCClassic specifications.
OPC UA is called “Unified Architecture” because it eliminates the distinctions between a DA/AE/HDA application. Its a single application that can have all of those capabilities.
The code in GitHub is OPC UA code.
05/25/2021
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Dear Randy,
Thanks for the quick response. Does this means that there technically (in code) there is nor difference among the OPC DA/OPC AE/OPC HDA
It is the functionality of the server which defines the Server type . i.e. Data Access , Alarms & Event and Historical Data Access.
Please confirm.
Best regards;
Rajesh
05/30/2017
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There are difference code paths that need to be implemented for different features, however, there is no distinction between a DA/AE/HDA server in OPC UA. he equivalent of an AE server would be a OPC UA that implements one or more of the AC profiles.
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