IEC 62541-8:2020 RLV
OPC Unified Architecture - Part 8: Data Access
The complete address space model, including all NodeClasses and Attributes is specified in IEC 62541-3. The services to detect and access data are specified in IEC 62541-4.
This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) added new VariableTypes for AnalogItems;
b) added an Annex that specifies a recommended mapping of OPC UA Dataccess to OPC COM DataAccess;
c) changed the ambiguous description of "Bad_NotConnected";
d) updated description for EUInformation to refer to latest revision of UNCEFACT units.
|Publication type||International Standard|
|TC/SC||TC 65/SC 65E - Devices and integration in enterprise systemsrss|
|ICS||25.040.40 - Industrial process measurement and control|
35.100.05 - Multilayer applications
|File size||3219 KB|
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