IEC 62541-12:2025
OPC unified architecture - Part 12: Discovery and global services
OVERVIEW
IEC 62541-12:2025 specifies how OPC Unified Architecture (OPC UA) Clients and Servers interact with DiscoveryServers when used in different scenarios. It specifies the requirements for the LocalDiscoveryServer, LocalDiscoveryServer-ME and GlobalDiscoveryServer. It also defines information models for Certificate management, KeyCredential management and AuthorizationServices.
Annex A informatively discusses deployment and configuration aspects.
Annex B defines NodeSet and numeric NodeIds.
Annex F provides installation rules for the LDS.
Annex H compares the Certificate management defined in this document with IETF RFC 7030.
This second edition cancels and replaces the first edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of a "Quantity Model" which can be referenced from EngineeringUnit Properties. The model defines quantities and assigned units. In addition it provides alternative units and the conversion to them;
b) addition of rules for ValuePrecision Property:
• can also be used for other subtypes like Duration and Decimal.
• additional rules when ValuePrecision has negative values.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2025 |
| No. of Pages | 142 |
| ICS Classification | 25.040.40 Industrial process measurement and control |
| Committee | TC 65/SC 65E |
| Available for Purchase | For sale in Singapore only |
| Adoption | IEC : 0 |