标准摘要
[中文适用范围]： IEC 62541-5:2026 本标准是第四版，取代了2020年发布的第三版，属于技术性修订。相比上一版，主要技术变更包括：a) 附录B已删除，其内容用于编制IEC 62451-16；b) 附录C已删除，其内容用于编制IEC 62451-20；c) 新增货币信息模型；d) 新增接口与插件的信息模型；e) 新增方法元数据的信息模型；f) 在能力项中新增MaxSessions（最大会话数）、MaxSubscriptions（最大订阅数）和MaxMonitoredItems（最大监控项数）；g) 新增有序对象列表的信息模型；h) 新增PortableQualifiedName和PortableNodeId数据类型；i) 新增UriString数据类型；j) 新增SemanticVersionString数据类型；k) 新增AssociatedWith参考类型；l) 在NamespaceMetadataType中新增ConfigurationVersion属性；m) 新增AuditClientEventType和AuditClientUpdateMethodResultEventType事件类型；n) 在NamespaceMetadataType中新增ModelVersion；o) 新增NoTransparentBackupRedundancyType，以支持主/备应用场景；p) 新增BitFieldType和BitFieldDefinitionType数据类型。 [外文原描述]： IEC 62541-5:2026 This edition includes the following significant technical changes with respect to the previous edition: a) Annex B has been removed and used to create IEC 62451-16; b) Annex C has been removed and used to create IEC 62451-20; c) currency information model has been added; d) information model for Interfaces and AddIns has been added; e) information model for Method Metadata has been added; f) MaxSessions, MaxSubscriptions, and MaxMonitoredItems have been added to capabilities; g) information model for ordered list of objects has been added; h) PortableQualifiedName and PortableNodeId DataTypes have been added; i) UriString DataType has been added; j) SemanticVersionString DataType has been added; k) AssociatedWith Reference Type has been added; l) ConfigurationVersion Property has been added to NamespaceMetadataType; m) AuditClientEventType and AuditClientUpdateMethodResultEventType have been added; n) ModelVersion has been added to NamespaceMetadataType; o) NoTransparentBackupRedundancyType has been added to support a Primary/Standby use case; p) BitFieldType and BitFieldDefinitionType have been added. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
英文名称OPC unified architecture - Part 5: Information Model