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Scope: Core (OPC-10000-*) All specs

12 result(s) for Instance

OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.3.3.2 Fully-inherited InstanceDeclarationHierarchy

Fully-inherited InstanceDeclarationHierarchy An instance of a TypeDefinitionNode is described by the fully-inherited InstanceDeclarationHierarchy of the TypeDefinitionNode . The fully-inherited InstanceDeclarationHierarchy can be created by starting with the InstanceDeclarationHierarchy ... BaseDataVariableType Multiple BrowsePaths to the same Node shall be treated as separate Nodes . An Instance may provide different Nodes for each BrowsePath . The fully-inherited InstanceDeclarationHierarchy for "BetaType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.4.1 Overview

Overview Any Instance of a TypeDefinitionNode will be the root of a hierarchy which mirrors the InstanceDeclarationHierarchy for the TypeDefinitionNode. Each Node in the hierarchy of the Instance will have
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.4.2 Creating an Instance

Creating an Instance Instances inherit the initial values for the Attributes that they have in common with the TypeDefinitionNode from which they are instantiated, with the exceptions of the NodeClass ... NodeId . When a Server creates an instance of a TypeDefinitionNode it shall create the same hierarchy of Node s beneath the new Object or Variable depending on the ModellingRule
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

6.2.2 Application Instance Certificate

Application Instance Certificate An Application Instance Certificate is a ByteString containing the DER encoded form (see X.690 ) of an X.509 v3 Certificate . This Certificate is issued by certifying authority ... identifies an instance of an application running on a single host. The X.509 v3 fields contained in an Application Instance Certificate are described in Table 50 . The fields are defined
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

6.7.2.3 Security Header

values are invalid. SenderCertificate Byte [] The X.509 v3 Certificate assigned to the sending application Instance . This is a DER encoded blob. The structure of an X.509 v3 Certificate is defined ... ReceiverCertificateThumbprint Byte [] The thumbprint of the X.509 v3 Certificate assigned to the receiving application Instance . The thumbprint is the SHA1 hash of the DER encoded form of the Certificate . When
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

6.5.1 HasEngineeringUnitDetails

link a Variable with EUInformation DataType to its more detailed AddressSpace representation Instance of the ServerUnitType ObjectType . The SourceNode of References of this type shall be a Variable with EUInformation ... DataType . The TargetNode of this ReferenceType shall be an Instance of the ServerUnitType ObjectType . The Reference has to change if the value (the concrete EngineeringUnit ) is changing. Clients can subscribe
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

6.5.2 HasQuantity

semantics of this ReferenceType is to link a Variable with EUInformation DataType to an Instance of the QuantityType ObjectType . The SourceNode of References of this type shall be a Variable ... EUInformation DataType (typically the EngineeringUnits Property) . The TargetNode of this ReferenceType shall be an Instance of the QuantityType ObjectType . The HasQuantity is formally defined in Table 50 . Table 50 - HasQuantity
OPC-10000-82 – OPC Unified Architecture - Part 82: UAFX Networking

7.4.2.1 Overview

ClockTarget depends on the IEEE Std 802.1AS defined role for synchronisation. Each instance of ClockSource or ClockTarget is bound to one PTP Instance . The number and type ... presence of a Bridge Component . A UAFX Station can host more than one PTP Instance , e.g., UAFX Stations 1 and 2. A Grandmaster PTP Instance can reside on any grandmaster
OPC-10000-82 – OPC Unified Architecture - Part 82: UAFX Networking

7.4.2.1.1 gPTP domains

scope of gPTP message communication, state, operations, parameters, and timescale. The Grandmaster PTP Instance is the root of a gPTP domain. UAFX supports the following two types of gPTP domains
OPC-10000-82 – OPC Unified Architecture - Part 82: UAFX Networking

7.4.2.1.2 PTP Instances

There are two types of PTP Instances used in a gPTP domain: PTP End Instance PTP Relay Instance A PTP Instance operates in a single Bridge Component or End Station ... within exactly one gPTP domain. A UAFX Station can contain more than one PTP Instance in the same gPTP domain
OPC-10000-82 – OPC Unified Architecture - Part 82: UAFX Networking

7.4.2.1.4 Examples of PTP in a UAFX Station

support one or more gPTP domains. Each gPTP domain is represented by a PTP Instance, which can have an associated ClockSource or ClockTarget . A PTP Instance with an associated ClockSource ... Grandmaster PTP Instance . A ClockSource and ClockTarget can serve as a provider of time for a UAFX Application (e.g., sequence of events). Figure 20 shows an example of a UAFX
OPC-10000-82 – OPC Unified Architecture - Part 82: UAFX Networking

7.4.2.1.5 Engineered time synchronisation spanning tree

configuration instead of BMCA to construct a desired sync tree with the Grandmaster PTP Instance as the root (see IEEE Std 802.1AS‑2020 , 10.3.1). One of the advantages ... Working Clock is a use case of the engineered sync tree. The Grandmaster PTP Instance resides in a dedicated Grandmaster -capable IA-station . An external sync tree management entity should