Search

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

120 result(s) for VariableType

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

3.1.18 VariableType

VariableType Node that represents the type definition for a Variable
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

3.1.17 TypeDefinitionNode

used to define the type of another Node Note 1 to entry: ObjectType and VariableType Nodes are TypeDefinitionNodes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

4.6.1 General

common setpoint definition that can be used by other Objects , a specialised VariableType is used. Each setpoint DataVariable that uses this common definition will have a HasTypeDefinition Reference that identifies ... common "SetPoint" VariableType . Figure 5 - Example of a Variable defined by a VariableType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

4.6.2 Complex TypeDefinitionNodes and their InstanceDeclarations

function block, has a HasComponent Reference to a Variable "SP" of the VariableType "SetPoint". "AI_BLK_TYPE" could have an additional setpoint Variable
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

4.6.3 Subtyping

characteristics. For example, a vendor may wish to extend a general "TemperatureSensor" VariableType by adding a Property providing the next maintenance interval. The vendor would do this ... creating a new VariableType which is a TargetNode for a HasSubtype reference from the original VariableType and adding the new Property
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.2 Variable NodeClass

definition and therefore be the SourceNode of exactly one HasTypeDefinition Reference pointing to a VariableType . See 4.6 for a description of type definitions. <other References> 0..* Data Variables
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.3 Properties

SourceNode of any NonHierarchical References . The HasTypeDefinition Reference points to the VariableType of the Property . Since Properties are uniquely identified by their BrowseName , all Properties shall point to the PropertyType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.4 DataVariable

least one HasComponent Reference coming from an Object , an ObjectType , a DataVariable or a VariableType . DataVariables shall not be the TargetNode of any HasProperty References . Therefore, a HasComponent Reference pointing ... Variable Node identifies it as a DataVariable . The HasTypeDefinition Reference points to the VariableType used as type definition of the DataVariable . If the DataVariable is used as InstanceDeclaration
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.5 VariableType NodeClass

VariableType NodeClass VariableTypes are used to provide type definitions for Variables . VariableTypes are defined using the VariableType NodeClass , as specified in Table 14 . Table 14 - VariableType NodeClass Name Use Data ... ValueRank M Int32 This Attribute indicates whether the Value Attribute of the VariableType is an array and how many dimensions the array has. It may have the following values
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.6 Client-side creation of Variables of an VariableType

Client-side creation of Variables of an VariableType Variables are always based on a VariableType , i.e. they have a HasTypeDefinition Reference pointing to its VariableType . Clients can create Variables using ... Variable . A Variable created by the AddNodes Service contains all components defined by its VariableType dependent on the ModellingRules specified for the components. However, the Server may add additional components
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.1 DataType Model

structure of the Value Attribute of Variables and their VariableTypes . Therefore each Variable and VariableType is pointing with its DataType Attribute to a Node of the DataType NodeClass as shown
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.2 Encoding Rules for different kinds of DataTypes

defined in the AddressSpace . Clients can read the DataType Attribute of a Variable or VariableType to identify the Simple DataType of the Value Attribute . An example of a Simple DataType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.5.2 DataTypeRefinement Objects

meta data, the EngineeringUnits is defined as Kelvin, therefore the AnalogUnitType is used as VariableType . The optional field2 is refined to "not used" by referencing the corresponding Variable
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.5.3 Usage of DataTypeRefinements

Variable . DataTypeRefinements shall not be used from any DataType Node , from any VariableType , or any InstanceDeclaration , only from concrete Variables . This does include Variables describing a DataTypeRefinement , as shown
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.6.1 Overview

Overview When a Variable or VariableType is defined, the DataType of the Value is defined by the DataType , ValueRank and ArrayDimensions Attributes . In general, it is always allowed
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.2.8 Attribute Handling of Variable and VariableTypes

Attribute Handling of Variable and VariableTypes Some restrictions exist regarding the Attributes of a VariableType or a Variable used as an InstanceDeclaration with regard to the data type ... Value Attribute . When a Variable used as InstanceDeclaration or a VariableType is overridden or instantiated the following rules apply: The DataType Attribute can only be changed to a new DataType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.4.4.4.3 ExposesItsArray

only be applied on InstanceDeclarations of NodeClass Variable that are part of a VariableType having a single- or multidimensional array as its data type. The Variable A having this ModellingRule ... shall be referenced by a forward hierarchical Reference from a VariableType B. B shall have a ValueRank value that is equal to or larger than zero. A should have
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.7 HasComponent ReferenceType

Variable , the SourceNode shall be an Object , an ObjectType , a DataVariable or a VariableType . By using the HasComponent Reference , the Variable is defined as DataVariable . If the TargetNode
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.10 HasSubtype ReferenceType

Clause 6 . The SourceNode of References of this type shall be an ObjectType , a VariableType , a DataType or a ReferenceType and the TargetNode shall be of the same NodeClass
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.13 HasTypeDefinition ReferenceType

this ReferenceType is to bind an Object or Variable to its ObjectType or VariableType , respectively . The relationships between types and instances are described in 4.6 . The SourceNode of this ReferenceType ... ObjectType ; if the SourceNode is a Variable , then the TargetNode shall be a VariableType . Each Variable and each Object shall be the SourceNode of exactly one HasTypeDefinition Reference
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.15 GeneratesEvent

Method call. The SourceNode of References of this type shall be an ObjectType , a VariableType or a Method InstanceDeclaration . The TargetNode of this ReferenceType shall be an ObjectType representing EventTypes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.22.1 Overview

HasComponent ReferenceType . The semantic of this ReferenceType is to indicate that a VariableType or Variable also exposes its Structure fields or Array elements as Variables in the information model ... SourceNode of this ReferenceType shall be a VariableType or a Variable having a Structure DataType . When the Value of the SourceNode is a scalar then the TargetNode shall
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

8.60 AttributeWriteMask

Attribute is writeable. ValueForVariableType 21 Indicates if the Value Attribute is writeable for a VariableType . It does not apply for Variables since this is handled by the AccessLevel and UserAccessLevel
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

9.32.1 General

adding or deleting a Node or Reference. Although the relationship of a Variable or VariableType to its DataType is not modelled using References , changes to the DataType Attribute ... Variable or VariableType are also considered as model changes and therefore a ModelChangeEvent is generated if the DataType Attribute changes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

A.4.1 General

having the same semantic (e.g. set point). It is not necessary to define a VariableType that only reflects the DataType of a Variable , e.g. an "Int32VariableType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

A.4.2 Properties or DataVariables

always have the same BrowseName . The same semantic of DataVariables is captured in the VariableType . If it is not clear which concept to use based on the semantic described
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

B.3.6 Variable and VariableType

B.3.6 Variable and VariableType Variable and VariableType are shown in Figure B.10 . Figure B.10 - Variable and VariableType The DataType of a Variable shall be the same as or a subtype ... DataType of its VariableType (referred with HasTypeDefinition ). If a HasProperty points to a Variable from a Base "A" then the following constraints apply: The Variable shall
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

C.2.2 Simple notation

DisplayName of the Variable . The font shall not be set in italic. VariableType Shadowed rectangle with rounded corners including text representing the string-part of the DisplayName of the VariableType
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

C.2.3 Extended notation

HasTypeDefinition reference to point from an Object or Variable to its ObjectType or VariableType the name of the TypeDefinition can be added to the text used in the Node
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.24.1 Overview

ObjectTypeAttributes Defines the Attributes for the ObjectType NodeClass . VariableTypeAttributes Defines the Attributes for the VariableType NodeClass . ReferenceTypeAttributes Defines the Attributes for the ReferenceType NodeClass . DataTypeAttributes Defines the Attributes
OPC-10000-4 – OPC Unified Architecture - Part 4: Services

7.24.6 VariableTypeAttributes parameter

parameter. Table 155 - VariableTypeAttributes Name Type Description VariableTypeAttributes structure Defines the Attributes for the VariableType NodeClass specifiedAttributes UInt32 A bit mask that indicates which fields contain valid values. A field
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

6.3.3 ServerDiagnosticsType

entry for each sampling rate currently used by the Server . Its TypeDefinitionNode is the VariableType SamplingIntervalDiagnosticsArrayType , providing a Variable for each entry in the array, as defined ... entry for each Notification channel actually established in the Server . Its TypeDefinitionNode is the VariableType SubscriptionDiagnosticsArrayType, providing a Variable for each entry in the array as defined in 7.11 . Those
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

6.3.5 SessionDiagnosticsObjectType

Subscription diagnostic information per opened subscription, as defined in 12.15 . Its TypeDefinitionNode is the VariableType SubscriptionDiagnosticsArrayType providing a Variable for each entry in the array, as defined in 7.11 . CurrentRoleIds
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.1 General

General Typically, the components of a complex VariableType are fixed and can be extended by subtyping. However, because each Variable of a VariableType can be extended with additional components this
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.2 BaseVariableType

BaseDataVariableType directly inherit from this type. There are no References specified for this VariableType . It is formally defined in Table 72 . Table 72 - BaseVariableType definition Attribute Value BrowseName BaseVariableType IsAbstract
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.3 PropertyType

need a specialised type definition. It is not allowed to subtype this VariableType . There are no References specified for this VariableType . It is formally defined in Table 73 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.4 BaseDataVariableType

definition whenever there is a DataVariable having no more concrete type definition available. This VariableType is the base VariableType for VariableTypes of DataVariables , and all other VariableTypes of DataVariables shall ... either directly or indirectly inherit from it. There are no References specified for this VariableType . It is formally defined in Table 74 . Table 74 - BaseDataVariableType definition Attribute Value BrowseName BaseDataVariableType
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.5 ServerVendorCapabilityType

ServerVendorCapabilityType This VariableType is an abstract type whose subtypes define capabilities of the Server . Vendors may define subtypes of this type. This VariableType is formally defined in Table 75 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.6 ServerStatusType

ServerStatusType This complex VariableType is used for information about the Server status. Its DataVariables reflect its DataType having the same semantic defined in 12.10 . The VariableType is formally defined
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.7 BuildInfoType

BuildInfoType This complex VariableType is used for information about the Server status. Its DataVariables reflect its DataType having the same semantic defined in 12.3.15.1 . The VariableType is formally defined
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.8 ServerDiagnosticsSummaryType

ServerDiagnosticsSummaryType This complex VariableType is used for diagnostic information. Its DataVariables reflect its DataType having the same semantic defined in 12.9 . The VariableType is formally defined in Table 78 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.9 SamplingIntervalDiagnosticsArrayType

SamplingIntervalDiagnosticsArrayType This complex VariableType is used for diagnostic information. For each entry of the array, instances of this type will provide a Variable of the SamplingIntervalDiagnosticsType VariableType having the sampling ... rate as BrowseName . The VariableType is formally defined in Table 79 . Table 79 - SamplingIntervalDiagnosticsArrayType definition Attribute Value BrowseName SamplingIntervalDiagnosticsArrayType IsAbstract False ValueRank 1 (1 = OneDimension) ArrayDimensions {0} (0 = UnknownSize) DataType
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.10 SamplingIntervalDiagnosticsType

SamplingIntervalDiagnosticsType This complex VariableType is used for diagnostic information. Its DataVariables reflect its DataType , having the same semantic defined in 12.8 . The VariableType is formally defined in Table 80 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.11 SubscriptionDiagnosticsArrayType

SubscriptionDiagnosticsArrayType This complex VariableType is used for diagnostic information. For each entry of the array, instances of this type will provide a Variable of the SubscriptionDiagnosticsType VariableType having the SubscriptionId ... BrowseName . The VariableType is formally defined in Table 81 . Table 81 - SubscriptionDiagnosticsArrayType definition Attribute Value BrowseName SubscriptionDiagnosticsArrayType IsAbstract False ValueRank 1 (1 = OneDimension) ArrayDimensions {0} (0 = UnknownSize) DataType SubscriptionDiagnosticsDataType References
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.12 SubscriptionDiagnosticsType

SubscriptionDiagnosticsType This complex VariableType is used for diagnostic information. Its DataVariables reflect its DataType , having the same semantic defined in 12.15 . The VariableType is formally defined in Table 82 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.13 SessionDiagnosticsArrayType

SessionDiagnosticsArrayType This complex VariableType is used for diagnostic information. For each entry of the array instances of this type will provide a Variable of the SessionDiagnosticsVariableType VariableType , having the SessionDiagnostics ... also be referenced by the SessionDiagnostics Objects defined by their type in 6.3.5 . The VariableType is formally defined in Table 83 . Table 83 - SessionDiagnosticsArrayType definition Attribute Value BrowseName SessionDiagnosticsArrayType IsAbstract
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.14 SessionDiagnosticsVariableType

SessionDiagnosticsVariableType This complex VariableType is used for diagnostic information. Its DataVariables reflect its DataType , having the same semantic defined in 12.11 . The VariableType is formally defined in Table 84 . Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.15 SessionSecurityDiagnosticsArrayType

SessionSecurityDiagnosticsArrayType This complex VariableType is used for diagnostic information. For each entry of the array instances of this type will provide a Variable of the SessionSecurityDiagnosticsType VariableType , having the SessionSecurityDiagnostics ... also be referenced by the SessionDiagnostics Objects defined by their type in 6.3.5 . The VariableType is formally defined in Table 85 . Since this information is security related, it should
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.16 SessionSecurityDiagnosticsType

SessionSecurityDiagnosticsType This complex VariableType is used for diagnostic information. Its DataVariables reflect its DataType , having the same semantic defined in 12.12 . The VariableType is formally defined in Table 86 . Since
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.17 OptionSetType

OptionSetType The OptionSetType VariableType is used to represent a bit mask. Each array element of the OptionSetValues Property contains either the human-readable representation for the corresponding bit used ... maps to the first entry in the array, etc. In addition to this VariableType , the DataType OptionSet can alternatively be used to represent a bit mask. As a guideline
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.18 SelectionListType

SelectionListType The SelectionListType VariableType is used for a Variable where the possible values are provided by a set of values. The Selections Property contains an array of values which represent ... valid values for this VariableType's value. The Selections Property may be dynamic, including changes in the length of the array. The Selections Property may also be empty indicating there
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.19 AudioVariableType

AudioVariableType The AudioVariableType VariableType defines a Multipurpose Internet Mail Extensions (MIME) media type of the AudibleSound Property . MIME types are defined by other standards such as IETF RFC 2045 , IETF ... user agent has no knowledge of the specific audio format "xyz". The VariableType is formally defined in Table 89 . Table 89 - AudioVariableType definition Attribute Value BrowseName AudioVariableType IsAbstract
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.20 RationalNumberType

RationalNumberType This complex VariableType is used for information which needs to be provided as a fraction number. It reflects the semantic of its DataType , defined in 12.22 and is formally
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.21 VectorType

VectorType This abstract VariableType is used as base to define multi-dimensional vectors. Subtypes need to define the concrete number of dimensions. It reflects the semantic of its DataType , defined ... define a unit for each dimension of the vector ( Property VectorUnit ). The VariableType is formally defined in Table 91 . Table 91 - VectorType Definition Attribute Value BrowseName VectorType IsAbstract True ValueRank
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.22 3DVectorType

3DVectorType This complex VariableType is used to represent a vector in 3D space. It reflects the semantic of its DataType, defined in 12.24 . The VariableType is formally defined in Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.23 CartesianCoordinatesType

CartesianCoordinatesType This abstract VariableType is used as base to define multi-dimensional coordinates. Subtypes need to define the concrete number of dimensions. It reflects the semantic of its DataType , defined ... Variables . Additionally, it can define a unit for the coordinates ( Property LengthUnit ). The VariableType is formally defined in Table 93 . Table 93 - CartesianCoordinatesType Definition Attribute Value BrowseName CartesianCoordinatesType IsAbstract True
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.24 3DCartesianCoordinatesType

3DCartesianCoordinatesType This complex VariableType is used for information about positions in 3D space. It reflects the semantic of its DataType , defined in 12.26 . The VariableType is formally defined in Table
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.25 OrientationType

OrientationType This abstract VariableType is used as base to define multi-dimensional orientations. Subtypes need to define the concrete number of dimensions. It reflects the semantic of its DataType , defined ... Variables . Additionally, it can define a unit for the orientation angles ( Property AngleUnit ). The VariableType is formally defined in Table 95 . Table 95 - OrientationType Definition Attribute Value BrowseName OrientationType IsAbstract
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.26 3DOrientationType

3DOrientationType This complex VariableType was incorrectly defined. It will be deprecated in the future and therefore should not be used. The OrientationType , defined in 7.25 , is intended to be subtyped ... create Types which represent any multi-dimensional orientations including 3D spaces. The VariableType is formally defined in Table 96 . Table 96 - 3DOrientationType Definition Attribute Value BrowseName 3DOrientationType IsAbstract False ValueRank
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.27 FrameType

FrameType This abstract VariableType is used for information about multi-dimensional frames. It reflects the semantic of its DataType , defined in 12.29 . Additionally, it provides information about the dynamic behaviour ... frame. The VariableType is formally defined in Table 97 . Table 97 - FrameType Definition Attribute Value BrowseName FrameType IsAbstract True ValueRank Scalar DataType Frame References NodeClass BrowseName DataType TypeDefinition Modelling Rule
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.28 3DFrameType

3DFrameType This complex VariableType is used for information about frames in 3D space. It reflects the semantic of its DataType , defined in 12.30 . It refines the DataTypes and VariableTypes ... CartesianCoordinates and Orientation to the corresponding 3D types. The VariableType is formally defined in Table 98 . Table 98 - 3DFrameType Definition Attribute Value BrowseName 3DFrameType IsAbstract False ValueRank Scalar DataType 3DFrame
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.29 BitFieldType

BitFieldType This complex VariableType is used to represent a Variable which contains one or more fields where each field is composed of one or more bits. Subtypes of this VariableType ... BitFieldType for the presence of the child DataVariable which represents the optional field. The VariableType is defined in Table 99 . Table 99 - BitFieldType definition Attribute Value BrowseName BitFieldType IsAbstract True
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

12.18 BitFieldMaskDataType

others stay the same. The BitFieldMaskDataType can be used as DataType in the OptionSetType VariableType . Its representation in the AddressSpace is defined in Table 258 . Table 258 - BitFieldMaskDataType definition Attributes
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

12.45 BitFieldDefinition

Structured DataType is used to provide the metadata for a field of a BitFieldType VariableType . The BitFieldDefinition is formally defined in Table 308 . Table 308 - BitFieldDefinition Structure Name Type Description ... Conformance Units The following example is intended to illustrate the use of the BitFieldType VariableType . In this example the MyBitFieldType , defined in Table 310 and Table 311 , consists of three
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

F.6 UAType

UAObjectType Defines an ObjectType Node as described in OPC 10000-3 . UAVariableType Defines a VariableType Node as described in OPC 10000-3 . UADataType Defines a DataType Node as described
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

F.14 Variant

F.14 Variant The Variant type specifies the value for a Variable or VariableType Node . This type is the same as the type defined in 5.3.1.17 . As a result, the functions
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.2 SemanticsChanged

values defined in this standard change. The corresponding Properties are specified individually for each VariableType . Clients that use any of these Properties should re-read them before they process
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.1 DataItemType

DataItemType This VariableType defines the general characteristics of a DataItem . All other DataItem Types derive from it. The DataItemType derives from the BaseDataVariableType and therefore shares the variable model ... defined in OPC 10000-5 ; i.e. the Properties of that type are inherited. HasSubtype VariableType BaseAnalogType Defined in 5.3.2.2 HasSubtype VariableType DiscreteItemType Defined in 5.3.3 HasSubtype VariableType ArrayItemType Defined
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.2.2 BaseAnalogType

BaseAnalogType This VariableType is the base type for analog items. All Properties are optional. Subtypes of this base type will mandate some of the Properties . The BaseAnalogType derives from ... DataItemType defined in 5.3.1 ; i.e. the Properties of that type are inherited. HasSubtype VariableType AnalogItemType Defined in 5.3.2.3 HasSubtype VariableType AnalogUnitType Defined in 5.3.2.4 HasProperty Variable InstrumentRange Range PropertyType Optional
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.2.3 AnalogItemType

AnalogItemType This VariableType requires the EURange Property . The AnalogItemType derives from the BaseAnalogType . It is formally defined in Table 3 . Table 3 - AnalogItemType definition Attribute Value BrowseName AnalogItemType IsAbstract False ... BaseAnalogType defined in 5.3.2.2 ; i.e. the Properties of that type are inherited. HasSubtype VariableType AnalogUnitRangeType Defined in 5.3.2.5 HasSubtype VariableType AnalogNumberItemType Defined in 5.3.2.6 HasProperty Variable EURange Range PropertyType Mandatory
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.2.4 AnalogUnitType

AnalogUnitType This VariableType requires the EngineeringUnits Property . The AnalogUnitType derives from the BaseAnalogType . It is formally defined in Table 4 . Table 4 - AnalogUnitType definition Attribute Value BrowseName AnalogUnitType IsAbstract False
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.2.6 AnalogNumberItemType

AnalogNumberItemType This VariableType requires the EUNumberRange Property . The AnalogNumberItemType derives from the AnalogItemType . It is formally defined in Table 6 . Table 6 - AnalogNumberItemType definition Attribute Value BrowseName AnalogNumberItemType IsAbstract False
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.3.2 TwoStateDiscreteType

TwoStateDiscreteType This VariableType defines the general characteristics of a DiscreteItem that can have two states. The TwoStateDiscreteType derives from the DiscreteItemType . It is formally defined in Table 9 . Table
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.3.3 MultiStateDiscreteType

MultiStateDiscreteType This VariableType defines the general characteristics of a DiscreteItem that can have more than two states. The MultiStateDiscreteType derives from the DiscreteItemType . It is formally defined in Table
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.3.4 MultiStateValueDiscreteType

MultiStateValueDiscreteType This VariableType defines the general characteristics of a DiscreteItem that can have more than two states and where the state values (the enumeration) do not consist of consecutive numeric
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.4.1 General

General This abstract VariableType defines the general characteristics of an ArrayItem . Values are exposed in an array but the content of the array represents a single entity like an image ... DataItemType defined in 5.3.1 ; i.e. the Properties of that type are inherited. HasSubtype VariableType YArrayItemType Defined in 5.3.4.2 HasSubtype VariableType XYArrayItemType Defined in 5.3.4.3 HasSubtype VariableType ImageItemType Defined
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.4.2 YArrayItemType

Value are defined by corresponding Properties inherited from the ArrayItemType . The DataType of this VariableType is restricted to SByte, Int16, Int32, Int64, Float, Double, ComplexNumberType and DoubleComplexNumberType . The XAxisDefinition Property
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.4.4 ImageItemType

Value are defined by corresponding Properties inherited from the ArrayItemType . The DataType of this VariableType is restricted to SByte, Int16, Int32, Int64, Float, Double, ComplexNumberType and DoubleComplexNumberType. The ArrayDimensions Attribute
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.4.5 CubeItemType

Value are defined by corresponding Properties inherited from the ArrayItemType . The DataType of this VariableType is restricted to SByte, Int16, Int32, Int64, Float, Double, ComplexNumberType and DoubleComplexNumberType . The ArrayDimensions Attribute
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.4.6 NDimensionArrayItemType

NDimensionArrayItemType This VariableType defines a generic multi-dimensional ArrayItem . This approach minimizes the number of types however it can be proved more difficult to utilize for control system interactions. NDimensionArrayItemType ... Variable AxisDefinition AxisInformation [] PropertyType Mandatory Conformance Units Data Access NDimensionArrayItemType The DataType of this VariableType is restricted to SByte, Int16, Int32, Int64, Float, Double, ComplexNumberType and DoubleComplexNumberType. AxisDefinition Property holds
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

6.5 Conditions in a VariableType

Conditions in a VariableType Use of HasCondition in a VariableType is a special use case since Variables (and VariableTypes ) are not allowed to be the source of a HasComponent Reference ... where they assign a HasComponent Reference . Figure 29 - Use of HasCondition in a VariableType
OPC-10000-10 – OPC Unified Architecture - Part 10: Programs

5.2.7 FinalResultData

when the Program has completed its Function . The ObjectType includes a HasComponent for a VariableType of each Variable that comprises the final result data
OPC-10000-10 – OPC Unified Architecture - Part 10: Programs

5.2.9 ProgramDiagnostic2Type VariableType

ProgramDiagnostic2Type VariableType This VariableType aggregates simple Variables using simple DataTypes that reflect the elements of the ProgramDiagnosticDataType structure. Its DataVariables have the same semantic as defined in in 5.2.8 . Note ... original ProgramDiagnosticType VariableType had the same flaws as the structure. To avoid collisions with existing implementations, a new version with name ProgramDiagnostic2Type has been created. The VariableType is formally defined
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.2 PubSubDiagnosticsType

Object Counters contains all diagnostics counters for the diagnostics Object . The counters use the VariableType PubSubDiagnosticsCounterType defined in 9.1.11.5 . The counter Variables of the PubSubDiagnosticsType are defined in Table ... diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The nodes in the Objects Counters and LiveValues may be activated/deactivated by the parameter DiagnosticsLevel
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.7 PubSubDiagnosticsRootType

diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsRootType are defined in Table 317 . Table 317 - LiveValues
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.8 PubSubDiagnosticsConnectionType

diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsConnectionType are defined in Table 319 . Table 319 - LiveValues
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.9 PubSubDiagnosticsWriterGroupType

Object Counters contains all diagnostics counters for the diagnostics Object . The counters use the VariableType PubSubDiagnosticsCounterType defined in 9.1.11.5 . The counter Variables of the PubSubDiagnosticsWriterGroupType are defined in Table ... diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsWriterGroupType are defined in Table 322 . Table 322 - LiveValues
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.10 PubSubDiagnosticsReaderGroupType

Object Counters contains all diagnostics counters for the diagnostics Object . The counters use the VariableType PubSubDiagnosticsCounterType defined in 9.1.11.5 . The counter Variables of the PubSubDiagnosticsReaderGroupType are defined in Table ... diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsReaderGroupType are defined in Table 325 . Table 325 - LiveValues
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.11 PubSubDiagnosticsDataSetWriterType

Object Counters contains all diagnostics counters for the diagnostics Object . The counters use the VariableType PubSubDiagnosticsCounterType defined in 9.1.11.5 . The counter Variables of the PubSubDiagnosticsDataSetWriterType are defined in Table ... diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsDataSetWriterType are defined in Table 328 . Table 328 - LiveValues
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

9.1.11.12 PubSubDiagnosticsDataSetReaderType

Object Counters contains all diagnostics counters for the diagnostics Object . The counters use the VariableType PubSubDiagnosticsCounterType defined in 9.1.11.5 . The counter Variables of the PubSubDiagnosticsDataSetReaderType are defined in Table ... diagnostics Object . If not further specified, the live values Variables use the VariableType BaseDataVariableType . The live values Variables of the PubSubDiagnosticsDataSetReaderType are defined in Table 331 . Table 331 - LiveValues
OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines

4.4.3 StateVariableType

StateVariableType The StateVariableType is the base VariableType for Variables that store the current state of a StateMachine as a human readable name. The StateVariableType is formally defined in Table ... DataType TypeDefinition Modelling Rule Subtype of the BaseDataVariableType defined in OPC 10000-5 HasSubtype VariableType FiniteStateVariableType Defined in 4.4.7 HasProperty Variable Id BaseDataType PropertyType Mandatory HasProperty Variable Name QualifiedName PropertyType
OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines

4.4.5 TransitionVariableType

TransitionVariableType The TransitionVariableType is the base VariableType for Variables that store a Transition that occurred within a StateMachine as a human readable name. The SourceTimestamp for the value specifies when ... DataType TypeDefinition Modelling Rule Subtype of the BaseDataVariableType defined in OPC 10000-5 HasSubtype VariableType FiniteTransitionVariableType Defined in 4.4.8 HasProperty Variable Id BaseDataType PropertyType Mandatory HasProperty Variable Name QualifiedName PropertyType
OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines

4.6.3 HasGuard

TransitionType or one of its subtypes. The TargetNode shall be a Variable of the VariableType GuardVariableType or one of its subtypes. The representation of the HasGuard ReferenceType in the AddressSpace
OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines

4.6.4 GuardVariableType

True" or "False" is server-specific. Subtypes of this VariableType do define concrete machine-readable semantics. The GuardVariableType is formally defined in Table 22 . Table 22 - GuardVariableType ... BrowseName DataType TypeDefinition ModellingRule Subtype of the BaseDataVariableType defined in OPC 10000-5 HasSubtype VariableType ElseGuardVariableType Defined in 4.6.6 HasSubtype VariableType ExpressionGuardVariableType Defined in 4.6.5 Conformance Units Base Info Choice
OPC-10000-19 – OPC Unified Architecture - Part 19: Dictionary Reference

7.1 MultiStateDictionaryEntryDiscreteBaseType VariableType

MultiStateDictionaryEntryDiscreteBaseType VariableType The MultiStateDictionaryEntryDiscreteBaseType VariableType is a subtype of the MultiStateValueDiscreteType . It provides dictionary entries for each of the possible states as well as the current state of the MultiStateValueDiscreteType ... approach of associating DictionaryEntryType Nodes with HasDictionaryEntry References cannot be used with a MultiStateValueDiscreteType VariableType due to the EnumValues Property being an Array, making this Type necessary. References can however
OPC-10000-19 – OPC Unified Architecture - Part 19: Dictionary Reference

7.2 MultiStateDictionaryEntryDiscreteType VariableType

MultiStateDictionaryEntryDiscreteType VariableType The MultiStateDictionaryEntryDiscreteType VariableType is a subtype of the MultiStateDictionaryEntryDiscreteBaseType . It requires the ValueAsDictionaryEntries Property . It is formally defined in Table 7 . Table 7 - MultiStateDictionaryEntryDiscreteType Definition Attribute Value BrowseName
OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes

5.1 Overview

following rules apply for using a ReferenceDescription . A ReferenceDescription Variable shall be of VariableType ReferenceDescriptionVariableType (see 5.3.1 ) or a subtype. The ReferenceDescription Variable shall exist only in addition ... make assumptions about the BrowseName and therefore should use for the ReferenceType and/or VariableType to receive ReferenceDescription Variables , not the BrowseName . For each unique Reference ( SourceNode , ReferenceType , IsForward , TargetNode ) there
OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes

5.3.1 ReferenceDescriptionVariableType

Reference . It is not required that the opposite direction is browsable. The VariableType is formally defined in Table 14 . Table 14 - ReferenceDescriptionVariableType Definition Attribute Value BrowseName ReferenceDescriptionVariableType IsAbstract FALSE ValueRank
OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes

5.4.1 HasReferenceDescription

NodeClass . The TargetNode of this ReferenceType shall be a Variable of VariableType ReferenceDescriptionVariableType or one of its subtypes. The HasReferenceDescription is formally defined in Table 15 . Table 15 - HasReferenceDescription Definition
OPC-10000-25 – OPC Unified Architecture - Part 25: Object Serialization

3.1.1 SerializationStartNode

HasSerializationEntity ReferenceType . Note 2 to entry: The SerializationStartNode can also be an ObjectType or VariableType to use the InstanceDeclaration mechanism when creating instances of these types
OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Model

6.3.3 VerifyAsset method

Node may be of any NodeClass, but only the NodeClass of Variable or VariableType can have a non-null value. VerificationResult The result of Asset verification is determined
OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Model

6.4.3 Verify method

Node may be of any NodeClass, but only the NodeClass of Variable or VariableType can have a non-null value . VerificationResult The result of the verification ... array. This also includes if the node type is not a Variable or VariableType and a value is provided. In all cases, the value does not match. Bad_NothingToDo
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

A.4 NodeClass mapping

first introduced in the SystemUnitClass, where they would appear on an ObjectType or VariableType or an object or variable after instantiation. In OPC UA, the attributes that appear ... deleted, they should be ignored. For example, in OPC UA, the ObjectType and VariableType NodeClasses contain an attribute IsAbstract that indicates if direct instances of that type are allowed
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

A.11.4 OPC UA FX Libraries

A.11.4 OPC UA FX Libraries If an ObjectType , VariableType , DataType , or ReferenceType is used in an OPC UA FX Information Model that is not defined in the libraries listed
OPC-10000-100 – OPC Unified Architecture - Part 100: Devices

3.3.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-100 – OPC Unified Architecture - Part 100: Devices

10.2 LifetimeVariableType definition

DataType shall be the same as for the Value of the Variable . This VariableType can be used in various cases. Examples include The Variable just indicates the remaining lifetime
OPC-10000-110 – OPC Unified Architecture - Part 110: Asset Management Basics

3.3.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-120 – OPC Unified Architecture - Part 120: OPC UA and XML Data Type Mapping

3.3.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation

3.3.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation

7.4.1 CalibrationTargetType ObjectType

calibration target provides for calibration and includes its quantity and engineering unit. The VariableType representing calibration values is defined in 7.5.1 . It can contain one or more capacity ranges ... calibration target provides for calibration and includes the quantity and engineering unit. The VariableType representing capacity ranges is defined in 7.5.2 . It can contain other mechanisms to define the features
OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation

7.5.1 CalibrationValueType

value (with engineering unit) that a calibration target provides for calibration of equipment. The VariableType is formally defined in Table 57 . Table 57 - CalibrationValueType Definition Attribute Value BrowseName CalibrationValueType IsAbstract ... base OPC UA specification ( OPC 10000-8 ), and will use this afterwards. The VariableType can be used with an (multi-dimensional) array or scalar values. When a calibration target provides
OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation

7.5.2 CapacityRangeType

range (lowest and highest value), and the resolution the size of each step. The VariableType is formally defined in Table 57 . Table 58 - CapacityRangeType Definition Attribute Value BrowseName CapacityRangeType IsAbstract
OPC-10000-210 – OPC Unified Architecture - Part 210: Relative Spatial Location

3.4.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-210 – OPC Unified Architecture - Part 210: Relative Spatial Location

4.2 Describing relative locations in space

respect to its frame of reference. This leads to the requirement: Provision of a VariableType to express localization information for any kind of position and/or orientation along with its frame
OPC-10000-210 – OPC Unified Architecture - Part 210: Relative Spatial Location

4.3 Standardized description of relative locations in space

same type. This leads to the requirement: Provision of a concrete VariableType which provides information for position in cartesian coordinates and orientation in angles (see 7.3 CartesianFrameAngleOrientationType ) Definition of standardized
OPC-10000-210 – OPC Unified Architecture - Part 210: Relative Spatial Location

5.1 General information about Relative Spatial Location

frame, which can be used with the Relative Spatial Location AddIns , the VariableType CartesianFrameAngleOrientationType (described in 7.3 ) is provided, describing the position by cartesian coordinates and the orientation by angles
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

3.4.3.4 VariableTypes

definitions for the Attributes can be found in OPC 10000-3 . Table 10 - Common VariableType Attributes Attributes Value Value Optionally a server-specific default value can be provided. ArrayDimensions ... then the ArrayDimensions Attribute shall be specified in the table defining the VariableType
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

4.2.3.1 Concepts

Object and Variable Nodes represent instances and they always reference a TypeDefinition ( ObjectType or VariableType ) Node which describes their semantics and structure. Figure 3 illustrates the relationship between an instance
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

6.2 Global Position

relative to a floor level. In order to provide the global position, the GlobalPositionType VariableType is used (see 8.1 ). In Figure 6 , the GlobalPositionType is shown, providing the main information ... example, a UWB (Ultra-Wideband) tag operating in GPS mode). Figure 6 - GlobalPositionType VariableType
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

6.3 Global Location

provide the global position and adds information about the orientation in the GlobalLocationType VariableType (see 8.2 ). It provides the main information as value (in the GlobalLocationDataType ) and in addition ... Figure 7 , the GlobalLocationDataType is shown. Figure 7 - GlobalLocationType VariableType