Search

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

53 result(s) for VariableTypes

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

4.1 Overview

AddressSpace concepts. Clause 6 defines details on the type model for ObjectTypes and VariableTypes . Standard ReferenceTypes , DataTypes and EventTypes are defined in Clauses 7 to 8.61 . The informative Annex
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

4.6.3 Subtyping

type definitions. The subtyping rules are defined in Clause 6 . Subtyping of ObjectTypes and VariableTypes allows: Clients that only know the supertype to handle an instance of the subtype
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.2 Variable NodeClass

used to represent values which may be simple or complex. Variables are defined by VariableTypes , as specified in 5.6.5 . Variables are always defined as Properties or DataVariables of other Nodes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.6.4 DataVariable

Object . However, complex DataVariables may expose other DataVariables , and ObjectTypes and complex VariableTypes may also contain DataVariables . Therefore each DataVariable shall be the TargetNode of at least one HasComponent Reference
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 ... ModellingRules defined in 6.4.4 . HasComponent 0..* HasComponent References are used for complex VariableTypes to identify their containing DataVariables . Complex VariableTypes can only be used for DataVariables . The referenced Nodes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.1 DataType Model

used to describe the structure of the Value Attribute of Variables and their VariableTypes . Therefore each Variable and VariableType is pointing with its DataType Attribute to a Node ... DataType NodeClass as shown in Figure 17 . Figure 17 - Variables, VariableTypes and their DataTypes In many cases, the NodeId of the DataType Node - the DataTypeId - will be well-known
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.2 Encoding Rules for different kinds of DataTypes

have any encodings and cannot be exchanged on the wire. Variables and VariableTypes use abstract DataTypes to indicate that their Value may be any one of the subtypes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.3 DataType NodeClass

abstract or not. Abstract DataTypes can be used in the AddressSpace , i.e. Variables and VariableTypes can point with their DataType Attribute to an abstract DataType . However, concrete values can never
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

5.8.6.1 Overview

SubtypeRestriction shall only be used on Variables used as instances, never on InstanceDeclarations or VariableTypes . For Method Arguments , it can be used in combination with the HasArgumentDescription
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.1 Overview

Overview In the remainder of Clause 6 the type model of ObjectTypes and VariableTypes is defined regarding subtyping and instantiation
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.3.1 Overview

remainder of 6.3 specify subtyping rules for single inheritance on ObjectTypes and VariableTypes
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.3.2 Attributes

BrowseName and DisplayName values should be overridden. Special rules apply for some Attributes of VariableTypes as defined in 6.2.8 . Optional Attributes , not provided by the parent type, may be added
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.4.4.4.3 ExposesItsArray

ExposesItsArray The ExposesItsArray ModellingRule exposes a special semantic on VariableTypes having a single- or multidimensional array as the data type. It indicates that each value of the array will also
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

6.5 Changing Type Definitions that are already used

used There is no behaviour specified regarding subtypes and instances when changing ObjectTypes and VariableTypes . It is Server -dependent, if those changes are reflected on the subtypes and instances
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.7 HasComponent ReferenceType

DataVariables , and Methods . This ReferenceType is also used to relate complex Variable s or VariableTypes with their DataVariables . Like all other ReferenceTypes , this ReferenceType does not specify anything about
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

7.15 GeneratesEvent

this ReferenceType is to identify the types of Events instances of ObjectTypes or VariableTypes may generate and Methods may generate on each Method call. The SourceNode of References of this
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

A.3 ObjectTypes

only having one value (e.g. a simple heat sensor) can also be modelled as VariableTypes . However, extensibility mechanisms should be considered (e.g. a complex heat sensor subtype could have several
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

A.4.1 General

A.4.1 General VariableTypes are only used for DataVariables and should be used when there are several Variables having the same semantic (e.g. set point). It is not necessary to define
OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model

B.1 Background

marked as <<TypeExtension>>. In addition, the domain model contains ObjectTypes , VariableTypes etc. represented as UML objects (see Figure B.1 ). The OPC Foundation specifies not only
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

5.4 VariableTypes

VariableTypes For all VariableTypes specified in NamespaceIndex 0, the Attributes named in Table 6 shall be set as specified in Table 6 . Table 6 - Common VariableType Attributes Attributes Value Value
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.1 General

extended with additional components this standard allows the extension of the standard VariableTypes defined in this document with additional components. This allows the expression of additional information in the type ... Variable anyway. However, it is not allowed to restrict the components of the standard VariableTypes defined in this International Standard. An example of extending VariableTypes would be putting the standard
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.2 BaseVariableType

BaseVariableType The BaseVariableType is the abstract base type for all other VariableTypes . However, only the PropertyType and the BaseDataVariableType directly inherit from this type. There are no References specified
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.4 BaseDataVariableType

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
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

7.28 3DFrameType

reflects the semantic of its DataType , defined in 12.30 . It refines the DataTypes and VariableTypes of the CartesianCoordinates and Orientation to the corresponding 3D types. The VariableType is formally defined
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

8.2.7 VariableTypes

VariableTypes This standard Object is the browse entry point for VariableType Nodes . Figure 5 illustrates the structure beneath this Node . Only Organizes References are used to relate Objects and VariableTypes ... VariableTypes " standard Object . The " VariableTypes " Object shall not reference any other NodeClasses . Figure 5 - VariableTypes organization The intent of the " VariableTypes " Object is that
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

12.16 ModelChangeStructureDataType

This verb may be used only for affected Nodes that are Variables or VariableTypes . It indicates that the DataType Attribute has changed. Reserved 5:7 Reserved for future use. Shall
OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model

A.1 Overview

following subclauses describe the design decisions made while modelling the Server Object . General DataTypes , VariableTypes and ObjectTypes such as the EventTypes described in this standard are not taken into account
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

F.15 Example

value in the document except for NodeIds that appear in Values of Variables or VariableTypes . <Aliases> <Alias Alias="HasComponent">i=47</Alias
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

1 Scope

defines the information model associated with Data Access (DA). It particularly includes additional VariableTypes and complementary descriptions of the NodeClasses and Attributes needed for Data Access, additional Properties , and other
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

3.1.2 AnalogItem

values provided by temperature sensors or pressure sensors. OPC UA defines specific VariableTypes to identify an AnalogItem . Properties describe the possible ranges of AnalogItems
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

3.1.3 DiscreteItem

number of possible values (e.g., OPENING, OPEN, CLOSING, CLOSED) Note 1 to entry: Specific VariableTypes are used to identify DiscreteItems with two states or with multiple states. Properties specify
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

3.1.4 ArrayItem

Note 1 to entry: Typical examples are the data provided by analyser devices. Specific VariableTypes are used to identify ArrayItem variants
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.1 General

General The DataAccess model extends the variable model by defining VariableTypes . The DataItemType is the base type. ArrayItemType , Base AnalogType and DiscreteItemType are specializations. See Figure 2 . Each of these ... VariableTypes can be further extended to form domain or server specific DataItems . Figure 2 - DataItem VariableType hierarchy
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.3.2.1 General

General The VariableTypes in subclauses 5.3.2.2 to 5.3.2.5 define the characteristics of AnalogItems . The types have identical semantics and Properties but with diverging ModellingRules for individual Properties . The Properties ... only described once - in 5.3.2.2 . The descriptions apply to the Properties for the other VariableTypes as well
OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access

5.4 Address Space model

this case the AnalogItemType ). Additional characteristics of DataItem s are defined using Properties . The VariableTypes in 5.2 specify which properties can exist. These Properties have been found to be useful
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

6.5 Conditions in a VariableType

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

5.2.7 FinalResultData

FinalResultData The FinalResultData ObjectType specifies the VariableTypes that are preserved when the Program has completed its Function . The ObjectType includes a HasComponent for a VariableType of each Variable that comprises
OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines

4.1 General

General This document describes the basic infrastructure to model state machines. It defines ObjectTypes , VariableTypes and ReferenceTypes and explains how they should be used. This document is an integral part
OPC-10000-19 – OPC Unified Architecture - Part 19: Dictionary Reference

4.1 General

reference external dictionaries like IEC Common Data Dictionary or ECLASS. It defines ObjectTypes , VariableTypes and a ReferenceType and explains how they should be used. The ObjectTypes are used to represent
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

A.6 VariableType mapping

VariableType mapping All the rules in A.5 for ObjectTypes also apply to VariableTypes with these notable differences: The base AML SUC for OPC UA VariableTypes is BaseVariableType ; VariableTypes have ... this is that the Value of an instance can be any valid DataType . Typically, VariableTypes that derive from BaseVariable type will alter the DataType of Value to be more restrictive
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

B.1.5 UA SystemUnitClass Library

opcfoundation.org/UA/" defines the SystemUnitClasses that correspond to their equivalent OPC UA ObjectTypes and VariableTypes
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

C.1.4 DI SystemUnitClass Library

opcfoundation.org/UA/DI/" defines the SystemUnitClasses that correspond to their equivalent OPC DI ObjectTypes and VariableTypes
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

D.1.3 OPC UA FX AttributeType Libraries

define the SystemUnitClasses that correspond to their equivalent OPC UA FX ObjectTypes and VariableTypes
OPC-10000-83 – OPC Unified Architecture - Part 83: UAFX OfflineEngineering

E.4 Safety SystemUnitClass Library

/UA/Safety/" defines the SystemUnitClasses that correspond to their equivalent OPC UA Safety ObjectTypes and VariableTypes
OPC-10000-100 – OPC Unified Architecture - Part 100: Devices

3.3.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-110 – OPC Unified Architecture - Part 110: Asset Management Basics

3.3.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-120 – OPC Unified Architecture - Part 120: OPC UA and XML Data Type Mapping

3.3.1.1 Node definitions

exist if the Node is the target of a HasSubtype Reference . For Variables and VariableTypes , the value of the DataType Attribute is a dependency. For DataType Nodes , any DataTypes referenced
OPC-10000-120 – OPC Unified Architecture - Part 120: OPC UA and XML Data Type Mapping

3.3.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation

3.3.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-210 – OPC Unified Architecture - Part 210: Relative Spatial Location

3.4.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

3.4.1.1 Node definitions

exist if the Node is the target of a HasSubtype Reference . For Variables and VariableTypes , the value of the DataType Attribute is a dependency. For DataType Nodes , any DataTypes referenced
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

3.4.3.4 VariableTypes

VariableTypes For all VariableTypes specified in this document, the Attributes named in Table 10 shall be set as specified in the table. The definitions for the Attributes can be found
OPC-10000-211 – OPC Unified Architecture - Part 211: Global Positioning

4.2.3.3 Companion Specifications

specification for an industry specific vertical market describes an Information Model by defining ObjectTypes , VariableTypes , DataTypes and ReferenceTypes that represent the concepts used in the vertical market, and potentially also