7 OPC UA ObjectTypes ToC Previous Next

7.1 CtrlConfigurationType ObjectType Definition ToC Previous Next

7.1.1 Overview ToC Previous Next index

This ObjectType defines the representation of a Ctrl Configuration of a programmable Controller system in an OPC UA Address Space. It introduces Objects to group Ctrl Resources and different types of Ctrl Variables. The CtrlConfigurationType is derived from the TopologyElementType defined in OPC 10000-100. Figure 15 shows the CtrlConfigurationType. It is formally defined in Table 8. The dark grey nodes in the figure are examples and are not part of the ObjectType definition.


Figure 15 – CtrlConfigurationType Overview

The Ctrl Configuration type is formally defined in Table 8.

Table 8 – CtrlConfigurationType Definition

Attribute Value        
BrowseName CtrlConfigurationType        
IsAbstract False        
References Node Class BrowseName DataType TypeDefinition Modelling Rule
Subtype of the TopologyElementType defined in OPC 10000-100, i.e. inheriting the InstanceDeclarations of that Node.          
HasComponent Object 2:MethodSet   BaseObjectType Optional
HasComponent Object Resources   ConfigurableObjectType Mandatory
HasComponent Object GlobalVars   FunctionalGroupType Optional
HasComponent Object AccessVars   FunctionalGroupType Optional
HasComponent Object ConfigVars   FunctionalGroupType Optional
HasComponent Object Configuration   FunctionalGroupType Optional
HasComponent Object Status   FunctionalGroupType Optional

The CtrlConfigurationType ObjectType is a concrete type and can be used directly. It is recommended to create subtypes for vendor or user specific configurations.

A concrete Ctrl Configuration type or instance may have ParameterSet, Parameters and FunctionalGroups as defined for the TopologyElementType in OPC 10000-100.

The MethodSet Object is defined by the TopologyElementType and is overwritten in the CtrlConfigurationType to add the HasComponent References to the Methods defined for the CtrlConfigurationType.

The Object Resources is used to group Ctrl Resources that are part of the Ctrl Configuration. It uses the concept of configurable Objects defined OPC 10000-100. It contains Objects of the type CtrlResourceType representing a Ctrl Resource and a Folder with possible Ctrl Resource types that can be instantiated in the Ctrl Configuration. For a complete configuration at least one resource is necessary from an IEC 61131-3 point of view but not necessary from an OPC UA point of view. Temporary, incomplete configurations are allowed, e.g. during a configuration process.

The FunctionalGroup GlobalVars contains the corresponding list of Ctrl Variables declared by the key word VAR_GLOBAL.

The FunctionalGroup AccessVars contains the corresponding list of Ctrl Variables declared by the key word VAR_ACCESS.

The FunctionalGroup ConfigVars contains the corresponding list of Ctrl Variables declared by the key word VAR_CONFIG.

The FunctionalGroup Configuration contains configuration Variables and Methods like start and stop.

The FunctionalGroup Status contains diagnostic and status information like system variables, status variables or diagnostic codes.

Starting a Ctrl Configuration causes the initialization of global Ctrl Variables and the start of all Ctrl Resources. Stopping a Ctrl Configuration stops all Ctrl Resources.

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