4 State Machine Model ToC Previous

4.4 Representation of state machines in the AddressSpace ToC Previous Next

4.4.8 StateType ToC Previous Next index

States of a FiniteStateMachine are represented as Objects of the StateType. Each Object of the StateType or one of its subtypes shall be referenced from the ObjectType FiniteStateMachineType or one of its subtypes using a HasComponent Reference or a subtype of HasComponent and shall not have a ModellingRule as they are not applied on the instances.

The StateType is formally defined in Table 7.

Table 7 – StateType definition

Attribute Value
BrowseName StateType
IsAbstract False

Subtype of the BaseObjectType defined in OPC 10000-5

Note that a Reference to this subtype is not shown in the definition of the BaseObjectType.

References NodeClass BrowseName DataType TypeDefinition ModellingRule
HasProperty Variable StateNumber UInt32 PropertyType Mandatory
HasSubtype ObjectType InitialStateType Defined in 4.4.9    
HasSubtype ObjectType ChoiceStateType Defined in 4.6.2    
Conformance Units          
Base Info Finite State Machine Instance          

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