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4.4 Representation of state machines in the AddressSpace ToC Previous Next

4.4.10 TransitionType ToC Previous Next index

Transitions of a FiniteStateMachine are represented as Objects of the ObjectType TransitionType formally defined in 4.4.10. Each Object of the TransitionType 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.

Each valid Transition shall have exactly one FromState Reference and exactly one ToState Reference, each pointing to an Object of the ObjectType StateType.

Each Transition can have one or more HasCause References pointing to the cause that triggers the Transition.

Each Transition can have one or more HasEffect References pointing to the effects that occur when the Transition was triggered.

Table 9 – TransitionType definition

Attribute Value
BrowseName TransitionType
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 TransitionNumber UInt32 PropertyType Mandatory
Conformance Units          
Base Info Finite State Machine Instance          

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