ISA95PrepareStateMachineType – OPC UA for ISA-95

6.2.3 ISA95PrepareStateMachineType

This ObjectType describes a SubStateMachine that a job order may use while already stored in the system but not being executed. The ObjectType formally defined in Table 40.

Table 40 – ISA95PrepareStateMachineType definition

Attribute	Value
BrowseName	ISA95PrepareStateMachineType
IsAbstract	False

References	Node Class	BrowseName	TypeDefinition
Subtype of the 0:FiniteStateMachineType defined in OPC 10000-16, i.e. inheriting the InstanceDeclarations of that Node.
0:HasComponent	Object	Waiting	0:StateType
0:HasComponent	Object	Ready	0:StateType
0:HasComponent	Object	Loaded	0:StateType
0:HasComponent	Object	FromWaitingToReady	0:TransitionType
0:HasComponent	Object	FromReadyToLoaded	0:TransitionType
0:HasComponent	Object	FromReadyToWaiting	0:TransitionType
0:HasComponent	Object	FromLoadedToReady	0:TransitionType
0:HasComponent	Object	FromLoadedToWaiting	0:TransitionType

Conformance Units
ISA-95 Job Control Job Order Receiver SubStates

The components of the ObjectType have additional references which are defined in Table 41.

Table 41 – ISA95PrepareStateMachineType additional References

SourceBrowsePath	Reference Type	Is Forward	TargetBrowsePath
FromWaitingToReady	0:FromState	True	Waiting
	0:ToState	True	Ready
FromReadyToLoaded	0:FromState	True	Ready
	0:ToState	True	Loaded
FromReadyToWaiting	0:FromState	True	Ready
	0:ToState	True	Waiting
FromLoadedToReady	0:FromState	True	Loaded
	0:ToState	True	Ready
FromLoadedToWaiting	0:FromState	True	Loaded
	0:ToState	True	Waiting

The component Variables of the ISA95PrepareStateMachineType have additional Attributes defined in Table 42.

Table 42 – ISA95PrepareStateMachineType Attribute values for child Nodes

BrowsePath	Value Attribute	Description
Waiting		The necessary pre-conditions have not been met and the job order is not ready to run.
	1
Ready		The necessary pre-conditions have been met and the job order is ready to run, awaiting a Start command.
	2
Loaded		In situations where only one job may be in active memory and is able to be run, then the job is loaded in active memory, the necessary pre-conditions have been met, and the job order is ready to run, awaiting a Start command.
	3
FromWaitingToReady		This transition is triggered when the system is ready to start the execution of the job order.
	1
FromReadyToLoaded		This transition is triggered when the program or configuration to execute the job order is loaded.
	2
FromReadyToWaiting		This transition is triggered when the system is not ready to start the execution of the job order anymore.
	3
FromLoadedToReady		This transition is triggered when the program or configuration to execute the job order is unloaded.
	4
FromLoadedToWaiting		This transition is triggered when the system is not ready to start the execution of the job order anymore.
	5