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The AuditProgramTransitionEventType is a subtype of the AuditUpdateStateEventType. It is used with Programs to provide a means to audit the Program State transitions associated with any Client invoked Program Control Method. Servers shall generate AuditProgramTransitionEvents if they support the Audit Server Facet Profile defined in OPC 10000-7.

Table 11 specifies the definition of the AuditProgramTransitionEventType.

Table 11 – AuditProgramTransitionEventType

Attribute	Value
BrowseName	AuditProgramTransitionEventType
IsAbstract	True
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the AuditUpdateStateEventType defined in OPC 10000-5.
HasProperty	Variable	TransitionNumber	UInt32	PropertyType	Mandatory

This EventType inherits all Properties of the AuditUpdateStateEventType defined in OPC 10000-5, except as noted below.

The Status Property, specified in OPC 10000-5,, identifies whether the state transition resulted from a Program Control Method call (set Status to ) or not (set Status to FALSE).

The SourceName specified in OPC 10000-5, identifies the Method causing the Program transition when it is the result of a Client invoked ProgramControlMethod. The SourceName is prefixed with “Method/” and the name of the ProgramControlMethod, “Method/Start” for example.

The ClientUserId Property, specified in OPC 10000-5, identifies the user of the Client that issued the Program Control Method if it is associated with this Program state transition.

The ActionTimeStamp Property, specified in OPC 10000-5 “AuditEventType”, identifies when the time the Program state transition that resulted in the Event being generated occurred.

The TransitionNumber Property is a Variable that identifies the transition that triggered the Event.