The HasEffectEnable ReferenceType is a concrete ReferenceType and can be used directly. It is a subtype of HasEffect.

The semantic of this ReferenceType is to point form a Transition to an Alarm that will be enabled.

• If the Reference is to an Object then all Alarms in the HasNotifier hierarchy below that Object are enabled,
• If the target is an AlarmType then all instances of that AlarmType in the HasNotifier hierarchy below the Object containing the StateMachine are enabled
• If the target is an Alarm instance then the given Alarm instance is enabled.

The SourceNode of this ReferenceType shall be an Object of the ObjectType TransitionType or one of its subtypes. The TargetNode can be of any NodeClass.

The representation of the HasEffectEnable ReferenceType in the AddressSpace is specified in Table 139

Table 139 – HasEffectEnable ReferenceType

Attributes	Value
BrowseName	HasEffectEnable
InverseName	MayBeEnabledBy
Symmetric	False
IsAbstract	False
References	NodeClass	BrowseName	Comment
ConformanceUnits
A & C Statemachine Trigger