EventQueueOverflow Eventsare generated when an internal queue of a MonitoredItem subscribing for Eventsin the Serveroverflows. OPC 10000-4defines when the internal EventQueueOverflow Eventsshall be generated.

The EventTypefor EventQueueOverflow Eventsis formally defined in Table 55.

Table 55– EventQueueOverflowEventType Definition

Attribute	Value
BrowseName	EventQueueOverflowEventType
IsAbstract	True
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the BaseEventTypedefined in 6.4.2, which means it inherits the InstanceDeclarations of that Node.

This EventTypeinherits all Propertiesof the BaseEventType. Their semantic is defined in 6.4.2. The SourceNode Propertyfor Eventsof this type shall be assigned to the NodeIdof the Server Object. The SourceNamefor Eventsof this type shall be “Internal/EventQueueOverflow”.