5 Model

5.11 Condition Refresh related Events

5.11.4 RefreshRequiredEventType

This EventType is used by a Server to indicate that a significant change has occurred in the Server or in the subsystem below the Server that may or does invalidate the Condition state of a Subscription. Its representation in the AddressSpace is formally defined in Table 133.
Table 133 – RefreshRequiredEventType definition
Attribute | Value |
---|---|
BrowseName | RefreshRequiredEventType |
IsAbstract | True |
References | NodeClass | BrowseName | DataType | TypeDefinition | ModellingRule |
---|---|---|---|---|---|
Subtype of the SystemEventType defined in 10000-5, i.e. it has HasProperty References to the same Nodes. | |||||
ConformanceUnits | |||||
A & C Refresh | |||||
A & C Refresh2 |
When a Server detects an Event queue overflow, it shall track if any Condition Events have been lost, if any Condition Events were lost, it shall issue a RefreshRequiredEventType Event to the Client after the Event queue is no longer in an overflow state.