This EventType is defined in OPC 10000-3. Its representation in the AddressSpace is formally defined in Table 52.
Table 52 – SystemStatusChangeEventType definition
|
Attribute |
Value |
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|
BrowseName |
SystemStatusChangeEventType |
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|
IsAbstract |
True |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
|
Subtype of the SystemEventType defined in 6.4.28, which means it inherits the InstanceDeclarations of that Node. |
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|
HasProperty |
Variable |
SystemState |
ServerState |
PropertyType |
Mandatory |
|
|
Conformance Units |
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|
Base Info System Status Underlying System |
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|
Base Info System Status |
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This EventType inherits all Properties of the SystemEventType. Their semantic is defined in 6.4.28. The SourceNode Property and the SourceName shall identify the system. The system can be the Server itself or some underlying system.
The SystemState specifies the current state of the system. Changes to the ServerState of the system shall trigger a SystemStatusChangeEvent, when the event is supported by the system.