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6.4 ObjectTypes used as EventTypes ToC Previous Next

6.4.25 AuditWriteUpdateEventType ToC Previous Next index

This EventType is defined in OPC 10000-3. Its representation in the AddressSpace is formally defined in Table 46.

Table 46 – AuditWriteUpdateEventType definition

Attribute Value
BrowseName AuditWriteUpdateEventType
IsAbstract True

Subtype of the AuditUpdateEventType defined in 6.4.24, which means it inherits the InstanceDeclarations of that Node.

References NodeClass BrowseName DataType TypeDefinition ModellingRule
HasProperty Variable AttributeId UInt32 PropertyType Mandatory
HasProperty Variable IndexRange NumericRange PropertyType Mandatory
HasProperty Variable NewValue BaseDataType PropertyType Mandatory
HasProperty Variable OldValue BaseDataType PropertyType Mandatory
Conformance Units          
Auditing Write          

This EventType inherits all Properties of the AuditUpdateEventType. The SourceName for Events of this type shall be “Attribute/Write”. Their semantic is defined in 6.4.24.

AttributeId identifies the Attribute that was written. The SourceNode Property identifies the Node that was written.

IndexRange identifies the index range of the written Attribute if the Attribute is an array. If the Attribute is not an array or the whole array was written, the IndexRange is set to null.

NewValue identifies the value that was written. If the IndexRange is provided, only the values in the provided range are shown.

OldValue identifies the value that the Attribute contained before the write. If the IndexRange is provided, only the value of that range is shown. It is acceptable for a Server that does not have this information to report a null value.

Both the NewValue and the OldValue will contain a value in the DataType and encoding used for writing the value.

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