This Object is used as the browse entry point for information about the Aggregates supported by a Server. The content of this Object is already defined by its type definition. All Instances of the FolderType use the standard BrowseName of ‘AggregateFunctions’. The HasComponent Reference is used to relate a ServerCapabilities Object and/or any HistoryServerCapabilitiesType Object to an AggregateFunction Object. AggregateFunctions is formally defined in Table 3.
Table 3 – Aggregate Functions Definition
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Attribute |
Value |
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|
BrowseName |
AggregateFunctions |
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|
References |
Node Class |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
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|
HasTypeDefinition |
Object Type |
Defined in OPC 10000-5 |
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Conformance Units |
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Historical Access Aggregates |
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Each ServerCapabilities and HistoryServerCapabilitiesType Object shall reference an AggregateFunction Object. In addition, each HistoricalConfiguration Object belonging to a HistoricalDataNode may reference an AggregateFunction Object using the HasComponent Reference.