Overview of the OPC UA DA Collector

The OPC UA Data Access (DA) collector gathers and collects data from a OPC UA 1.0-compliant OPC UA DA server (such as CIMPLICITY). The collector automatically determines the capability of the OPC UA DA server to which it is connected, and supports the appropriate features based on this information.

Features:

You can browse the source for tags and their attributes on an OPC server that supports browsing.
Both the polled and unsolicited data collection are supported; when changes to the OPC source tags are detected, they are sent to the Historian server. Unsolicited data collection is supported for OPC 2.0 only. The minimum poll interval is 100ms. The collector duplicates raw samples from the OPC server into the Historian data archive.
For unsolicited data collection, if collector compression is disabled, all new values produce an exception. And, the deadband percentage is determined by the collector deadband percent. You can only configure the collector deadband percent by enabling compression.
The supported timestamp resolution is 1ms.
Floating point, integer, binary, and string data are supported.
Python expression tags are supported.
Device timestamps are accepted.

Supported data types:


OPC UA DA Collector Data Type	Recommended Data Type in Historian
`OpcUaType_Null`	`ihTKVariableString`
`OpcUaType_Boolean`	`ihTKBool`
`OpcUaType_SByte`	`ihTKByte`
`OpcUaType_Byte`	`ihTKByte`
`OpcUaType_Int16`	`ihTKInteger`
`OpcUaType_UInt16`	`ihTKUInt16`
`OpcUaType_Int32`	`ihTKDoubleInteger`
`OpcUaType_UInt32`	`ihTKUInt32`
`OpcUaType_Int64`	`ihTKInt64`
`OpcUaType_UInt64`	`ihTKUInt64`
`OpcUaType_Float`	`ihTKFloat`
`OpcUaType_Double`	`ihTKDoubleFloat`
`OpcUaType_DateTime`	`ihTKVariableString`
`OpcUaType_Guid`	`ihTKDataTypeUndefined`
`OpcUaType_StatusCode`	`ihTKDataTypeUndefined`
`OpcUaType_String`	`ihTKVariableString`
`OpcUaType_ByteString`	`ihTKDataTypeUndefined`
`OpcUaType_XmlElement`	`ihTKDataTypeUndefined`
`OpcUaType_NodeId`	`ihTKDataTypeUndefined`
`OpcUaType_ExpandedNodeID`	`ihTKDataTypeUndefined`
`OpcUaType_DiagnosticInfo`	`ihTKDataTypeUndefined`
`OpcUaType_QualifiedName`	`ihTKDataTypeUndefined`
`OpcUaType_LocalizedText`	`ihTKDataTypeUndefined`
`OpcUaType_ExtensionObject`	`ihTKDataTypeUndefined`
`OpcUaType_DataValue`	`ihTKDataTypeUndefined`

Supported tag attributes:

Tagname
Source Address
Engineering Unit Description
Data Type
Hi Engineering Units
Lo Engineering Units
Is Array Tag

The Engineering Unit Description, Hi Engineering Units and Lo Engineering Units vary based on the OPC server vendor.

Note: While some of these attributes are queried on a browse, they are not shown in the browse interface. These attributes are used when adding a tag, but it is not visible to you if all attributes come from the server or not.