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OPC Data Types

The following table lists the OPC data types recommended for use with Historian

Note: The OPC Collector requests data from the OPC server in the native data type. Then the OPC collector converts the received value to a Historian Data Type before sending it to the data archiver.

OPC Data Type	Recommended Data Type in Historian
I1 - 16 bit signed integer	Single Integer
I4 - 32 bit signed integer	Double Integer
R4 - 32 bit float	Single Float
R8 - 64 bit double float	Double Float
UI2 - 16 bit unsigned single integer	Unsigned Single Integer
UI4 - 32 bit unsigned double integer	Unsigned Double Integer
UI8 - 64 bit unsigned quad integer	Unsigned Quad Integer
I8 - 64 bit quad integer	Quad Integer
BSTR	Variable String
BOOL	Boolean
I1 - 8 bit single integer	Byte