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AVEVA™ Communication Drivers

OPC UA Data Conversion

  • Last UpdatedNov 19, 2025
  • 2 minute read

The following maps the supported OPC UA data types to OPC data types and to DDE/SuiteLink data types.

OPC UA Type

OPC Variant Type

Suite Link Type

Boolean

VT_BOOL

Discrete

Sbyte

VT_I1

Integer

Byte

VT_UI1

Integer

Int16

VT_I2

Integer

Uint16

VT_UI2

Integer

Int32

VT_I4

Integer

Uint32

VT_UI4/VT_UINT

Integer

Int64

VT_I8

Integer

Uint64

VT_UI8

Integer

Float

VT_R4

Real

Double

VT_R8

Real

String

VT_BSTR

String

DateTime

VT_UI8

Integer

GUID

VT_BSTR

String

ByteString

VT_BSTR

String

XMLElement

VT_BSTR

String

NodeId

VT_BSTR

String

Expanded NodeId

VT_BSTR

String

Qualified Name

VT_BSTR

String

Localized Text

VT_BSTR

String

Status Code

VT_UI4

Integer

Variant

COM VT_Variant

Varies based on the value

Converted based on the native data type of Variant to either :

Integer, String, Discrete, or Real

Enumeration

VT_I4

Integer

Structure/Complex Data Type

Not Supported

Not Supported

Boolean Array

VT_ARRAY | VT_BOOL

Not Supported

Sbyte Array

VT_ARRAY | VT_I1

Not Supported

Byte Array

VT_ARRAY | VT_UI1

Not Supported

Int16 Array

VT_ARRAY | VT_I2

Not Supported

Uint16 Array

VT_ARRAY | VT_UI2

Not Supported

Int32 Array

VT_ARRAY | VT_INT

Not Supported

Uint32 Array

VT_ARRAY | VT_UINT

Not Supported

Int64 Array

VT_ARRAY | VT_I8

Not Supported

Uint64 Array

VT_ARRAY | VT_UI8

Not Supported

Float Array

VT_ARRAY | VT_R4

Not Supported

Double Array

VT_ARRAY | VT_R8

Not Supported

String Array

VT_ARRAY | VT_BSTR

Not Supported

DateTime Array

Not Supported

Not Supported

GUID Array

VT_ARRAY | VT_BSTR

Not Supported

ByteString Array

Not Supported

Not Supported

XMLElement Array

VT_ARRAY | VT_BSTR

Not Supported

NodeId Array

VT_ARRAY | VT_BSTR

Not Supported

Expanded NodeId Array

VT_ARRAY | VT_BSTR

Not Supported

Qualified Name Array

VT_ARRAY | VT_BSTR

Not Supported

Localized Text Array

VT_ARRAY | VT_BSTR

Not Supported

Status Code Array

VT_ARRAY | VT_UI4

Not Supported

Variant Array

VT_ARRAY | VT_VARIANT

Not Supported

Enumeration Array

VT_ARRAY | VT_I4

Not Supported

Structure Array

Not Supported

Not Supported

Note: VT_CY syntax is not supported for an OPC UA data source.

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