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The OPC Binary Type Description System defines a number of standard type descriptions that can be used to describe many common binary encodings using a StructuredType. The standard type descriptions are described in Table E.9.
Table E.9 – Standard Type Descriptions
|
Type name |
Description |
|
Bit |
A single bit value. |
|
Boolean |
A two-state logical value represented as an 8-bit value. |
|
SByte |
An 8-bit signed integer. |
|
Byte |
An 8-bit unsigned integer. |
|
Int16 |
A 16-bit signed integer. |
|
UInt16 |
A 16-bit unsigned integer. |
|
Int32 |
A 32-bit signed integer. |
|
UInt32 |
A 32-bit unsigned integer. |
|
Int64 |
A 64-bit signed integer. |
|
UInt64 |
A 64-bit unsigned integer. |
|
Float |
An ISO/IEC/IEEE 60559:2011single precision floating point value. |
|
Double |
An ISO/IEC/IEEE 60559:2011 double precision floating point value. |
|
Char |
An 8-bit UTF-8 character value. |
|
String |
A sequence of UTF-8 characters preceded by the number of UTF-8 Code Units (bytes). |
|
WideString |
A sequence of UTF-16 characters preceded by the number of UTF-16 Code Units. |
|
DateTime |
A 64-bit signed integer representing the number of 100 nanoseconds intervals since 1601-01-01 00:00:00. This is the same as the WIN32 FILETIME type. |
|
ByteString |
A sequence of bytes preceded by its length in bytes. |
|
Guid |
A 128-bit structured type that represents a WIN32 GUID value. |