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<< 点击显示目录 >> 主页 OPC UA使用助手 > OPC UA 帮助 > 信息模型 > 数据类型分配 > IEC标准数据类型映射 |
由于不是所有的IEC标准数据类型都可以用OPC UA，这些数据类型必须被映射。对于一些数据类型，如字符串和DateTime，需要从目标系统上的格式转换到OPC UA服务器上的格式。
下表列出了所有的映射以及关于编码的信息：
IEC data type |
UA data type |
Comment |
BOOL |
Boolean |
|
|
|
|
SINT |
SByte |
|
INT |
Int16 |
|
DINT |
Int32 |
|
LINT |
Int64 |
No process variables of this type are currently possible. |
USINT |
Byte |
|
UINT |
UInt16 |
|
UDINT |
UInt32 |
|
ULINT |
UInt64 |
No process variables of this type are currently possible. |
|
|
|
REAL |
Float |
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LREAL |
Double |
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|
|
|
BYTE |
Byte |
1-byte bit mask |
WORD |
UInt16 |
2-byte bit mask |
DWORD |
UInt32 |
4-byte bit mask |
LWORD |
UInt64 |
No process variables of this type are currently possible. |
|
|
|
STRING |
String |
ASCII or ISO 8859 on the server is converted from/to UTF-8. |
WSTRING |
String |
Wide character Unicode on the server is converted from/to UTF-8. |
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|
|
DATE_AND_TIME |
DateTime |
4-byte date and time from 1970-01-01-00:00:00 to 2106-02-07-06:28:15 from/to 8-byte OPC UA date and time |
TIME |
UInt32 |
4-bytetime from -24d:20h:31m:23s:648ms to 24d:20h:31m:23s:647ms |
DATE |
DateTime |
4-byte date from 1970-01-01 to 2106-02-07 from/to 8-byte OPC UA date and time |
TIME_OF_DAY |
UInt32 |
4-bytetime from 00:00:00 to 23:59:59.999 |
|
|
|
OCTET |
ByteString |
No process variables of this type are currently possible. |