Edge SoftwareDetails of Capabilities
In both reading and writing (GET and SET), tags are addressed using OPC-UA XML Syntax:
- String NodeID form:
"ns=4;s=Foo.Bar.Baz" - IntegerNodeID form:
"ns=34;i=11902"
If ns is omitted, namespace 0 is assumed: "s=Foo.Bar.Baz"
The value will be returned as a JSON string of the form:
{"val":<data>, "type":<typename>}Only numeric and the STRING and DATE_TIME types are returned currently. Other data types are not supported and the value will be “UNKNOWN”.
The supported types are:
- float
- double
- bool
- byte
- sbyte
- int16
- uint16
- int32
- uint32
- int64
- uint64
- string
- datetime
To be compatible with JSON style SET node refs (described below) the GET method will accept node refs starting with “/json?”. So the two node refs /json?ns=4;i=1900 and ns=4;i=1900 are equivalent.
The supported types in flat JSON and their corresponding versions in the OPC-UA specification are as follows:
| Flat JSON | OPC-UA |
|---|---|
| bool | boolean |
| int8 | sbyte |
| int16 | int16 |
| int32 | int32 |
| int64 | int64 |
| uint8 | byte |
| uint16 | uint16 |
| uint32 | uint32 |
| uint64 | uint64 |
| float | float |
| double | double |
| string | string |
| datetime | datetime |