A Data Point Tag stores a single data value with an associated quality and timestamp.
These Data Point Tags are supported:
| Icon | Tag Type | Version | Description |
|---|---|---|---|
| Analog Data Point Tag | 1.0 | A floating point value. |
| Digital Data Point Tag | 1.0 | A single bit or boolean value. |
| Double Word Data Point Tag | 1.3 | A 32-bit word value. |
| Long Word Data Point Tag | 3.48 | A 64-bit word value. |
| String Data Point Tag | 1.2 | A string value. |
| Word Data Point Tag | 1.2 | A 16-bit integer value. |
The Data Point Tag supports the configuration properties of the Core Tag plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| AllowForce | BOOL | 3.21 | Whether the user can force the tag's value to a fixed constant value. |
The Data Point Tag supports the data properties of the Core Tag, plus these data properties:
| Property | Type | Description |
|---|---|---|
| DataSource | WSTRING | A string describing where the tag data originates from. |
| IODataSource | WSTRING | The full name of the tag where the data originates from. |
| DisplayValue | WSTRING | The value of the tag after applying any display format. |
| DisplayUnits | WSTRING | Any units configured on the tag. |
| DisplayColor | DWORD | The display color of the tag. |
| HistoricDataTable | STRING | The name of the database table used to store historic values for this tag. |
The Data Point Tag builds on the features of these tag types:
The Data Point Tag is used as a building block for these tag types:
For the meaning of terms used in Fernhill SCADA.