The Internal String Data Point Tag stores a variable length string value
internally in the Fernhill SCADA Server.
The Internal String Data Point Tag is a license free tag. You can create any number of these tags without restriction.
The Internal String Data Point Tag supports the configuration properties of the String Data Point Tag plus these properties:
Property | Type | Version | Description |
---|---|---|---|
ApplyInitialValue | USINT | 3.13 |
Defines when the initial value should be applied to the tag. Options are: 0 = Never, 1 = If no value written, 2 = On server restart. |
InitialValue | WSTRING | 3.13 | The initial value of the tag. |
ShowWriteValue | BOOL | 3.34 | Whether to show the WriteValue Tag Command in the Standard Tag Menu. |
ShowWriteValueQuality | BOOL | 3.34 | Whether to show the WriteValueQuality Tag Command in the Standard Tag Menu. |
The ApplyInitialValue property defines when the InitialValue property is applied to the tag. The options are:
ApplyInitialValue | Rules |
---|---|
Never |
|
If no value written |
|
On server start |
|
Note: In the above table, a "Data Write" includes:
The Internal String Data Point Tag supports the data properties of the String Data Point Tag.
The Internal String Data Point Tag supports tag commands of the String Data Point Tag plus these tag commands:
Tag Command | Version | Description |
---|---|---|
WriteValue | 1.2 |
Writes a new string value to the tag.
The maximum length of the string allowed is:
|
WriteValueQuality | 1.2 |
Writes a new string value and quality to the tag.
The maximum length of the string allowed is:
|
The Internal String Data Point Tag builds on the features of these tag types:
To learn about properties common to all String Tags.
To learn about the Core Data Driver.
For the meaning of terms used in Fernhill SCADA.