Overview
The Historian Namespace exposes properties and methods from the .NET objects used by the Historian Module execution. You can use these properties and methods on your Displays or to create Scripts and Alarms.
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Runtime Attributes
HistorianTable Runtime AttributesHistorianTables Tag Historian Values
Like all objects in the Platform HistorianTables have their set or properties and Methods.
Particularly, there a method methods that is frequently used by application, which is to retrieve the historian contents, generating a DataTable with the results.
Those Methods are mainly on the Tag namespace and , HistorianTabe namespaces, using the TK toolkit methods.
| Method | Description |
|---|---|
| TK.GetTagHistorian |
| Gets Historian data from a Tag, given a date range |
| TK.GetValueFromHistorian |
| Gets one specifi value from the Historian Database |
| Historian.Table.Table1.SaveToTextFile |
| Export contents to CSV files | |
| Historian |
| .Table.Table1.GetObjectList |
| Get List of Tags used by each HistorianTable |
Some other methods have the focus on the state of the execution of the Historian Module itself.
Property | Type | Description | Property path on CodeBehind |
|---|---|---|---|
| Boolean | Indicates the operational status Module Historian has started. When true, the Module Historian actively archives data. When false, no data archiving occurs. |
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| String | Indicates the success or failure when initiating the Module Historian. If the Module Historian starts successfully, the system returns an OK string. The system provides a descriptive error message in case of failure during the initiation process to help you diagnose and troubleshoot the issue. |
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| Boolean | A Boolean flag that enables the creation of temporary binary files on the server to optimize the TrendChat object performance when handling large datasets. Setting to true improves responsiveness and efficiency. |
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To learn about the basic concepts of namespaces and objects, you can refer to → Read more about Objects, and access the Namespace API, at Objects and Namespaces.
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