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.
Below you find a table describing the most used properties from the Historian Namespace. Access the Historian Namespace page for a complete list of available options.
Property | Type | Description | Property path on CodeBehind |
|---|---|---|---|
| Boolean | This is a Boolean flag that indicates whether the Module Historian has started. If the flag is set to "true," it means that the Module Historian is up and running, actively archiving data according to the configured Historian Tables. If the flag is set to "false," the Module Historian has not yet started, and no data archiving is taking place. |
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| String | This is a string that displays a message indicating the success or failure when initiating the Module Historian. If the Module Historian starts successfully, the message will typically show "OK" or a similar confirmation. If there is an error during the initiation process, the message will display an error description to help diagnose and troubleshoot the issue. |
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| Boolean | This is a Boolean flag that, when enabled, allows the creation of temporary binary files on the server computer to optimize the performance of the TrendChart object when requesting large amounts of data. With caching enabled, the system can quickly retrieve the necessary data for the TrendChart object without causing significant delays or performance issues. By setting this flag to "true," users can benefit from improved performance and responsiveness when working with large datasets in the TrendChart object. |
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To learn about the basic concepts of namespaces and objects, you can refer to Objects and Namespaces.