Overview
When any Tag is registered into a Historian module to record the value over time or events, it is called HistorianTag.
The HistorianTag can be any of this types: INT, Digital, Decimal or TextA HistorianTag represents a specific data point you want to track and store over time. The HistorianTags definition links a Tag to a HistorianTable for organized storage, supporting various data types. When you map the tag to a HistorianTable, it will record the value changes or events associated tag over time.
Understanding HistorianTagsUnderstanding Historian Tags
When any Tag is registered into a Historian module to record the value over time or events, it is become a Historian Tag.
Historian Tags are used when you need to archive data, especially when dealing with process control and manufacturing, but not restricted to. You have the option to archive the following Historian Tag types:
- Integer
- Decimal (float)
- Text (string)
- Digital (boolean)
a solution Tag, or an external Asset, is mapped to be archived or retrieved from an Historian, that configuration is called a HistorianTag.
When you define HistorianTagsWhen you use Historian Tags, you archive data by associating information with specific tags and tablesHistorianTables in Storage Locations. In other words, you establish a link between Tags and Historian Tables HistorianTables to ensure systematic and organized data storage. You can also archive Template Tags. For this case, you can specify one of the Tamplate Tag's properties or archive all properties by entering only the main Tag name.
To utilize Historian Tags, you need to define which Tags are associated with each Historian Table.
Historian Tags allow users to archive data effectively. To add a tag, users enter the TagName and select a Historian table. This interface offers flexibility with optional settings and supports the use of template tags for storing specific properties or all properties associated with a main tag name.
Definition
Historian Tags is a tool that facilitates the archiving of data by associating it with specific tags and tables.
Purpose
The purpose of Historian Tags is to facility the store data.
Function
Historian Tags function by linking tags to a table into the ArchiveLocation.
Operation
Users operate Historian Tags by entering a tag name and choosing a Historian table for archiving. For template tags, users either select a specific property or store all properties by entering the main tag name.
Application
Historian Tags apply in scenarios where data collection, archiving, and retrieval are necessary. They are crucial in fields like process control, manufacturing, and other industrial applications where historical data analysis is essential.
Usage
To use Historian Tags, go to Historian → Historian Tags, enter the tag name, select a Historian table, and configure additional settings if needed. For template tags, users specify whether to store specific properties or all associated properties.
When archiving Tags created using DataTemplates, you don't need to specify all the properties.
The two pieces of Information that are mandatory to define an Historian Tags are:
TagName: variables that will archived, or retrieved.
HistorianTable: logical object that groups data and defines the storage location to which that variable will be connected.
Configuring HistorianTags
Before setting HistorianTags, you need to configure the HistorianTables. However, you can use the default one (Table 1).
After configuring the HistorianTables
Configuring Historian Tags
Before setting Historian Tags, you need to configure the HIstorian Tables. However, you have the option to use the default one (Table1) if you prefer.
After configuring the Historian Tables, you can start defining which Tags to archived archive with the configured Historian TablesHistorianTables. To add and configure a single Tag, follow the steps below:
Access Historian
→/ Historian Tags.
- Type
On the TagName column, type the Tag name
,or select
itfrom the
TagName column
Go to Historian → Historian Tags.
available list. Alternatively, copy and paste the Tag's name from Unified Namespace / Tags.
Configure
the
Historian Tags properties
DeadBand, Deviation, and RateOfChange. The following section describes each of these configurations.
Select if the platform should consider an Absolute or Percentual as the DeviationDeadBandType.
To finish, select the HistorianTable, where the Tags' information will be archived.
The image below illustrates the process described above.
HistorianTags Properties
When configuring a HistorianTag, you need to specify some properties that will define how data will be archived. The following table describes each available property you can configure:
| Property | Description |
|---|---|
TagName | Specify the unique identifier of the Tag to be archived. To archive Template Tags, specify one of the Template Tag's properties or archive all properties by entering only the primary Tag name. |
DeadBand | (Optional feature) Defines |
Historian Tags Properties | |
ID | Uniquely identifies a record in a database. |
VersionID | Tracks different versions of a record as it changes. |
TagName | Gives a descriptive name to a data point for reference. |
DeadBand | Range of values that triggers no update or alarm. |
Deviation | Measures difference from an expected value. |
RateOfChange | Shows how quickly a value changes. |
DeviationDeadBandLimit | Sets a specific limit for deviations. |
DeviationDeadBandType | Determines the calculation method for the dead band. |
HistorianTable | Records historical data points. |
LockState | Indicates whether someone has locked a record from changes. |
LockOwner | Shows who has the editing lock. |
DateCreated | Indicates when someone created the record. |
DateModified | Indicates when someone last modified the record. |
TagName
Enter a tag name or click ... to select a tag.
DeadBand
how much the value must change (in Units) for the system to store the value. This configuration is considered when you use the SaveOnChange option in the |
HistorianTable. |
Deviation |
(Optional feature) Specify how much the value must change (in Units) for the system to store the value. This configuration is considered when you use the TimeDeadBand option in the |
HistorianTable. If you define this property, its value overrides the |
TimeDeadband logging interval. |
RateOfChange |
(Optional feature) Defines how much the value must change (in Units) by second |
for the system to store the value. This configuration is considered when you use the TimeDeadBand option in the |
HistorianTable. If you define this property, its value overrides the |
TimeDeadband logging interval. | |
DeviationDeadBandType | (Optional feature) Determines the calculation method used to define the Deadband value. |
HistorianTable | Select the |
HistorianTable to use |
when saving the Tag's value. |
For definitions of other columns that are available in many tables, see Common Column Definitions.
Adding Tags for Data Logging
After you configure your tables for the tag historian, you can configure the tags that will be logged.
To configure the tags for the tag historian:
- Chose a previously created tag to store.
- Go to Historian > Historian Tags.
- Fill the TagName field with the previously chosen name.
- Fill in the HistorianTable field with the previously chosen table.
- If necessary, configure more settings, but in general cases it is not necessary.
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