Tag Definitions
Tags and the hierarchies to which they belong provide powerful tools for configuring data analysis. This topic documents the
tag definitions that come with the Analytics tag dictionary.
The properties on each Simple Tag Info Property Sheet may or may not include default facets.
Figure 1. Simple Tag Info properties
To view these properties, double-click the tag in the tag dictionary.
| Property | Value | Description |
|---|---|---|
| Validity | Always or Or |
Provides a way to identify a data source. |
| Default Value | marker or a value
|
A tag that is identified as a marker tag does not require a value. For value tags, use this property to configure a default value. |
| defFacets | units, precision, min, max, etc. | Clicking the chevron to the right of this property opens a standard Config Facets window. The facets you configure here serve as defaults for the point to which this tag is assigned. Other facet configurations can override these settings. |
Pre-defined tag definitions
The framework comes with several pre-defined tag definitions in addition to the Haystack tags. You precede each of these tags with a:.
| Tag definition | Identifies an entity as a source of... |
|---|---|
| a | values to be used by Analytics. All points used for Analytics must be tagged with this tag as they count towards the total allowed by your framework license. |
| ahuMode | an air handling unit mode. |
| chilledWaterUsage | chilled water usage indicator. |
| differential | differences between amounts of things. |
| economizer | information about a part of a building’s cooling system that uses cool outdoor air to cool rather than operating the air conditioning compressor. |
| elecMeter | input from an electric meter. |
| enthalpy | input from a thermodynamic quantity equivalent to the total heat content of a system. |
| roomHumidity | room humidity. |
| secondary | information from a secondary controller. |
| space | information from a building space. |
| static | static pressure. |
| status | information related to performance. |
| steamUsage | information from a steam boiler. |
| steamWaterUsage | information regarding steam usage. |
| supply | supply air control. |
| vahhlmt | Variable Air Humidity High Limit |
| vahllmt | Variable Air Humidity Low Limit |
| vathlmt | Variable Air Temperature High Limit |
| vathlmt | Variable Air Temperature Low Limit |
| waterMeter | Identifies a water meter. |