def
his-point
Historized point with a history log of timestamp/value pairs. Points marked as historized indicate the system can response to queries via the hisRead operation to return a trend log of timestamp/value pairs.
There are typically two mechanisms for historization:
- the local system performs the historization by logging the point's
curValto local storage - in overlay systems a downstream device performs the historization and the local system synchronizes the history data in batch on a periodic basis
Also see Points chapter.
conjunct
meta
usage
supertypes
| marker |
Marker labels a dict with typing information |
|---|---|
| entity |
Top-level dicts with a unique identifier |
| point |
Data point such as a sensor or actuator |
tags
| cur |
Supports current value |
|---|---|
| dis |
Display name for an entity |
| enum |
Defines an eumeration of string key names |
| equipRef |
Reference to equip which contains this entity |
| his |
Supports historization of data |
| hisErr |
Error description when |
| hisMode |
Indicates the way that history data is collected for a point |
| hisStatus |
Status of point's history collection or synchronization |
| hisTotalized |
Indicates values which are a continuous stream of totalization |
| id |
Defines the unique identifier of an entity in system using a |
| kind |
Kind name used to identity a value data type |
| maxVal |
Inclusive maximum for a numeric value |
| minVal |
Inclusive minimum for a numeric value |
| pointFunction |
Classifies the point as a sensor, command, or setpoint |
| pointQuantity |
Quantity the point senses or controls |
| pointSubject |
What the point senses or controls |
| siteRef |
Reference to site which contains the entity |
| spaceRef |
Reference to space which contains this entity |
| systemRef |
Reference to system |
| tz |
Timezone identifier from standard timezone database |
| unit |
Unit identifier from standard unit database |
| writable |
Supports writing data |