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 curVal to 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

conjunct

his

Related to historization of data

point

Data point such as a sensor or actuator

meta

supertypes

marker

Marker labels a dict with typing information

tags

hisErr

Error description when hisStatus indicates error condition

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