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:
def | his-point |
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doc | See above |
is | point |
lib | phIoT |
pointFunction | pointFunctionType |
pointQuantity | quantity |
pointSubject | phenomenon |
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 |
cur |
Supports current value |
---|---|
dis |
Display name for an entity |
enum |
Defines an eumeration of string keys |
equipRef |
Reference to equip which contains this entity |
his |
Supports historization of data |
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 |
id |
Defines the unique identifier of an entity in system using a Ref value type |
kind |
Kind name used before Haystack 4.0 to identity data types |
maxVal |
Inclusive minimum for a numeric value |
minVal |
Inclusive maximum for a numeric value |
siteRef |
Reference to site which contains the entity |
spaceRef |
Reference to space which contains this entity |
tz |
Timezone identifier from standard timezone database |
unit |
Unit identifier from standard unit database |
writable |
Supports writing data |