ManualDiscreteHistory
- Last UpdatedMar 18, 2021
- 1 minute read
This table can be used by custom client applications to store values for discrete tags. By default, this table is empty. If written to by a client application, this table will contain one row for each defined discrete tag per sample period. ManualDiscreteHistory is a normal SQL Server table and does not support any of the AVEVA Historian extensions for handling data.
|
Column |
Data type |
Description |
|---|---|---|
|
(PK) DateTime |
datetime2(7) NOT NULL |
The timestamp reflecting when the data was acquired or stored. |
|
(PK) TagName |
TagNameType(nvarchar(256)) NOT NULL |
The unique name of the tag within the AVEVA Historian system. |
|
Value |
tinyint NULL |
The value of the discrete tag at timestamp. 0 = FALSE; 1 = TRUE; NULL = No data. |
|
Quality |
tinyint NOT NULL |
The basic data quality indicator associated with the data value. |
|
QualityDetail |
int NULL |
An internal representation of data quality. |
|
wwTagKey |
int NOT NULL |
The unique numerical identifier of a tag within a single AVEVA Historian. |