SummaryTagList
- Last UpdatedMar 10, 2025
- 1 minute read
Contains one row for each combination of a summarized tag and a specific summary operation. This table is used by the Event subsystem; it is not used by the Replication subsystem. This table is a linking table that allows tags to be associated with a type of operation.
|
Column |
Data Type |
Description |
|---|---|---|
|
(PK) SumVarKey |
int NOT NULL |
The unique numerical identifier for a summarized tag. This value is automatically generated by the system when the summarized tag is added. |
|
(FK) TagName |
TagNameType |
The unique name of the tag within the AVEVA Historian system. TagName is a foreign key from the Tag table. |
|
(FK) OperationKey |
int NOT NULL |
The unique numerical identifier for the summary operation. OperationKey is a foreign key from the SummaryOperation table. |
|
LowerLimit |
float NULL |
The lower limit of validity for the tag's value. Values lower than this limit are not used in the calculation. By default, this value is set to ‑1000000000. |
|
UpperLimit |
float NULL |
The upper limit of validity for the tag's value. Values higher than this limit are not used in the calculation. By default, this value is set to 1000000000. |
|
Description |
nvarchar(50) NULL |
The description of the summarized tag. This normally describes the result of the operation, although this description can be the same as that of the tag on which the operation is performed. |