RateOfChange
- Last UpdatedMar 10, 2025
- 1 minute read
Contains one row for each monitored rate of change for a tag.
|
Column |
Data Type |
Description |
|---|---|---|
|
(PK) (FK) TagName |
nvarchar(256) NOT NULL |
The unique name of the tag within the AVEVA Historian system. TagName is a foreign key from the Tag table. |
|
(PK) (FK) ContextKey |
int NOT NULL |
The unique numerical identifier for the context. ContextKey is a foreign key from the Context table. |
|
Value |
float NOT NULL |
The percentage of change for a tag during the amount of time specified by the time base. |
|
TimeBase |
int NOT NULL |
The unit of time against which the rate of change will be measured. |
|
Priority |
int NOT NULL |
The priority for the rate of change. Priorities can range from 1 to over 2 billion, with 1 being the highest priority. |
|
Checked |
bit NOT NULL |
Used to specify whether a tag imported from InTouch was configured for automatic rate of change checking. 0 = Checking disabled; 1 = Checking enabled. |