Rate-of-change alarm attributes
- Last UpdatedJul 19, 2024
- 1 minute read
If Enable rate of change alarms is enabled, then the following additional scaling alarm-related attributes become available.
|
Editor Option |
Associated Attribute |
Description |
Runtime Access |
|---|---|---|---|
|
Enable rate of change alarms |
ROCAlarmed |
If enabled, alarms will be triggered for when the Field Attribute level reaches configured rates of change. |
None |
|
Up |
ROC.IncreasingHi.Alarmed |
If enabled, an alarm will be triggered when the Field Attribute value is increasing too fast. |
None |
|
Up - Limit |
ROC.IncreasingHi.Limit |
The alarm limit that the rate of change calculation must exceed in order to trigger an alarm. |
Supervisory, User |
|
Up - Priority |
ROC.IncreasingHi.Priority |
Supervisory, User |
|
|
Up - Alarm message |
ROC.IncreasingHi.DescAttrName |
See Alarm field attributes. Click the ellipse button to access the Attribute Browser. |
Supervisory, User |
|
Down |
ROC.DecreasingHi.Alarmed |
If enabled, an alarm will be triggered when the Field Attribute value is decreasing too fast. |
None |
|
Down - Limit |
ROC.DecreasingHi.Limit |
The alarm limit that the rate of change calculation must exceed in order to trigger an alarm. (This value, although a positive value, actually indicates a negative rate of change, or a descending rate of change Hi limit.) |
Supervisory, User |
|
Down - Priority |
ROC.DecreasingHi.Priority |
Supervisory, User |
|
|
Down - Alarm message |
ROC.DecreasingHi.DescAttrName |
See Alarm field attributes. Click the ellipse button to access the Attribute Browser. |
Supervisory, User |
|
Changes per |
ROC.Rate.Units |
The units of time for the rate of change calculation. |
Supervisory, User |
|
Evaluate every |
ROC.EvalPeriod |
The time interval, in milliseconds, at which the rate of change calculation and detection is performed. |
None |