Use the fields within the Alarm Limits section of the Analog Point tab to set limits for a DNP3 analog point and specify whether an
Many of the Alarm Limit fields are common to various types of analog points (see Configure the Limits for an Analog Point in the Geo SCADA Expert Guide to Core Point Configuration). In addition to the usual Limits, DNP3 analog points also have an Invalid state. Use the fields associated with this state to define the properties should the analog to digital conversion process fail in the outstation.
The Alarm Limits section of the tab also includes these fields:
- Hysteresis—Use to Specify the Hysteresis - the Minimum Value Change that can Clear an Alarm.
- Engineering Units Exceeded—Use to Define how Over Range and Under Range Values are Processed.
- Out of Range Check—Use to Specify how the Driver Determines whether a Reported Value is Out of Range.
- Persistence Type—Use Persistence to Stop Fleeting Changes in Value from Changing a Point State.
- Tune Limits—Use to Define whether an Analog Point’s Limits can be Tuned.
- Area of Interest—This field is only displayed if the Area of Interest feature is enabled on your system. Use the field to specify the Area of Interest with which any state-related point alarms or events are to be associated (see Specify the Area of Interest Associated with a Point’s State-Related Alarms and Events).