You can use the fields in the No Change section on a counter-type Point Form to specify whether Geo SCADA Expert should raise an alarm or log an event if a point’s value stops changing.
For instance, you might want Geo SCADA Expert to raise an alarm if a particular point’s value doesn’t change by a specified minimum amount for a defined period of time.
For information on configuring the No Change properties and examples showing how these properties might be configured, see Detect Whether a Point Value has Stopped Changing.
ATTENTION: With many protocols, in order to use the No Change feature on points that are on PSTN outstations, you need to ensure that Geo SCADA Expert is configured to raise Alarms FromLogged Data Only, or Most Recent Logged Data. With these options the current value reported at the beginning of a call does not inadvertently generate a No Change alarm or event. (For more information, see the Geo SCADA Expert Guide to Advanced Drivers.)