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MaxH - property of the ExtAlarmAnalog object

Description:
Hysteresis value of the upper limits 1 and 2.
Syntax:
Double MaxH
Note:
Property access for read and write. The preset value of this property is defined in the "Hysteresis for upper limits" configurator of this object.
 
The hysteresis prevents repeated triggering of alarm if the value oscilates around the corresponding limit.The hysteresis prevents repeated triggering of alarm if the value oscilates around the corresponding limit. There are exactly defined limit values of corresponding Max1 and Max2 that trigger the alarm. The alarm is triggered once the measured value exceeds the limits Max1 or Max2 by the value of defined hysteresis. Therefore the limits for alarms to start are Max2 and Max1, and for alarms to stop are Max2+MaxH and Max1+MaxH.
See also:
Example1:
Examples of obtaining this property in the script.
JavaScriptVBScriptSelect and copy to clipboard

value = pMe.Pm("/data/#vars/Temperature/#ext/al").MaxH;

//or
value = pMe.Pm("/data/#vars/Temperature").Extension("al").MaxH;

//or
value = pMe.Pm("/data").Item("Temperature").Extension("al").MaxH;
Example2:
The example of obtaining this property by Macro expression from another data extension via pVar variable.

History:
Pm9.00.15: Created
PROMOTIC 9.0.15 SCADA system documentation - MICROSYS, spol. s r.o.

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