Please ensure Javascript is enabled for purposes of website accessibility
Powered by Zoomin Software. For more details please contactZoomin

Historian SDK

TABLE OF CONTENTS

Integral Property

Save PDF
Save selected topicSave selected topic and subtopicsSave all topics
Share
Share to emailCopy topic URL
Gets or sets the area under value curve of retrieval cycle.

Syntax

'Declaration
 
Public Property Integral As Double
'Usage
 
Dim instance As AnalogSummaryQueryResult
Dim value As Double
 
instance.Integral = value
 
value = instance.Integral
public double Integral {get; set;}
public:
property double Integral {
   double get();
   void set (    double value);
}

Remarks

The calculation is:

Sum(value * delta t) / Total time of integral in all cycles

For analog tags, the calculation is:

Sum(value * delta t) / Total time

Delta t is prorated for any partially contained storage cycles.

This is like the values returned by an Integral query against the History table for a cycle of the same length, where the History row DateTime is the same as the EndDateTime here.

For analog tags, similar Integral values are produced for each cycle.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

AnalogSummaryQueryResult Class
AnalogSummaryQueryResult Members

In This Topic