QuickOPC User's Guide and Reference
DAAutoSubscribingParameters Class Members
Fields  Properties  Methods 


OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess.Optimization Namespace : DAAutoSubscribingParameters Class

The following tables list the members exposed by DAAutoSubscribingParameters.

Public Constructors
 NameDescription
Public ConstructorDAAutoSubscribingParameters ConstructorOverloaded. Initializes a new instance of the class.  
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Public Fields
 NameDescription
Public FieldDefaultAbandonIntervalMinimumDefault value of the AbandonIntervalMinimum property.  
Public FieldDefaultAbandonRateMultiplierDefault value of the AbandonRateMultiplier property.  
Public FieldDefaultAutoAdjustmentPeriodDefault value of the AutoAdjustmentPeriod property.  
Public FieldDefaultFastestAutomaticUpdateRateDefault value of the FastestAutomaticUpdateRate property.  
Public FieldDefaultMaximumEffectiveValueAgeDefault value of the MaximumEffectiveValueAge property.  
Public FieldDefaultMinimumEffectiveValueAgeDefault value of the MinimumEffectiveValueAge property.  
Public FieldDefaultReadIntervalAggregateMinimumValuesDefault value of the ReadIntervalAggregateMinimumValues property.  
Public FieldDefaultReadIntervalAggregateWindowSizeDefault value of the ReadIntervalAggregateWindowSize property.  
Public FieldDefaultRequestedUpdateRateFactorDefault value of the RequestedUpdateRateFactor property.  
Public FieldDefaultSlowestAutomaticUpdateRateDefault value of the SlowestAutomaticUpdateRate property.  
Public FieldDefaultUpdateRateNegativeHysteresisDefault value of the UpdateRateNegativeHysteresis property.  
Public FieldDefaultUpdateRatePositiveHysteresisDefault value of the UpdateRatePositiveHysteresis property.  
Public FieldDefaultValueAgeAggregateMinimumValuesDefault value of the ValueAgeAggregateMinimumValues property.  
Public FieldDefaultValueAgeAggregateWindowSizeDefault value of the ValueAgeAggregateWindowSize property.  
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Public Properties
 NameDescription
Public PropertyAbandonIntervalMinimumAbandon interval minimum. Number of milliseconds. The OPC item is considered "abandoned" if no read requests to it have been made for abandon interval. In such case it is unsubscribed. The abandon interval is computed using the aggregated read rate and AbandonRateMultiplier, but it is never shorter than value of this property.  
Public PropertyAbandonRateMultiplierAbandon rate multiplier. Must be greater than or equal to 1.0. The OPC item is considered "abandoned" if no read requests to it have been made for abandon interval. In such case it is unsubscribed. The abandon interval is computed by multiplying the aggregated read rate and the value of this property, but it is never shorter than AbandonIntervalMinimum.  
Public PropertyAutoAdjustmentPeriodAuto adjustment period. Number of milliseconds. Specifies how often the engine automatically adjusts the parameters (such as update rate) of OPC items to match the observed usage pattern (e.g. the frequency of reading the item).  
Public Propertystatic (Shared in Visual Basic)DefaultDefault OPC-DA auto-subscribing parameters.  
Public PropertyFastestAutomaticUpdateRateFastest automatic update rate. Number of milliseconds. When the system automatically modifies the update rate of an OPC item, it never chooses a rate that is faster (has lower value) than the value of this property.  
Public PropertyMaximumEffectiveValueAgeThe maximum effective value age in the Read request for it to be considered in auto-subscribing.  
Public PropertyMinimumEffectiveValueAgeThe minimum effective value age in the Read request for it to be considered in auto-subscribing.  
Public PropertyReadIntervalAggregateMinimumValuesThe minimum count of data values in the read interval aggregate.  
Public PropertyReadIntervalAggregateWindowSizeThe size of the window use by the read interval aggregate.  
Public PropertyRequestedUpdateRateFactorThe factor used to calculate the requested update rate from the value age aggregate.  
Public PropertySlowestAutomaticUpdateRateSlowest automatic update rate. Number of milliseconds. When the system automatically modifies the update rate of an OPC item, it never chooses a rate that is slower (has higher value) than the value of this property.  
Public PropertyStandardNameA symbolic name of the current parameter combination if it has a standard name. Empty otherwise. (Inherited from OpcLabs.BaseLib.Parameters)
Public PropertyUpdateRateNegativeHysteresisHysteresis for negative update rate changes. In percent, between 0.0 and 100.0. Requests to make the update rate of OPC item faster (i.e. lower value) will be ignored if the percentual change in update rate value is lower than the value of this property.  
Public PropertyUpdateRatePositiveHysteresisHysteresis for positive update rate changes. In percent, between 0.0 and 100.0. Requests to make the update rate of OPC item slower (i.e. higher value) will be ignored if the percentual change in update rate value is lower than the value of this property.  
Public PropertyValueAgeAggregateMinimumValuesThe minimum count of data values in the value age aggregate.  
Public PropertyValueAgeAggregateWindowSizeThe size of the window use by the value age aggregate.  
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Public Methods
 NameDescription
Public MethodCloneOverridden.   
Public MethodEqualsOverloaded. Overridden. Determines whether the specified object is equal to the current object.Determines whether the specified System.Object is equal to the current object.Determines whether the specified System.Object is equal to the current object.Determines whether the specified System.Object is equal to the current object.  
Public MethodGetHashCodeOverridden. Serves as the default hash function. Serves as a hash function for a particular type. Serves as a hash function for a particular type. Serves as a hash function for a particular type.  
Public MethodGetObjectDataOverridden.   
Public MethodGetSchema (Inherited from OpcLabs.BaseLib.Info)
Public MethodGetTypeGets the System.Type of the current instance. (Inherited from object)
Public MethodReadXml (Inherited from OpcLabs.BaseLib.Info)
Public MethodToStringOverridden. Returns a string that represents the current object.Returns a string that represents the current object.Returns a string that represents the current object.Returns a string that represents the current object.  
Public MethodWriteXml (Inherited from OpcLabs.BaseLib.Info)
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Protected Methods
 NameDescription
Protected MethodCopyFromInfrastructure. Copies data from the specified parameter object into the current parameter object. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object)
Protected MethodGetDefaultStandardNameIndicates the standard name for the default combination of parameters. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodGetStandardNameValuesReturns a collection of standard values for the OpcLabs.BaseLib.Parameters.StandardName property. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodMakeStringInfrastructure. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodMemberwiseCloneCreates a shallow copy of the current System.Object. (Inherited from object)
Protected MethodReadXmlElementOverridden. Infrastructure. Infrastructure.  
Protected MethodWriteXmlElementOverridden. Infrastructure. Infrastructure.  
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Public Operators
public Operator Equality Determines whether the two objects are equal.
public Operator Inequality Determines whether the two objects are not equal.
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See Also

Reference

DAAutoSubscribingParameters Class
OpcLabs.EasyOpc.DataAccess.Optimization Namespace

 

 

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