OpcAnalogItemNode Members

Initializes a new instance of the OpcAnalogItemNode class accessible by the name specified as a child node of the parent node given.

C#

public OpcAnalogItemNode(IOpcNode parent, OpcName name)

Parameters

parent IOpcNode

The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.

name OpcName

The OpcName through that the new analog item node can be accessed.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name specified with the initial value defined by value as a child node of the parent node given.

C#

public OpcAnalogItemNode(IOpcNode parent, OpcName name, object value)

Parameters

parent IOpcNode

The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.

name OpcName

The OpcName through that the new analog item node can be accessed.

value Object

The initial value of the new analog item node.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name and id specified as a child node of the parent node given.

C#

public OpcAnalogItemNode(IOpcNode parent, OpcName name, OpcNodeId id)

Parameters

parent IOpcNode

The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.

name OpcName

The OpcName through that the new analog item node can be accessed.

id OpcNodeId

The OpcNodeId through that the new analog item node can be identified and accessed.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name and id specified with the initial value defined by value as a child node of the parent node given.

C#

public OpcAnalogItemNode(IOpcNode parent, OpcName name, OpcNodeId id, object value)

Parameters

parent IOpcNode

The IOpcNode used as the parent node or a null reference (Nothing in Visual Basic) in the case there is no parent node available.

name OpcName

The OpcName through that the new analog item node can be accessed.

id OpcNodeId

The OpcNodeId through that the new analog item node can be identified and accessed.

value Object

The initial value of the new analog item node.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name specified.

C#

public OpcAnalogItemNode(OpcName name)

Parameters

name OpcName

The OpcName through that the new analog item node can be accessed.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name specified with the initial value given by value.

C#

public OpcAnalogItemNode(OpcName name, object value)

Parameters

name OpcName

The OpcName through that the new analog item node can be accessed.

value Object

The initial value of the new analog item node.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name and id specified.

C#

public OpcAnalogItemNode(OpcName name, OpcNodeId id)

Parameters

name OpcName

The OpcName through that the new analog item node can be accessed.

id OpcNodeId

The OpcNodeId through that the new analog item node can be identified and accessed.

Initializes a new instance of the OpcAnalogItemNode class accessible by the name and id specified with the initial value given by value.

C#

public OpcAnalogItemNode(OpcName name, OpcNodeId id, object value)

Parameters

name OpcName

The OpcName through that the new analog item node can be accessed.

id OpcNodeId

The OpcNodeId through that the new analog item node can be identified and accessed.

value Object

The initial value of the new analog item node.

Gets the default identifier which identifies the node that defines the underlying node type from that this OpcInstanceNode has been created.

C#

protected override OpcNodeId DefaultTypeDefinitionId { get; }

Property Value

OpcNodeId

The OpcNodeId of the type node from that this OpcInstanceNode has been created from. These type node defines the typical structure of an instance node of its type definition. If there exists no specific type definition node a null reference (Nothing in Visual Basic).

Gets or sets the engineering unit information which specifies the unit of the value attribute of the OpcAnalogItemNode.

C#

public OpcEngineeringUnitInfo EngineeringUnit { get; set; }

Property Value

OpcEngineeringUnitInfo

An instance of the OpcEngineeringUnitInfo class which provides the information of the unit used to scale the value attribute of the OpcAnalogItemNode.

Remarks

Understanding the units of a measurement value is essential for a uniform system. In an open system in particular where servers from different cultures might be used, it is essential to know what the units of measurement are. Based on such knowledge, values can be converted if necessary before being used. Therefore, although defined as optional, support of the EngineeringUnit property is strongly advised.

Gets the OpcEngineeringUnitInfoPropertyNode of the EngineeringUnit property.

C#

public OpcEngineeringUnitInfoPropertyNode EngineeringUnitNode { get; }

Property Value

OpcEngineeringUnitInfoPropertyNode

An instance of the OpcEngineeringUnitInfoPropertyNode class.

Gets or sets the range information which applies to normal operation.

C#

public OpcValueRange EngineeringUnitRange { get; set; }

Property Value

OpcValueRange

An instance of the OpcValueRange class which provides the range information of the value attribute in normal operation. This information is intended for such use as automatically scaling a bar graph display.

Remarks

Sensor or instrument failure or deactivation can result in a returned item value which is actually outside of this range. Clients must be prepared to deal with this possibility. Similarly a Client may attempt to write a value that is outside of this range back to the Server. The exact behaviour (accept, reject, clamp, etc.) in this case is Server-dependent. However, in general Server shall be prepared to handle this.

Gets the OpcValueRangePropertyNode of the EngineeringUnitRange property.

C#

public OpcValueRangePropertyNode EngineeringUnitRangeNode { get; }

Property Value

OpcValueRangePropertyNode

An instance of the OpcValueRangePropertyNode class.

Gets or sets the range information which applies to the instrumental values returned by the instrument.

C#

public OpcValueRange InstrumentRange { get; set; }

Property Value

OpcValueRange

An instance of the OpcValueRange class which provides the range information about the values provided by the unterlaying senor or instrument used to determine the value of the OpcAnalogItemNode.

Remarks

Although defined as optional, it is strongly recommended for Servers to support this property. Without an InstrumentRange being provided, Clients will commonly assume the full range according to the DataType of the OpcAnalogItemNode.

Gets the OpcValueRangePropertyNode of the InstrumentRange property.

C#

public OpcValueRangePropertyNode InstrumentRangeNode { get; }

Property Value

OpcValueRangePropertyNode

An instance of the OpcValueRangePropertyNode class.