.NET Based OPC UA Client/Server SDK
3.2.1.522
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This VariableType defines the general characteristics of an AnalogItem. More...
Inherits UnifiedAutomation.UaServer.BaseAnalogModel.
Inherited by UnifiedAutomation.UaServer.AnalogItemModel< T >, and UnifiedAutomation.UaServer.AnalogUnitRangeModel.
Public Member Functions | |
AnalogItemModel () | |
Initializes a new instance of the AnalogItemModel class. More... | |
AnalogItemModel (AnalogItemModel template) | |
Initializes a new instance of the AnalogItemModel class. More... | |
Public Member Functions inherited from UnifiedAutomation.UaServer.BaseAnalogModel | |
BaseAnalogModel () | |
Initializes a new instance of the BaseAnalogModel class. More... | |
BaseAnalogModel (BaseAnalogModel template) | |
Initializes a new instance of the BaseAnalogModel class. More... | |
Public Member Functions inherited from UnifiedAutomation.UaServer.DataItemModel | |
DataItemModel () | |
Initializes a new instance of the DataItemModel class. More... | |
DataItemModel (DataItemModel template) | |
Initializes a new instance of the DataItemModel class. More... | |
Public Member Functions inherited from UnifiedAutomation.UaServer.BaseDataVariableModel | |
BaseDataVariableModel () | |
Initializes a new instance of the BaseDataVariableModel class. More... | |
BaseDataVariableModel (BaseDataVariableModel template) | |
Initializes a new instance of the BaseDataVariableModel class. More... | |
Public Member Functions inherited from UnifiedAutomation.UaServer.BaseVariableModel | |
BaseVariableModel () | |
Initializes a new instance of the BaseVariableModel class. More... | |
BaseVariableModel (BaseVariableModel template) | |
Initializes a new instance of the BaseVariableModel class. More... | |
Public Member Functions inherited from UnifiedAutomation.UaServer.ModelControllerBase | |
virtual ModelHandle | GetModelHandle (StringTable namespaceUris, object instance) |
Gets the metadata handle. More... | |
virtual DataValue | GetValue (IMapperContext context, ModelMapping mapping) |
Gets the value associated with the mapping. More... | |
virtual bool | SetValue (IMapperContext context, ModelMapping mapping, DataValue value) |
Sets the value associated with the mapping. More... | |
Properties | |
new UnifiedAutomation.UaBase.Range | EURange [get, set] |
Defines the value range likely to be obtained in normal operation. More... | |
Properties inherited from UnifiedAutomation.UaServer.BaseAnalogModel | |
EUInformation | EngineeringUnits [get, set] |
Specifies the units for the AnalogItem value (e.g., DEGC, hertz, seconds). More... | |
UnifiedAutomation.UaBase.Range | EURange [get, set] |
Gets or sets the EURange More... | |
UnifiedAutomation.UaBase.Range | InstrumentRange [get, set] |
Defines the value range that can be returned by the instrument. More... | |
Properties inherited from UnifiedAutomation.UaServer.DataItemModel | |
string | Definition [get, set] |
A vendor-specific, human readable string that specifies how the value of this DataItem is calculated. More... | |
double | ValuePrecision [get, set] |
Specifies the maximum precision that the server can maintain for the item based on restrictions in the target environment. More... | |
Properties inherited from UnifiedAutomation.UaServer.BaseVariableModel | |
object | Value [get, set] |
Gets or sets the value. More... | |
Properties inherited from UnifiedAutomation.UaServer.ModelControllerBase | |
ModelHandle | ModelHandle [get, set] |
Gets or sets the metadata handle. More... | |
object | UserData [get, set] |
Gets or sets the user data. More... | |
This VariableType defines the general characteristics of an AnalogItem.
The AnalogItemType derives from the DataItemType.
The StatusCode delivered with the value also contains an informational bit called SemanticsChanged. Servers that implement Data Access shall set this Bit in notifications if EURange (could change the behaviour of a Subscription if a PercentDeadband filter is used) or EngineeringUnits (could create problems if the client uses the value to perform calculations) Properties are changed. Clients that use any of these Properties should re-read them before they process the data value.
In addition a server can send SemanticChangeEvents if the value of the properties EURange and EngineeringUnits are changed. To indicate this capability, the SemanticChange flag must be set in the AccessLevel and UserAccessLevel attributes of this variable.
UnifiedAutomation.UaServer.AnalogItemModel.AnalogItemModel | ( | ) |
Initializes a new instance of the AnalogItemModel class.
UnifiedAutomation.UaServer.AnalogItemModel.AnalogItemModel | ( | AnalogItemModel | template | ) |
Initializes a new instance of the AnalogItemModel class.
template | The template. |
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getset |
Defines the value range likely to be obtained in normal operation.
It is intended for such use as automatically scaling a bar graph display. Sensor or instrument failure or deactivation can result in a returned item value which is actually outside of this range. Client software 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 servers shall be prepared to handle this.
The EURange is also used as base for the calculation of the PercentDeadband.