CommonMappingSource Class

A mapping source for OPC "Classic" specifications.

Object Model

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ComVisibleAttribute(False)>
<CLSCompliantAttribute(True)>
<TypeConverterAttribute(System.ComponentModel.ExpandableObjectConverter)>
Public MustInherit Class CommonMappingSource 
   Inherits OpcLabs.BaseLib.LiveMapping.AbstractMappingSource

'Usage
 
Dim instance As CommonMappingSource

[ComVisible(false)]
[CLSCompliant(true)]
[TypeConverter(System.ComponentModel.ExpandableObjectConverter)]
public abstract class CommonMappingSource : OpcLabs.BaseLib.LiveMapping.AbstractMappingSource

[ComVisible(false)]
[CLSCompliant(true)]
[TypeConverter(System.ComponentModel.ExpandableObjectConverter)]
public ref class CommonMappingSource abstract : public OpcLabs.BaseLib.LiveMapping.AbstractMappingSource

Remarks

The mapping source is a data provider and/or consumer external to your application code.

For OPC Data Access, there are two types of mapping sources that you can use:

The DAClientItemSource represents an OPC item.
The DAClientPropertySource represents an OPC property.

For OPC Unified Architecture, following type of mapping source exists:

The UAClientDataMappingSource represents an attribute of an OPC-UA node.

One mapping source can be (and often is) shared by multiple mappings. This happens e.g. when you map multiple members to the same source, using different Mapping Kinds (for example, you may map separate members to the value, timestamp, and quality information of the OPC item).

When you use the attributes to define the live mappings, mapping source objects are created and maintained together with their Mappings, so normally you do not deal with them directly.

Inheritance Hierarchy

System.Object
   OpcLabs.BaseLib.LiveMapping.AbstractMappingSource
      OpcLabs.EasyOpc.LiveMapping.CommonMappingSource
         OpcLabs.EasyOpc.DataAccess.LiveMapping.DAMappingSource

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012, Windows Server 2016; .NET Core, .NET 5, .NET 6: Linux, macOS, Microsoft Windows

Reference

CommonMappingSource Members
OpcLabs.EasyOpc.LiveMapping Namespace