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Reference

OpcClientInterfaces Members

Defines additional options to be used for the different interfaces consumed by the OpcClient.

Reference

OpcClientInterfaces Members ​

Type
OpcClientInterfaces
Namespace
Opc.UaFx.Client
Assembly
Opc.UaFx.Advanced.dll
Package
Opc.UaFx.Advanced v2.59.0

Properties ​

DataAccess ​

Gets an instance which can be used to configure the communication with the data access layer.

csharp
public OpcClassicDataAccessOptions DataAccess { get; }
vbnet
Public ReadOnly Property DataAccess As OpcClassicDataAccessOptions

Property value

OpcClassicDataAccessOptions

An instance of the OpcClassicDataAccessOptions class.

UseBreakMonitoring ​

since v2.29

Gets or sets a value that indicates whether the connection with the OPC Classic server is monitored for breaks (in case of DCOM connections).

csharp
public bool UseBreakMonitoring { get; set; }
vbnet
Public Property UseBreakMonitoring As Boolean

Property value

Boolean

true to enable break monitoring, false to disable it. The default value is false.

Remarks

By enabling this option, the DCOM connection state to the OPC Classic server will be replicated on the OpcClient instance (by temporarily stopping the UA wrapper server), so that State indicates the current connection state.

A connection break is detected by calling IOPCServer.GetStatus() and checking for HResult 0x800706BA (Win32 error RPC_S_SERVER_UNAVAILABLE). In that case, the UA Wrapper Server will stop, so that the OpcClient's state will change in order to indicate a connection loss. Once a new, functional instance of the OPC Classic server can be created, the wrapper server will start again.

The mechanism is disabled by default because it requires to create a second instance of the COM object for the OPC Classic server (in addition to the one created by the UA Wrapper server), which could have unintended side effects on some servers.