IOpcWriteNodesService Members

Gets or sets the maximum number of nodes which shall be written using a single write request. This number indirectly defines the number of requests used to send a specific number of write requests to the server.

C#

uint? MaxNodesPerWrite { get; set; }

Property Value

Nullable<UInt32>

The absolute number of write commands which shall be send to the server per request or a null reference (Nothing in Visual Basic). In case there a specific number of nodes is used, a request with more commands as the MaxNodesPerWrite is partitioned into multiple requests and the responses of them are accumulated. The default value of this property is a null reference (Nothing in Visual Basic) and means that all commands defined are send to the server using the server defined number of nodes per write request.

Gets or sets the OpcTimestampSource to use to prepare OpcValue timestamp values before sending a write request to a server.

C#

OpcTimestampSource? TimestampSource { get; set; }

Property Value

Nullable<OpcTimestampSource>

One of the members defined by the OpcTimestampSource enumeration; otherwise a null reference (Nothing in Visual Basic). In case there the value is null reference (Nothing in Visual Basic) there will be tried to automatically determine the timestamp sourcing to match the needs of the server. The default value of this property is a null reference (Nothing in Visual Basic).

Gets the maximum number of nodes which are written using a single write request. This property will use either the MaxNodesPerWrite or the maximum number of nodes which can be written in one request as defined by the server. The lowest number of nodes is used to partition the commands to execute into multiple write requests.

C#

uint? UsedMaxNodesPerWrite { get; }

Property Value

Nullable<UInt32>

In case there has already been one write attempt (with more than one write command) the definite number of commands per write request; otherwise a null reference (Nothing in Visual Basic).

Gets the OpcTimestampSource currently used to prepare OpcValue timestamp values before sending a write request to a server. In case there TimestampSource is a null reference (Nothing in Visual Basic) this property will define the OpcTimestampSource automatically determined during the first write attempt which does write an OpcValue of the Value attribute.

C#

OpcTimestampSource? UsedTimestampSource { get; }

Property Value

Nullable<OpcTimestampSource>

In case there has already been one write attempt to a Value attribute the definite timestamp source; otherwise a null reference (Nothing in Visual Basic).

Writes one or more values to one or more attributes of one or more nodes using the specified commands.

C#

OpcStatusCollection WriteNodes(IEnumerable<OpcWriteNode> commands)

Parameters

commands IEnumerable<OpcWriteNode>

A sequence of OpcWriteNode instances to process.

Returns

OpcStatusCollection

An instance of the OpcStatusCollection its number and order of items matches the number and order of items in the commands sequence. There is for each command one entry which indicates the outcome of the operation for that command.

Exceptions

ArgumentNullException

The commands sequence or one of its items is a null reference (Nothing in Visual Basic).

InvalidOperationException

The write service is currently not supported, especially using the commands specified.

OpcException

The service execution failed upon different circumstances; for more details see exception details. The following issues can lead to that exception: BadNothingToDo and BadTooManyOperations.

Remarks

Known results for the commands specified are:

Writes one or more values to one or more attributes of one or more nodes using the specified commands.

C#

OpcStatusCollection WriteNodes(params OpcWriteNode[] commands)

Parameters

commands OpcWriteNode[]

An array of OpcWriteNode instances to process.

Returns

OpcStatusCollection

An instance of the OpcStatusCollection its number and order of items matches the number and order of items in the commands. There is for each command one entry which indicates the outcome of the operation for that command.

Exceptions

ArgumentNullException

The commands array or one of its items is a null reference (Nothing in Visual Basic).

InvalidOperationException

The write service is currently not supported, especially using the commands specified.

OpcException

The service execution failed upon different circumstances; for more details see exception details. The following issues can lead to that exception: BadNothingToDo and BadTooManyOperations.

Remarks

Known results for the commands specified are: