This ObjectType is a subtype of the TemporaryFileTransferType defined in OPC 10000-5 and is used to transfer result data as a file.

The ResultTransferType overwrites the Method GenerateFileForRead to specify the concrete type of the generateOptions Parameter of the Methods. It does not specialize the GenerateFileForWrite method of the base type as results are supposed to be only generated by the vision system, not received.

Figure 19 shows the hierarchical structure and details of the composition. It is formally defined in Table 75.

image026.png

Figure 19 – Overview ResultTransferType

Table 75 – Definition of ResultTransferType

Attribute

Value

BrowseName

ResultTransferType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

Subtype of the TemporaryFileTransferType defined in OPC 10000-5

HasComponent

Method

0:GenerateFileForRead

--

--

Mandatory

This method is used to start the read file transaction. A successful call of this method creates a temporary FileType Object with the file content and returns the NodeId of this Object and the file handle to access the Object.

Signature

GenerateFileForRead ([in]ResultTransferOptionsgenerateOptions[out]NodeIdfileNodeId[out]UInt32fileHandle[out]NodeIdcompletionStateMachine);

Table 76 – GenerateFileForRead Method Arguments

Argument

Description

generateOptions

The structure used to define the generate options for the file.

fileNodeId

NodeId of the temporary file

fileHandle

The FileHandle of the opened TransferFile.

The FileHandle can be used to access the TransferFile methods Read and Close.

completionStateMachine

If the creation of the file is completed asynchronously, the parameter returns the NodeId of the corresponding FileTransferStateMachineType Object.

If the creation of the file is already completed, the parameter is null.

If a FileTransferStateMachineType object NodeId is returned, the Read Method of the file fails until the TransferState changed to ReadTransfer.

Table 77 – GenerateFileForRead Method AddressSpace Definition

Attribute

Value

BrowseName

GenerateFileForRead

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

HasProperty

Variable

InputArguments

Argument[]

PropertyType

Mandatory

HasProperty

Variable

OutputArguments

Argument[]

PropertyType

Mandatory