UA Part 20: File Transfer

4.2.5 Write

Write is used to write a part of the file starting from the current file position. The file position is advanced by the number of bytes written.

Signature

Write(

[in] UInt32 fileHandle

[in] ByteString data

);

Argument	Description
fileHandle	A handle indicating the access request and thus indirectly the position inside the file.
data	Contains the data to be written at the position of the file. It is server-dependent whether the written data are persistently stored if the session is ended without calling the Close Method with the fileHandle. Writing an empty or null ByteStringreturns a Good result code without any affect on the file.

Method Result Codes (defined in Call Service)

Result Code	Description
Bad_InvalidArgument	See OPC 10000-4for a general description. Invalid file handle in call.
Bad_NotWritable	See OPC 10000-4for a general description. File might be locked and thus not writable.
Bad_InvalidState	See OPC 10000-4for a general description. File was not opened for write access.

Table 5specifies the AddressSpacerepresentation for the Write Method.

Table 5– Write Method AddressSpace definition