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Macro Reference
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Vision System FH/FZ5 Series
User’s Manual (Z340)
Open For Output As#
Opens the file in writing mode.
Format
Open <fileName> For Output As #<fileNo>
Parameter
Return value
None.
Description
Assigns the specified file number in the <fileNo> parameter to the specified file by the <fileName> parameter
and open the file in writing mode.
Be sure to execute the Close function to close the file opended with this macro function within the same
subroutine. File accessing processes such as data writing to a file and data reading from a file may not be
completed properly in the following cases.
• The Close function is not executed.
• The Close function is used in a different subroutine from where this macro function is executed.
• This macro function is executed at a different timing from the Open function execution.
In the <fileName> parameter, use an absolute path to specify the file name of the file to be opened.
If the file of the file name specified in the <fileName> parameter does not exist, an "Illegal function call" error
will occur.
If the file of the file name specified in the <fileName> parameter already exists, the existing file content is
once deleted, then opens the existing file so that the writing in the file is possible.
If a value outside the range of 0 to 15 is specified in the <fileNo> parameter, an "Illegal function call" error will
occur.
If a value outside the range -2147483648 to 2147483647 is specified as an integer parameter, an "Overflow"
error will occur.
If an incorrect data type is specified for a parameter, a "Type mismatch" error will occur.
If a character string longer than 255 characters is specified for a character string parameter, a "String too
long" error will occur.
If the format is written incorrectly, such as writing the macro function name incorrectly, omitting a comma, or
omitting a half-width space, a "Syntax error" error will occur.
Usage Cautions
• None.
Parameter
name
Data type
Description
<fileName>
Character
string type
Absolute path of the file to be opened
<fileNo>
Integer type
Assigned file number (0 to 15) to the opened file
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