Denso BHT-200QW Spezifikationen Seite 248

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File I/O statement
OPEN
Opens a data file for I/O activities.
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Syntax:
Syntax:Syntax:
Syntax:
OPEN "[drivename:]filename" AS [#] filenumber [RECORD filelength]
Parameter:
Parameter:Parameter:
Parameter:
filenumber
A numeric expression which returns a value from 1 to 16.
"[drivename:]filename"
A string expression.
filelength
An integer constant which has the value from 1 to 32767.
Description:
Description:Description:
Description:
OPEN opens a data file specified by "[drivename:]filename" and associates the opened
file with filenumber for allowing I/O activities according to filenumber.
The maximum number of files which can be opened at one time is 16 including the bar
code device file and communications device files.
• "filename" consists of a file name and a file extension.
The file name should be 1 to 8 characters long. Usable characters for the file name
include alphabet letters, numerals, a minus (-) sign, and an underline (_).
Note that a minus sign and underline should not be used for the starting character of
the file name. Uppercase and lowercase alphabet letters are not distinguished from
each other and both are treated as uppercase letters.
The file extension should be up to 3 characters long. It should be other
than .PD3, .EX3, .FN3, and .FLD and may be omitted (together with a period).
a.dat
master01.dat
If you set B: to [drivename], the specified file will be opened as a read-only file; if you
set "A:" or omit [drivename], it will be opened as a read/write file.
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