App - 3 App - 3
MELSEC-Q
APPENDIX
Appendix 1.3 File Name
A file name is a name given to individual programs or data files in a memory card, FD,
or HD.
A file name is further divided into a file name and an extension. Any name can be used
as long as it conforms to the following conventions.
Distinction between a name and extension of a file
Separate a name and extension of a file using a period as follows:
File name
Extension
Characters that can be used
Alphabet (A to Z, a to z)
Numbers (0 to 9)
Kana (@@@@@)
Kanji (JIS level 1 standard Kanji and non-Kanji)
Certain symbols (!, #, $, %, &, ‘, (,), -, @, ^, _, {, }, ~)
Number of characters that can be used
Name
Extension
8 characters or less.
3 characters or less. Note that each Kanji character is counted as two
characters.
File names and extensions that cannot be used
The following words have special meanings and therefore cannot be used.
AUX, CLOCK, CON, NUL, PRN, BAT, COM, EXE
However, these words can be used as a part of a file name.
Example
AUX X
AUXNO
TOAUX
TOAUXNO
A file name must be unique within the same system name.
