Mitsubishi Electric MELSEC IQ-R series Reference Manual page 206

File name of MELSEC iQ-R series module (Number of characters and file name)
Use the subcommand '0040'.
Specify the file name including absolute path from the root folder with variable length.
The file name and the extension are specified by inserting a period between them. Specify the length of character string with
"number of characters". (Page 200 Number of characters)
ASCII code
Number of characters
(4 digits)
Specify "Path name" + "Period (002EH)" + "Extension" by Unicode(UTF-16).
"Drive name:\" is not required in front of the path. Use '\' (005CH) for the delimiter between the folder names.
For the characters that cannot be used for a file name and naming rules, refer to the manual of the access target module.
■Data communication in ASCII code
Convert the numerical value of UTF-16, which indicates a file name, to ASCII code (hexadecimal), and send it from the upper
digits.
■Data communication in binary code
Send the numerical value of UTF-16 that indicates file name from the lower byte (L: bits 0 to 7).
Ex.
When the file name and the extension are 'LINE\LINE.CSV' (13 characters)
ASCII code
0 0 0 D
LINE/LINE.CSV
30 30 30 44
H H H H
The value of the file name 'LINE\LINE.CSV' is as follows.
Item Value of code corresponds to character
File name L
UTF-16 004C
ASCII code 3030
3443
Binary code 4C00
12 FILE CONTROL
204
12.3 Data to be specified in commands
Binary code
File name + "." + Extension
(Variable length)
Binary code
I N E \
0049 004E 0045 005C
3030 3030 3030 3030
3439 3445 3435 3543
4900 4E00 4500 5C00
Number of characters File name + "." + Extension
(2 bytes) (Variable length)
LINE/LINE.CSV
0D 00
H H
L I N E
004C 0049 004E 0045
3030 3030 3030 3030
3443 3439 3445 3435
4C00 4900 4E00 4500
. C S V
002E 0043 0053 0056
3030 3030 3030 3030
3245 3433 3533 3536
2E00 4300 5300 5600