Mitsubishi Electric MELSEC IQ-R series Reference Manual page 203

Path name
Specify the absolute path by UTF-16 from the root folder.
"Drive name:\" is not required in front of the path. Use '\' (005CH) for the delimiter between the folder names.
■Data communication in ASCII code
Convert the numerical value of UTF-16, which indicates a path character string, to ASCII code (hexadecimal), and send it
from the upper digits.
■Data communication in binary code
Send the numerical value of UTF-16 indicating the path character string from lower bytes (L: bits 0 to 7).
Ex.
12
Folder root folder 'A'
(UTF-16: 'A'= 0041)
ASCII code Binary code
0 0 4 1
30 30 34 31 41 00
H H H H H H
12 FILE CONTROL
201
12.3 Data to be specified in commands