Mitsubishi MELSEC Q Series Reference Manual page 239

Check for file presence
Register file name and reserve size in
memory
Prohibit access from other devices
(prohibit file content modification)
Allow access from other devices
(allow file content modification)
Modify date and time of file creation
Check the file number of the created
file only when creating a new file
3 - 179
3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(2) Procedure for creating a new file and writing data to it
Start
Write data
Complete
POINT
(1) Each file to be stored in the Q/LCPU is stored in a contiguous area in the
program area (memory).
In order to avoid a situation where there is insufficient free space when an
external device creates a new file, reserve a contiguous area larger than the
necessary size by taking either of the following actions using the
programming tool before operating the Q/LCPU.
1) Delete any unnecessary files
2) Arrange PLC memory
(2) Refer to Section 3.8.2 for creating a new file of Q/LCPU.
(Function name)
Read directory/file
information or File search
(checking file presence)
Create new file
Open file
Write to file
Close file
Modify file information
File search
(checking file presence)
(Command) (Reference section)
1810
Section 3.8.5
Section 3.8.6
1811
Section 3.8.10
1820
Section 3.8.7
1827
Section 3.8.11
1829
Section 3.8.8
182A
Section 3.8.14
1826
Section 3.8.6
1811
3- 179