Mitsubishi Electric Melsec Q Series User Manual page 147

5 WHEN USING FILE TRANSFER FUNCTIONS (FTP SERVER)
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(5) Precautions when writing a file
1) Operation to overwrite an existing file cannot be performed.
Either delete corresponding file using the file delete command (delete, mdelete),
or change the file name using rename command before the file is written.
2) The program file set in the parameter file currently used for the Q/LCPU
operation cannot be written.
Set the Q/LCPU to the STOP status, then write the file.
3) File transmission (attributes change, file write, etc.) for file write can only be
conducted for the Q/LCPU program memory or the RAM area of the memory
card or SD memory card.
4) Check the number of files that can be registered to the drive for the files to be stored.
File write cannot be performed to a drive where the number of files has
already reached the allowed number of registered files.
The files are stored in the designated drive's cluster size units.
5) Any drives which fit in the size of the continuous unused clusters in the
designated drive memory can be written.
6) To restart the Q/LCPU operation after writing a file, it is recommended to set
the switch of the Q/LCPU to RUN.
The status of the Q/LCPU can be changed from STOP to RUN with the FTP
command, however, pay full attention to the operation of the programmable
controller system.
7) When writing files, the Ethernet module creates temporary work files
(FTP_Ixxx.TMP) in the Q/LCPU.
The temporary files are automatically created in the designated drive during
the file write (put or mput), and the file name is changed to the designated file
name after the operation is completed.
The "xxx" in the temporary file name "FTP_Ixxx.TMP" is the upper three
digits of the four digits representing the Ethernet module's I/O signals from
the Q/LCPU.
The temporary file is automatically deleted when the file write is
successfully completed, line is shut down during transfer, or a file capacity
error occurs with the Q/LCPU.
8) The temporary work file may remain in the designated drive when the
Q/LCPU power is disconnected or reset during the file write.
When the temporary file remains in the drive, delete the file using the FTP
command.
9) When file deletion and file writing are repeated while the Q/LCPU is in RUN
status, the file size must be fixed in advance.
If a file is deleted and writing of another file larger than the deleted one is
attempted, a 402B error will occur disabling the file writing.
MELSEC-Q/L
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