Mitsubishi Electric Melsec Q Series User Manual page 146

5 WHEN USING FILE TRANSFER FUNCTIONS (FTP SERVER)
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(3) Precautions common to any usage of the file transfer functions
(a) For an external device
When a time-out error occurs during file transfer using the FTP function,
the FTP function line is closed (disconnection) regardless of the settings
of the programming tool.
When restarting the file transfer, login to the Ethernet module from the FTP
client again.
(b) For the Q/LCPU
1) If a password is registered in the target file for file transfer, transfer that
password (set in the Ethernet module) using the FTP operation
command after login.
If a password is registered, that file cannot be accessed unless a
password of the same character string is designated.
The password is a character string for file access that the user
registers in the Q/LCPU and it allows/prohibits access to the target
file.
2) The Q/LCPU files of target file transfer must be only the files in the root
directory for each memory.
3) When the Q/LCPU file being accessed, do not perform any Q/LCPU key
switch operations, change operation status with the programming tool
(such as RUN
or install/remove the memory card or SD memory card.
If any of these operations are performed, the Q/LCPU files will corrupt
and the Q/LCPU may not be able to start again.
4) Do not perform any file operations (read/write/change file information) from
the programming tool when the FTP function is in operation.
When file operations are performed from a peripheral device, etc. while the
FTP function is in operation, the FTP function may abnormally end.
5) If the FTP communication port is designated as a port subject to the
remote password check, perform the file transfer operation after
changing the remote password status from lock to unlock.
Perform the lock processing for the remote password when the file
transfer processing is completed.
If the FTP communication port is not designated as a port subject to
the remote password check, the operation is completed normally
when the remote password unlock processing is performed.
The remote password is a character string registered in the Q/LCPU
with a programming tool by a user and data to allow/prohibit access to
the Q/LCPU of another station via the Q/LCPU in the station with the
Ethernet module connected or via the station with the Ethernet
module connected.
(4) Precaution when logging in to the Ethernet module (FTP server)
Only one external device (FTP client) can log in to the Ethernet module at a time.
STOP and STOP RUN), turn off power, reset power,
MELSEC-Q/L
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