Precautions - Mitsubishi Electric FX5 User Manual

8.4

Precautions

Precautions for designing system
Design the system (such as configuration of interlock circuits in the program) so that the entire system always functions
properly during file transfer to the operating system and during status control of the programmable controller.
FTP client
• The FTP command specifications may differ from this manual depending on the FTP client. In this case, refer to the manual
for the FTP client and check the functions and operation methods.
• FTP operations are not possible from Microsoft
• Specify the IP address for the FTP command without zero fill. (Do not set "1" as "001".)
Processing on CPU module side
• You can only access the files in the SD memory card installed on a CPU module.
• Do not power off or reset the CPU module, or insert/eject the SD memory card during file access. The file could be
damaged if these are attempted.
• Do not manipulate the files from a peripheral, such as an engineering tool, while accessing the files. (This also applies to
online operations such as writing during RUN as the files are manipulated.) If the file is manipulated from another device
during the file transfer function (FTP server) operation, the peripheral may issue an error. If the processing has been halted
due to an error, re-execute the processing before quitting the FTP function.
Communication processing
• If a timeout error occurs during file transfer, the TCP/IP connection will be closed. Log into the CPU module with the FTP
client again before resuming file transfer.
• The existence of the external device is checked with the FTP connection.
• The file transfer processing time will differ according to the Ethernet line's load rate (line congestion), the number of
connections being used simultaneously (other connection's communication processing), and system configuration
(distance between FTP server and FTP client, method of accessing CPU module).
• Only one external device (FTP client) can log into the CPU module at one time. If a connection is attempted from another
FTP client in the login state, an error will occur without establishing the connection.
• If another communication function is simultaneously executed with UDP/IP during file transfer with FTP, a timeout error and
others may occur. Either communicate after the file is transferred, or communicate with TCP/IP.
Writing files
• An existing file cannot be overwritten. Delete an existing file with the file delete command (delete, mdelete) before writing
files.
• A read-only file or a file locked by a function other than FTP cannot be written. If attempted, a write error occurs.
• A file cannot be transferred when the SD memory card used is protected. If attempted, a write error occurs.
• When writing a large file to the SD memory card, set the CPU module to STOP. If writing is performed in the RUN state, a
communication error may occur.
• The number of files that can be written is maximum [maximum number of files that can be written] - 1 file. For details on the
maximum number of files that can be written to the SD memory card, refer to the following.
MELSEC iQ-F FX5 User's Manual (Application)
 
Internet Explorer . If attempted, Internet Explorer
8 FILE TRANSFER FUNCTION (FTP SERVER)

will issue an error.
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8.4 Precautions
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