Precautions For Designing System; Ftp Client; Processing On Cpu Module Side; Communication Processing - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

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

• Only the drive of the CPU module on the own station can access files.
• Do not power off or reset it, 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 Ethernet-equipped 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 Ethernet-equipped 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 (MELSOFT connection or SLMP) is simultaneously executed with UDP/IP during file
transfer with FTP, an error such as timeout may occur. Either communicate after the file is transferred, or communicate with
TCP/IP.
1 FUNCTIONS
132
1.9 File Transfer Function (FTP server)
 
Internet Explorer . If attempted, Internet Explorer

will issue an error.