Remote Password Setting Processes (Unlock And Lock Processes) - Mitsubishi Electric MELSEC-L SERIES Basic User Manual

14.4.2
Remote password setting processes (unlock and lock
processes)
This section describes the processes that enable/disable access from the connected devices to the programmable
controller.
(1) Access permission process (unlock process)
To access the specified CPU module, the connected device performs a remote password unlock process for the
remote password-protected E71 on the station in direct connection (own station). The following are unlock
process methods.
• Dedicated command of the MC protocol (remote password (unlock): 1630)
• When the file transfer (FTP server) function is in use: Dedicated FTP command (password-unlock)
• Programming tool: Input of the remote password in the window
• When the Web function is in use: Input of a remote password in the window displayed on the Web browser
When the unlock process is not performed, the remote password-set E71 that has accepted a communication
request checks an entered remote password and disables access to the specified station.
All data received prior to the unlock process is treated as an error.
(2) Access process
Access to the specified station is enabled when the remote password unlock process is completed normally.
Specify the station to be accessed and access the station.
(3) Access prohibition process (lock process)
To terminate the access to the specified station, the connected device performs the remote password lock
process to disable subsequent access. The following are lock process methods.
• Dedicated command of the MC protocol (remote password (lock): 1631)
• When the file transfer (FTP server) function is in use: Dedicated FTP command (password-lock)
• Programming tool: Automatically executes the lock process.
• When the Web function is in use: Automatically performs a lock process when the Web browser is closed.
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