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MELSEC-Q
7 APPLICATION FUNCTIONS
7.12 Remote password
The remote password function is the function for preventing a remote user from
illegally connecting to a remote I/O module and programmable controller CPU.
The remote password function can be used by setting a remote password for a remote
I/O module.
If a remote password has been set up, the serial communication module and Ethernet
module check the remote password when a connection request is issued from a
remote user to a remote I/O module and programmable controller CPU.
REMARKS
The remote password set for the programmable controller CPU of the remote master
station does not affect the remote passwords of the remote I/O stations.
(1) Setting, changing and cancelling a remote password
(a) Setting a remote password
Set a remote password on the remote password setting screen of GX
Developer. Write the remote password to be set by connecting GX
Developer with the target remote I/O module directly.
The remote I/O module transfers the remote password to the specified
serial communication module and Ethernet module when the system is
powered on or the remote I/O module is reset.
(b) Changing and Cancelling the remote password
By connecting GX Developer with a remote I/O module, the remote
password of the connected remote I/O module can be changed and
cancelled.
The remote password can be changed by setting a new remote password
by GX Developer and writing it into the remote I/O module.
The remote password can be canceled by deleting it by GX Developer and
writing it into the remote I/O module.
The figure below shows the outline of setting, changing, and canceling a remote
password with the Ethernet module.
QJ71
E71
GX Developer
Ethernet
1) Set, change, and cancel a remote
password and write it into QJ72LP25.
3) QJ71E71 checks the remote password.
2) Transfer the remote password
to QJ71E71 when the system
is powered on or it is reset.
GX Developer
QJ72
LP25
Power supply
QCPU QJ71
LP21
MELSECNET/H
1) Set, change, and cancel a remote
password and write it into QJ72LP25.
Power supply