Remote Password - Mitsubishi Electric QJ71LP21 Reference Manual

7 APPLICATION FUNCTIONS

7.12 Remote password

QCPU QJ71
LP21
2) Transfer the remote password
to QJ71E71 when the system
is powered on or it is reset.
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The remote password function is the function for preventing a remote user from
illegally connecting to a remote I/O module and PLC 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, modem
interface 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 PLC CPU.
REMARK
The remote password set for the PLC CPU of the remote master station does not
affect the remote passwords of the remote I/O stations.
(a) Setting, changing and cancelling a remote password
1) 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, Ethernet module, and modem interface
module when the system is powered on or the remote I/O module is
reset.
2) 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 cancelled 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.
Ethernet
MELSECNET/H
QJ72
LP25
GX Developer
1) Set, change, and cancel a remote
password and write it into QJ72LP25.
GX Developer
QJ71
E71
3) QJ71E71 checks the remote password.
1) Set, change, and cancel a remote
password and write it into QJ72LP25.
MELSEC-Q
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