Mitsubishi Electric MELSEC Q Series Reference Manual page 277

7 APPLICATION FUNCTIONS
QCPU QJ71
LP21
1) Transfer the remote password
to QJ71E71 when the system
is powered on or it is reset.
7 - 41
(2) Unlocking and locking the remote password
The remote password is unlocked (connection is allowed) via the modem by the
serial communication module or via Ethernet by the Ethernet module.
When the remote password is matched, connection to the remote I/O module is
allowed.
The figure below shows the outline of unlocking and locking (connection is
allowed) a remote password with the Ethernet module.
Ethernet
MELSECNET/H
QJ72
LP25
3) QJ71E71 checks the remote password.
GX Developer
(3) Number of modules for that can be set to check remote passwords
The table below lists the number of modules that can be set to check remote
passwords.
Module name
Ethernet module
Serial communication module
2) Enter a remote password when connecting
to QJ71E71, and connect to QJ72LP25
GX Developer
after the password is unlocked.
4) The remote password is locked when the
line is closed.
QJ71
E71
Max. number of modules
MELSEC-Q
Max. number of modules
in the system
4
8
8
7 - 41