7 - 70 7 - 70
MELSEC-Q
7 FUNCTION
7.17.2 Remote passwords
The remote password function prevents illegal access to the High Performance model
QCPU by users in remote locations.
The remote password function is enabled for use by setting it up in the High
Performance model QCPU.
When the remote password function has been set, a check will be run on remote
passwords when users in remote locations attempt to access the High Performance
model QCPU with serial communication modules or Ethernet modules with modem
functions.
(1) Setting up, amending and canceling remote passwords
(a) Remote password setup
Remote passwords are set up on the GX Developer's remote password
setup screen. The GX Developer is then connected to the High
Performance model QCPU into which the remote password is to be set,
and the password uploaded.
The High Performance model QCPU will transmit the remote password to
specified serial communication modules and Ethernet modules when the
power supply to the sequence is switched on or the High Performance
model QCPU is reset.
(b) Amending and canceling remote passwords
It is possible to amend and cancel remote passwords by connecting the GX
Developer to the relevant High Performance model QCPU.
Remote passwords set in the High Performance model QCPU can be
amended or cancelled by setting up an amended password or canceling a
remote password with the GX Developer.
Remote passwords cannot be amended or cancelled from a remote
location.
For example, an outline of what will happen when a remote passwords is
set up, amended or cancelled from an Ethernet module is shown below.
Power supply
GX Developer
Ethernet
. . . . The remote password is
set up,
amended
or cancelled,
and the result written in the QCPU
A check is run on the remote password
The remote password is
transmitted to QJ71E71
when the power is switched
on or the system reset
GX Developer
CPU module
QJ71E71
To Next Page
Loading...
Need help?
General
