Mitsubishi Q00JCPU User Manual page 561

7
COMMUNICATION
PORTS OF CPU MODULE
(b) Enabling parameter settings
(c) Performing remote password unlock/lock processing
(3) Precautions for remote password
Precautions for the remote password check function are described below.
(a) Setting remote password to UDP connections
(b) Performing close processing before lock processing for TCP/IP
USING
After writing parameter settings to the CPU module, settings are enabled by
powering the programmable controller ON or resetting the CPU module.
Perform the remote password unlock/lock processing from an external device
using respective protocol as follows.
1) Using MELSOFT connection
Enter the remote password in the following dialog box that appears during
communication.
GX Developer performs unlock processing upon entering the remote
password and then access the CPU module.
Figure 7.30 Password confirmation screen
2) Using MC protocol
Use the dedicated commands for the MC protocol.
For details on the MC protocol dedicated commands, refer to the following
manual.
Q Corresponding MELSEC Communication Protocol Reference Manual
3) Using file transfer (FTP server) function
Use the "password-lock"/"unlock" commands. (
• Determine the communication target external device and do not
communicate with unspecified external devices. (The communication target
external device needs to be determined since UDP/IP connections can
communicate with any other devices, including the device that has performed
unlock processing, after the remote password unlocking processing is
completed normally.)
• At the end of data communication, always perform the remote password lock
processing. (If lock processing is not performed, unlock status is held until a
time-out occurs. When there is no communication for 10 minutes, the CPU
module automatically performs time-out based lock processing.)
To prevent unauthorized access more strictly using the remote password, it is
recommended to set all connection protocols to TCP/IP and disable GX
Developer direct connection in parameter.
connections
When close processing is performed before lock processing for TCP/IP
connections, the CPU module automatically performs lock processing.
BUILT-IN ETHERNET
7.7 Remote Password
Section 7.6 (5))
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