7
COMMUNICATION USING BUILT-IN ETHERNET
PORTS OF CPU MODULE
7.7 Remote Password
7 - 45
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
(1) Communication method when a remote password is set
The communication procedure with the Built-in Ethernet port QCPU with a preset
remote password is described below.
(a) Access enable processing (unlock processing)
An external device such as a personal computer performs remote password
unlock processing for the CPU module.
When unlock processing is not performed, an error occurs in the external device
since the CPU module does not accept access.
(b) Access processing
Access is enabled after the remote password unlock processing is completed
normally.
(c) Access disable processing (lock processing)
Remote password lock processing is performed from the external device to
disable subsequent access after the access is completed.
Figure 7.28 Remote password operation overview
<Accessing the CPU on host station>
(a) Unlock processing
(c) Lock processing
(b) Access
QnUDE(H)CPU
Ethernet
Enable/
Disable
Remote password
check
Remote password
parameter
<Accessing the CPU on another station>
(a) Unlock processing
(c) Lock processing
(b) Access
QnUDE(H)CPU
Ethernet
Enable/
Disable
Remote password
check
Remote password
parameter
Network, such as CC-Link IE controller network
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