Set Connection; When Remote Password Is Set For Udp/Ip Connection; Tcp/Ip Close Processing; Remote Password Valid Range - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Precautions
The following section lists the precautions for using remote password.

■Set connection

Set the remote password for the connection used to exchange data with an external device that can execute the unlock/lock
processing.

■When remote password is set for UDP/IP connection

• Determine the external device to communicate with and exchange the data. (With UDP/IP, after the remote password is
unlocked data can be exchanged with devices other than the unlocked external device too. Determine the communication
device before starting use.)
• Always lock the remote password after data communication is finished. (If the remote password is not locked, the unlocked
state is held until timeout occurs.)
• Set "UDP" for "Existence Confirmation" of the target connection in "External Device Configuration" under "Basic Settings".
Set as small a value as possible for the "Destination Alive Check Start Interval Timer" and "Destination Alive Check Interval
Timer" in "Timer Settings for Data Communication" under "Application Settings".

■TCP/IP close processing

If the TCP/IP is closed before the TCP/IP is locked, the CPU module will automatically start the lock processing.

■Remote password valid range

The remote password is valid only for access from the Ethernet-equipped module for which the parameters are set. When
using multiple CPU modules in a multi-CPU system, set a remote password for each CPU module for requiring a remote
password.
Enable/
Disable
Remote password
check
Remote password
parameter
The remote password is checked when accessing with path A or B.
The remote password is not checked when accessing with path C or D.
■Connection for nonprocedural fixed buffer communication
The remote password is not checked during communication for nonprocedural fixed buffer communication, so do not set the
remote password check.
■Accessing another station's programmable controller
When the external device is accessing another station's programmable controller via the Ethernet-equipped module, it may
not be possible to access the programmable controller if a remote password is set for the CPU module at the relay station or
access station.
A
Ethernet
B
C
D
No remote password
parameter
1 FUNCTIONS
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1.13 Security Function
1