Mitsubishi Electric MELSEC iQ-R02CPU - Set Connection; When Remote Password Is Set for UDP;IP Connection; TCP;IP Close Processing; Remote Password Valid Range

1 FUNCTIONS
1.13 Security Function
179
1
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.
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.
Ethernet
A
B
C
D
Enable/
Disable
Remote password
check
No remote password
parameter
Remote password
parameter