Mitsubishi Electric MELSEC iQ-R Series User Manual page 73

Precautions
The following section describes the precautions for using remote password.
■ Set connection
Set the remote password for the connection used for data communication 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 perform data communication. (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 destination 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.)
■ 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 Motion module for which the parameters are set. When using multiple
CPU modules in a multiple 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.
• A C controller, or a WinCPU module cannot use the remote password.
■ Accessing the programmable controller of another station
When the external device is accessing the programmable controller of another station via the Motion module, accessing the
programmable controller may not be possible if a remote password is set for the CPU module at the relay station or station to
be accessed.
A
Ethernet
B
C
D
No remote password
parameter
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1 FUNCTIONS
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1.4 Security