Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual page 49

Access permitted/prohibited processing operation
The following describes the processing for permitting or prohibiting access from the external device to the CPU module with a
remote password.
■Access permit processing (Unlock processing)
The external device trying to communicate unlocks the remote password set for the connected Motion module.
If the password is not unlocked, the Motion module to which the external device is connected prohibits access, so an error
occurs in the external device.
The unlocking methods are as follows.
• SLMP dedicated command (Remote Password Unlock)
• Password input from engineering tool
■Access processing
Access to the specified station is possible when the remote password is correctly unlocked. Execute any access.
■Access prohibit processing (Lock processing)
When access to the specified station ends, lock the remote password from the external device to disable subsequent access.
The locking methods are as follows.
• SLMP dedicated command (Remote Password Lock)
• Lock with engineering tool (executed automatically)
Precautions
The following describes the precautions when remote password is used.
■Setting of remote password for connection
Set the remote password for the connection used for data communications 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 communications. (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 to 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. In a system
configuration in which multiple modules are used, set a remote password for each module which requires a 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.
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3 FUNCTIONS
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3.5 Security