Mitsubishi Electric MELSEC iQ-R Series User Manual page 67

Access permitted/prohibited processing operation
This section describes the processing for permitting or prohibiting access of the CPU module with remote password by the
external device.
■Access permit processing (Unlock processing)
The external device trying to communicate unlocks the remote password set for the connected RJ71GN11-T2.
If the password is not unlocked, the RJ71GN11-T2 to which the external device is connected prohibits access, so an error
occurs in the external device.
The unlocking methods are shown below.
• SLMP dedicated command (Remote Password Unlock)
• Input password 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 shown below.
• SLMP dedicated command (Remote Password Lock)
• Lock with engineering tool (executed automatically)
Remote password check operation
■Communications that are checked
The RJ71GN11-T2 checks the remote password for a communication request made to the own station or another station
received from the external device.
When checking a remote password for modules with multiple connections, the connection for which the remote password is
set is the target.
(3)
Engineering tool
*1 Since the remote password check is set, the communication request from the external device is not accepted. If the remote password
check is not set, the communication request can be accepted and data communication from the external device can be performed.
CPU module
Remote password
Remote password
check
(Own station)
(2)
(Another station)
Engineering tool
RJ71GN11-T2
(3)
CPU module
Remote Remote password
password check
(*1)
RJ71GN11-T2
Path checked using
a remote password
Path not checked using
a remote password
1 FUNCTIONS
1.4 Security
1
65