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4 FUNCTIONS
4.5 Security
Access permitted/prohibited processing operation
The following describes the processing for permitting or prohibiting access from the external device to the FX5 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 FX5-CCLGN-MS.
If the password is not unlocked, the FX5-CCLGN-MS 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)
Remote password check operation
Communications that are checked
The FX5-CCLGN-MS 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.
*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 communications from the external device can be performed.
FX5-CCLGN-MS
FX5-CCLGN-MS
(*1)
(2)
(3)
FX5 CPU module
Path checked using
a remote password
Path not checked using
a remote password
Engineering tool
Remote password
check
Remote password
check
FX5 CPU module
(Own station)
(Another station)
Remote password
Remote
password
Engineering tool
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