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(d) Checking the security key information
The information (name, date, and time) of the security key can be checked using a programming tool.
(e) Unlocking the CPU module
To unlock the CPU module, use the security key set with the project. Even if the security keys set with the CPU
module and the project do not match, the CPU module can be unlocked. In this case, the system formats the
drives (access control target drives) in the CPU module. The CPU module can be unlocked while it is in the
STOP or PAUSE status.
(5) Authentication method
To read/write files from/to the locked CPU module, a security key needs to be authenticated between the CPU
module and the programming tool.
(a) Writing files
To write files to the locked CPU module, the security keys set with the CPU module and the project need to
match.
(b) Reading files
• To read files from the locked CPU module and create a new project, the same security key used to lock the
CPU module needs to be registered in the programming tool.
• To read files from the locked CPU module to an existing project, the security keys set with the CPU module
and the project need to match.
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