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CHAPTER 3 FUNCTIONS
3
3.19 Security Function
3.19.3 File access control by security key
3.19.3 File access control by security key
This function protects unauthorized access to the files in the CPU module by writing a security key
*1
to the module.
The CPU module is locked with a security key and the files in the module can only be accessed from a programming
tool where the same security key is registered.Note 3.14
*1 Security key is a security code used to control file access between a programming tool and CPU module. A security key
includes the following information.
• Name: A name of the security key. The number of characters used is 1 to 128.
• Date and time: Date and time when a security key is generated. The display format is [yyyy/mm/dd hh:mm].
If the security key used to lock a project or CPU module cannot be imported from a personal computer to a programming
tool, the security key cannot be unlocked and the project data cannot be accessed permanently. When using a security key,
note that we take no responsibility for any loss caused to the user, individual, or company resulting from lost data.
Note 3.14
Only the High-speed Universal model QCPU and Universal model Process CPU support this function.
Universal
With a security key (The status of the CPU module: Locked)
Only the programming
tool where the security
key is registered can
access files.
Without a security key (The status of the CPU module: Unlocked)
CPU module
Accessible
USB connection
Not accessible
: Locked status
: Security key
Accessible Accessible
CPU module
Lock the CPU module by writing
the registered security key to
the module using a programming
tool.
Any programming tool connected can access
files.
A programming tool
where a security
key is registered
A programming tool
where no security
key is registered
Programming tool Programming tool
Access control target files
Such as a program file
and parameter file
Access control target files
Such as a program file
and parameter file
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