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10 CPU Unit Functions
CJ2 CPU Unit Software User’s Manual
10-6 Security Functions
10
10-6-2 Read Protection Using Passwords
• Write Protection
Displaying function blocks will be enabled in the CX-Programmer, but it will not be possible to
make changes.
Additional Information
Even if task read protection is applied, it will be possible to read the function block definitions if a
user program that includes function blocks is used. To read-protect the function block, use func-
tion block protection.
Additional Information
Task read protection cannot be set if UM read protection is already set. However, it is possible to
set UM read protection after task read protection has been set.
1 Display the Protection Tab Page of the PLC Properties Windows and register a password for pro-
tection.
• UM read protection Field
Enter a password for UM read protection.
• Task read protection Field
Enter a password for task read protection.
Operating Procedure
END
CJ2 CPU Unit
END
END
CX-Programmer
Password?
Set a password for particular tasks in the project directory.
Those tasks cannot be displayed without inputting the password.
The entire user program can be uploaded, but
password-protected tasks will not be displayed until the
password is input.
The other tasks can be displayed/edited and are also accessible
through online editing.
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Properties
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