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CHAPTER6 FUNCTIONS
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6.19 System Protection
6.19.1 Password registration
(a) Target memory
Select a memory storing a file where a password is to be registered.
(b) Data type
Displays the type of a file stored in the target memory.
(c) Data name
Displays the name of a file stored in the target memory.
(d) Registration
Displays "*" when a password has been set to the target file.
(e) Password
Enter current password or a password to be registered.
The Registration Condition column can be set after setting a password.
(f) Registration Condition
1) Write protect
Writing to a password-protected file is prohibited (reading is allowed).
2) Read/Write protect
Reading and writing to a password-protected file is prohibited.
3) Clear
The set password is cleared (entering the current password is necessary).
(4) Precautions
A password registered with a file cannot be read from the file.
Forgetting the registered password disables the following operations.
(a) Basic model QCPU
• Program memory: Format PLC memory
• Standard ROM: Write the program memory to ROM
(b) High Performance model QCPU, Process CPU, and Redundant CPU
• Program memory and memory card: Format PLC memory
• Standard ROM: Batch-writing
Make sure to record the registered password and store the recording paper.
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