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Program Protection Section 6-7
Write-protection
Using Passwords
The program (or selected tasks) can also be write-protected if the write pro-
tection option is selected from the CX-Programmer when a password is being
registered for the entire program or those selected tasks. The write protection
setting can prevent unauthorized or accidental overwriting of the program.
Note 1. If the selected tasks are write-protected by selecting this option when reg-
istering a password, only the tasks (program) that are password-protected
will be protected from overwriting. It will still be possible to overwrite other
tasks with operations such as online editing and task downloading.
2. All tasks (programs) can be overwritten when program read protection is
not enabled.
Operating Procedure
1,2,3...
Table 1 When registering a password in the
UM read protection password
Box or
Task read protection
Box, select the
Prohibit from overwriting to a protected
program
Option.
3. Either select
PLC - Transfer - To PLC
to transfer the program or select
PLC - Protection - Set Password
and click the OK button.
Note The setting to enable/disable creating file memory program files will not take
effect unless the program is transferred to the CPU Unit. Always transfer the
program after changing this setting.
CX-Programmer
Password?
When a password is being registered for the entire user
program or selected tasks, program write-protection can be
enabled/disabled with an option setting.
The user program cannot be overwritten.
CPU Unit
Overwriting can be prohibited with password protection,
regardless of the DIP switch setting.
Memory Cassette
The user program cannot be overwritten.
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