Setting a password in plc can limit the operations of reading, monitoring, and changing the current value of the program, such as programming tools, display modules, and human-machine interfaces, so as to protect the program or limit the operator's monitoring of the program.
Mitsubishi FX series PLC password setting mode: Power on the PLC and connect it with the computer through the programming cable. In the programming software GX-DEVELOPER, select “Online†– “Login Keyword†– “New Loginâ€, the dialog box pops up. Write the password to be set in the box after the "keyword" in the box. The set password is 8 digits, which can be a number from 0 to 9 or a letter from A to F. After writing, click "Execute" and follow the prompts to enter the same password again. The password setting is different for the protection level of the PLC. The beginning text of the keyword is A, D~F, 0~9 will prohibit all operations, and the beginning text B will prohibit the program from reading and writing, without limiting the monitoring and Change the current value, the beginning of the text is C only limits the writing of the program, and does not limit other operations.
Mitsubishi plc's password feature settings can be set to read or monitor and disable all online operations.
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