Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 212

(7) Authentication method
Passwords are authenticated in three ways.
• By a programming tool
• By the FTP server
• By the MC protocol
(a) Authentication by a programming tool
The entered password is valid until the project is closed.
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1.
Whenever an online operation requiring password
authentication is executed, the "Disable Password"
window appears.
Select an authentication target file, and click the
"Setting" button.
2.
Enter a password in the "Input Disable Password"
window.