If a username is set up to use the DP4 System menu, you can add or change the password as follows:
Log onto the DP4 System menu with the username. If no password has been set up yet, press <Enter> on the password field
On the DP4 System Main menu, select Configuration Options
On the System and User Setup menu, select the Password option
Enter a new password as described in Changing a User Password. The Change password utility terminates and you are returned to the System and User Setup menu
Exit from DP4, log on to the DP4 System menu with the appropriate username and test whether the new password is accepted