Omron NT15S, Operation Manual

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69
Standard Mode
Section 4-4
4.4.3.1 Reactivating the Password Protection
The access authorization for a mask or variable is reset whenever
-
the operating terminal is switched off and turned back on
- an incorrect password is entered
- bit 2 in the
,
Write Coordination Byte
.
is set
- the system variable MskchgResPasswd is activated
- the option Reset Password in the mask parameters of the password-protected
mask is selected.
4.4.3.2 Password Management
Passwords are stored in the operating terminal’s Flash memory. These are the
default passwords that are used when the terminal is started up initially after a
download. At the same time, the passwords are stored in the operating terminal’s
RAM.
The passwords stored in the flash memory can be reactivated by writing to the
system variable FlashPasswd.
Every password (except for the master password = first password in the list) can be
edited from the terminal. For this process, the password to be edited is written to the
system variable MskchgPasswd first. The new password is then written twice to
the system variable ChangePasswd. If both entries for the new password are
identical, the password will become effective immediately; otherwise, a system
message will be displayed and the password reset.
Passwords are stored and compared as 11-character strings. The passwords are
entered with the Alphanumerical Editor.
Passwords are only globally programmable (not language-specifically).
4.4.3.3 Password Mask and Password Functionality
- It is possible to create a special mask which requests entry of a password. This
password mask is then displayed whenever an attempt is made to call up a
password-protected mask without first entering a password with sufficient au-
thorization. When a password with sufficient authorization is entered into this
mask, the previously selected password-protected mask is called up once the
Data Release key is pressed. There are no restrictions with respect to the re-
maining mask contents (texts, further variables, soft keys, etc.).
- You can specify for every mask separately whether the password protection is
to be reactivated after the mask is exited.
- For those cases where no valid password has been entered, an option to exit the
mask must be provided. The Cursor home key can be programmed to perform
this function, for example.
- If no such mask has been created to prompt for password entry, the operator will
be required to enter the password in masks specifically designed for this pur-
pose.
- The entire password protection can be deactivated by setting the system vari-
able PasswdInactive to the value 1. The operating terminal will then act as if all
masks were created with an edit and view level of 0. The system variable is
battery-backed, so deactivation will therefore still be in effect after the operating
terminal is restarted.