Omron NT4S Operation Manual page 81

Standard Mode
Up to eight different passwords with a length of up to 11 characters can be defined.
When defining the passwords, the access authorizations should be entered in a
hierarchical structure.
Example:
- password for the manufacturer of the system, machine, etc.
- password for servicing on site
- password for the machine setter, master craftsman, foreman etc.
- password for the system operator
The following figure illustrates how the access levels, edit and view levels work:
Fig. 2: Access levels
An access level (represented here by the height (1) of the walls) can be assigned to
every mask and a view level (length of ladder 2) and edit level (length of ladder 3)
can be assigned to every password.
A password must be entered for viewing only of a mask (5) that has been assigned
an access level (access level is greater than 0). The password must have been
assigned a view level (ladder 2) high enough to be able to get over the access level
(view wall). The mask (5) can then be viewed (through window 4) but the variable
values can not be edited.
For viewing and editing the variable values in a mask (5), a password must be
supplied which has a view level (ladder 2) and an edit level (ladder 3) that are both
high enough.
The following rules apply to passwords:
- Access is permitted if the view and edit level values are greater than or equal to
the values specified for the access level.
- The edit level must be equal to or less than the view level.
- The higher the values for the view level and edit level, the higher the degree of
authorization.
- The valid range of values for the view level and edit level is 0 to 255.
- The default setting for both is 0.
Section 4-4
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