L-VIS User Manual
99
LOYTEC
Version 6.2
LOYTEC electronics GmbH
9.4 Page
Page objects are simple objects to organize the control elements which are visible on the
device. When a page object is connected to a menu item and the item is selected from the
menu, the page and all the controls on it will be shown on the display. Previously visible
controls will be hidden, but will continue to exist on the device (so that a trend control may
continue to record data, for example). Technically, the function of a page therefore is to
group a number of controls together to show or hide them all at the same time.
9.4.1 Page Properties
On the
Common Properties
page, a bitmap for the page background may be specified.
Such a bitmap should match the dimensions of the page, for example 320x240 pixels on an
LVIS-3E100. Please also see the information in section 8.12.2 before using a background
bitmap. For a single-color background, select the desired color on the
Color
property page.
All other properties of a page object are set on the
Menu / Page
property page.
On this page, the following settings are available:
View Timeout
: If this timeout is not zero, and there is no user input for the
specified amount of time, the system automatically switches to the next page
(provided there is more than one page connected to the same menu item). After
the last page was shown, the procedure is restarted from the first page.
Page Access:
This defines the minimum access level required to view the page if
it is marked as locked/protected (see below).
Locked Page
: If this flag is set, the page may only be displayed if the current
access level is equal to or higher than the level specified for this page (see
above). If the access level is not sufficient, a suitable PIN code must be entered.
Invisible Page:
Allows hiding the page on the device, which means that it will
not be accessible for the user until this flag is removed. However, the controls on
a hidden page work as usual, for example a trend control placed on such a page
will still be recording trend data. A hidden page may also be used as the target of
a show page action, so that the page may only be visited through this action and
not directly via the menu.
Default Page:
Mark this page as the default page of the device. The default page
is displayed after a configurable amount of idle time and when the device is
started.
Login Page:
Mark this page as the login page of the device. The login page is
displayed when the user switches to a protected page for which the current access
level is too low. On the login page, there should be at least one numeric input
field to enter a PIN code (write the value to the
PIN Code Enter
register). It is
useful to place other information on this page as well, for example the current
access level and the minimum access level required to view the protected page. A
button to execute the
back one page
action is also useful in case the user does not
have the required PIN code and wants to go back to where he came from.
About Page:
Mark this page as the about page of the device. This page is shown
when the user selects the
About
item in the setup menu or when the device
switches to the default page after the idle timeout and there is no default page set.