Screen Display; Classification Of Screens - Omron NT20S Operation Manual

Screen Display

4-3

Screen Display

4-3-1

Classification of Screens

Normal Screen
Overlapping Screen
122
This section describes the screen information required for the operation with the
NT20S.
For details on how to change the displayed screen, refer to "Switching the Screen
Display" on page 157, and "Display Specified Screen" on page 204. For the meth-
ods used to ascertain the screen number of the screen currently displayed, refer to
"Notifying the Display Screen to the PC (To Display the Number of Currently Dis-
played Screen)" on page 160, and "Request Screen Number" on page 204.
The NT20S is provided with the following types of screens which are classified by
the display method.
S Normal screen
S Overlapping screen
S Continuous screen
The screen type is set with each screen in the "Screen List" screen of the support
tool. Select a screen type according to the purpose, and create characters and
figures on the screen. In the case of the NT20S-ST128 (RS-232C), character
strings and graphics can be also displayed in accordance with commands from the
host, independently of the currently displayed screen. The details of each screen
type are given below.
A normal screen is the basic screen of the NT20S. It is not necessary to select a
screen type (overlapping or consecutive) when to create the screen data on a nor-
mal screen.
When a normal screen is selected, existing screens will be erased and a normal
screen will be displayed.
Several normal screens can be overlapped and displayed as one screen. A group
of overlapped screens is called an "overlapping screen".
Several normal screens are displayed in the order of screen numbers which have
been designated to each screen and form an overlapping screen. Up to eight
screens can be overlapped to form one overlapping screen. The base screen used
for making an overlapping screen is called a "parent screen", and a bunch of
screens which are laid over the parent screen are called "child screens".
All display elements can be used on a parent screen.
The screen attributes such as a buzzer attribute set in the parent screen become
effective in an overlapping screen.
Section 4-3