Omron NT20M Operation Manual page 10

Features
1-1 Introduction
1-2 Features
Clear Display
Industry's Largest LCD
Screen
Industry's First CFL
Two-color Backlight Display
Display Functions
2
This manual describes the installation and operation of NT20M and
NT2000M Programmable Terminals (PTs). Both models can come with or
without touch panels. Programmable Terminals have three main functions: 1)
monitoring operating conditions, 2) directing on-site personnel, and 3) input-
ting data.
1) PTs can monitor, in real time, system and equipment operating conditions,
production quantities, and so on. The PT display can show, for example,
whether the production line is operating normally, and what percentage of the
production target has been met. Bar graphs can be continually updated as
data is received from the host. On-screen characters can be displayed as
plain, reverse video, blinking, or reverse blinking. In addition, lamps, bar
graphs, and figures can all be created. Screen data can be registered at the
PT in advance, and can be displayed simply by transmitting the appropriate
screen number from the host.
2) PTs can inform on-site personnel of current conditions that need to be ad-
dressed. Depending on the nature of the situation, built-in or external buzzers
can be sounded to alert personnel to problems that have developed. De-
pending on factors such as distance from the host, the number of devices
connected, and the response time, any of a variety of communications meth-
ods may be selected.
3) PTs can input data for controlling certain operations and communicating
information to the host. Setting switches and a ten-key pad allows a PT to be
used as a control panel. In the example shown below, touch switches used
for inputs to the host are displayed. When this screen is displayed, the on-
site operator can control a device by means of touch switches.
Aside from touch switches, the PT can provide inputs by means of numeric
settings and externally connected switches. The illustration below shows a
numeric setting screen that can be used for inputting numeric data.
The screens used for these operations can be created in advance by using
the "Support Tool" software on a personal computer. The screen data that is
created using the Support Tool can be printed out, saved to a diskette, or
transferred to the PT. Either an FA Computer or a Programmable Controller
can be used as the host.
The display is extremely clear due to an STN liquid crystal display with a
backlight. For long life, the backlight can be set to turn off automatically. With
the NT20M-Dj131 and the NT2000M-Dj131 models, the backlight is re-
placeable.
By increasing the dot size, the display screen for the NT2000M has been en-
larged.
With the NT20M-Dj131 and the NT2000M-Dj131 models, the backlight
can be switched between white and red. It is ordinarily white, but under ex-
treme circumstances it can be switched to red for greater visibility.
Up to 250 screens can be registered. A total of 256 touch switches and rect-
angular or circular lamps can be created and registered, with up to 64 touch
switches and/or lamps for a single screen. In addition, up to 32 messages
(strings of 32 characters) and 128 eight-digit numbers can be registered. Fig-
Section 1-1