Turning Off The Screen - Omron NT631 Series Reference Manual

Buzzer, Backlight, and Display Control
Controlling the Backlight Status by the Operation at the PT Status Control Area
Setting
Operation
15 14 13 12

3-2-4 Turning off the Screen

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Using this method, the backlight status (lit/flashing) can be controlled at any re-
quired time.
Backlight is flashing
The PT status control area must be allocated to a word in the host, accordingly,
no special settings are required for the control of buzzer.
The bit for controlling the PT status (PT status control bit) is provided at the fourth
word (n + 3 words) from the beginning of the PT status control area.
11 10 9 8 7 6 5 4 3
0
To control the backlight status during the operation of the PT, operate the PT sta-
tus control area as indicated below.
Set 0 (OFF) or 1 (ON) for bit 8 in the fourth word (n + 3 words) from the beginning
of the PT status control area.
Word n + 3, bit 8
• To turn the backlight on: 0 (OFF) 1 (ON)
• To flash the backlight:
By turning off the screen while it is not in use, the backlight lasts for a long time
and, at the same time, afterimage on the display panel can be prevented. The
backlight is turned off automatically when the screen is turned off. If the screen
saver function is set to Display, however, it is not possible to prolong the life of the
backlight since it is not turned off when the screen is turned off.
The PT provides the following two methods for turning off the screen.
PT
2 1 0 Bit
0
Controlled Item
15 Screen display
14 Processing priority registration (for NT link (1:N))
13 Continuous buzzer
12 Intermittent buzzer (short)
11 Display history initialization
10 Not used
9 Intermittent buzzer (long)
8 Backlight mode
7 Screen printing
6 PT window opening
5 Numeral/character string input
4 PT screen switching
Memory table copy execution
3
Memory table copy type
2
Alarm history initialization
1
Not used
0
Bits 2 and 3 are not used when the PT is in NT30/620
compatible mode.
1 (ON) 0 (OFF)
Section
PC
PT status control area
Screen switch setting
Copy memory
table setting
← Control data
PT status control setting
Reserved for system use
1 (ON) 0 (OFF)
Performed Not performed
Registered Canceled
Sounded Stopped
Sounded Stopped
Performed Not performed
Always 0
Sounded Stopped
Lit Flashing
Performed Not performed
Disabled Enabled
Disabled Enabled
Disabled Enabled
Performed Not performed
Character string
Numeral
Not performed
Performed
Always 0
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