Omron NT31 Series, Operation Manuals

Page: 485 / 707

474
Buzzer, Backlight, and Display Control
Section 8-2
Controlling the Backlight Status by the Operation at the PT Status Control Area
Using this method, the backlight status (lit/flashing) can be controlled at any re-
quired time.
NT31/NT31C
Backlight is flashing
←
Control data
PC
PT status control area
Screen switch setting
Copy memory
table setting
PT status control setting
Reserved for system use
[Setting]
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.
[Operation]
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.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
0
0
Controlled Item
Screen display
Processing priority registration (for NT link (1:N))
Continuous buzzer
Intermittent buzzer (short)
Display history initialization
Not used
Intermittent buzzer (long)
Backlight mode
Screen printing
PT window opening
Numeral/character string input
PT screen switching
Memory table copy execution
Memory table copy type
Alarm history initialization
Not used
1 (ON)
Performed
Registered
Sounded
Sounded
Performed
Sounded
Lit
Performed
Disabled
Disabled
Disabled
Performed
Numeral
Performed
0 (OFF)
Not performed
Canceled
Stopped
Stopped
Not performed
Stopped
Flashing
Not performed
Enabled
Enabled
Enabled
Not performed
Character string
Not performed
Always “0”
Always “0”
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
To control the backlight status during the operation of the NT31/NT31C, operate
the PT status control area as indicated below.
(1) 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: 1 (ON)
→
0 (OFF)