476
Buzzer, Backlight, and Display Control
Section 8-2
Turning off the Screen by the Operation at the PT Status Control Area
This method makes it possible to turn off the screen at any required time.
NT31/NT31C
Turning off the screen
← 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 turn off the screen during operation of the NT31/NT31C, operate the PT status
control area as indicated below.
(1) Set “0” (OFF) for bit 15 in the fourth word (n + 3 words) from the beginning of
the PT status control area.
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