472
Buzzer, Backlight, and Display Control
Section 8-2
[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 stop the buzzer during operation of the NT31/NT31C, operate the PT status
control area as indicated below.
(1) Set “0” (OFF) for all of the following bits in the fourth word (n + 3 words) from
the beginning of the PT status control area.
- Continuous sound: Bit 13
- Short intermittent sound: Bit 12
- Long intermittent sound: Bit 9
Reference: If more than one bit among the bits indicated above is “1” (ON) at the same time,
only one type of buzzer sounds according to the priority: continuous buzzer > short
intermittent sound > long intermittent sound. To stop the buzzer when it is sound-
ing, set “0” (0) for all bits indicated above; setting “0” (OFF) only for the bit corre-
sponding to the type of buzzer sound may not stop the buzzer.
Stopping the Buzzer by Pressing a Touch Switch Which Has the “Buzzer Stop” Function
Using this method, an operator can stop the buzzer by the operation at the
NT31/NT31C. Usually, a “buzzer stop” touch switch is registered to a screen for
which the buzzer attribute is set to sound the buzzer.
[Setting]
There is an “input key – control” touch switch that has the “buzzer stop” ( ) func-
tion.
Register this touch switch on the screen when creating it using the Support Tool.
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