471
Buzzer, Backlight, and Display Control
Section 8-2
To sound the buzzer during the operation of the NT31/NT31C, operate the PT sta-
tus control area as indicated below.
(1) Set “1” (ON) for the following bit in the fourth word (n + 3 words) from the be-
ginning of the PT status control area according to the required buzzer sound.
- Continuous sound: Bit 13
- Short intermittent sound: Bit 12
- Long intermittent sound: Bit 9
8-2-2 Stopping the Buzzer Sound
With the NT31/NT31C, the following three methods are used for stopping the
buzzer sound.
- Displaying a screen for which the buzzer attribute is not set
- Operating the PT status control area
- Pressing a touch switch which has the “buzzer stop” function
Stopping the Buzzer by Displaying a Screen for Which the Buzzer Attribute Is Not Set
When this method is used, the buzzer stops sounding automatically when the
screen is switched to the one where the buzzer attribute is not set.
[Setting]
When creating a screen using the Support Tool, cancel the check mark for the
buzzer attribute at the screens where the buzzer should not sound. (Usually, the
buzzer attribute is not checked.)
[Operation]
When the screen for which the buzzer attribute is not checked is displayed during
operation of the NT31/NT31C, the buzzer automatically stops sounding. For the
procedure for switching the screen, refer to 8-3-1 “Switching the Screen” (page
480).
Stopping the Buzzer by the Operation at the PT Control Area
This method allows the operator to stop the buzzer at any required time.
NT31/NT31C
Stopping the buzzer
← 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 and, according-
ly, there are no special settings required for the control of buzzer.
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