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System Maintenance Section 6-11
6-11 System Maintenance
The NT631/NT631C has the following maintenance and check functions.
This section describes how to use these functions.
6-11-1 I/O Settings
This function is used to adjust the contrast of the display panel and the bright-
ness of the backlight.
With the NT631/631C, you can adjust the contrast and brightness settings
using either of the following two methods.
Setting from the System Menu
Adjusting the contrast: Select System Menu/Maintenance Mode/I/O Settings/
Contrast Adjust.
Adjusting the brightness: Select System Menu/Maintenance Mode/I/O Set-
tings/Brightness Adjust.
Setting Using Special Screen During PT Operation
You can set the brightness and contrast by displaying the screen with the fol-
lowing number, using a touch switch with a switch screen function, or by spec-
ifying the display screen in the PT status control area.
Screen number 9030: Brightness and contrast adjustment screen.
Contrast Adjustment (for
NT631C-ST141@-EV1
only)
The NT631C-ST141@-EV1 allows the contrast to be adjusted in 100 steps.
The CONTRAST ADJUST screen enables you to make the adjustment while
actually checking the contrast on the screen. Once the contrast has been set,
it remains in effect even if the power is turned OFF or the NT631/NT631C is
reset (and even if the voltage of the built-in battery becomes low).
Item Function Page
I/O Settings Adjustment of display panel contrast and brightness of the backlight. 187
Calendar Check Display and setting of the time data of the NT631/NT631C clock function. 191
PT Settings Direct connection setting of the screen data in the NT631/NT631C and display of the
setting statuses of the serial ports.
193
Display history record Display and printing of display history record data. 194
Alarm history record Display and printing of alarm history record data. 196
Screen data check Display of each screen stored in the NT631/NT631C. 198
I/O
check
Device check Checking of the I/O functions of the NT631/NT631C. 201
I/F check Checking of the communications functions of the NT631/NT631C. 209