212
System Maintenance
Section 6-11
6-11 System Maintenance
The NT31/NT31C has the following maintenance and check functions.
Item Function Page
I/O Settings Adjustment of display panel contrast and brightness of the backlight. Page 212
Calendar Check Display and setting of the time data of the NT31/NT31C clock function. Page 215
PT Settings
Direct connection setting of the screen data in the NT31/NT31C and display of the
setting statuses of the serial ports.
Page 217
Display history record Display and printing of display history record data. Page 219
Alarm history record Display and printing of alarm history record data. Page 221
Screen data check Display of each screen stored in the NT31/NT31C. Page 223
I/O
Device check Checking of the I/O functions of the NT31/NT31C. Page 227
I/O
check
I/F check Checking of the communication functions of the NT31/NT31C. Page 236
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 brightness
of the backlight.
Contrast Adjustment
The NT31/NT31C allows the contrast to be adjusted in 100 steps. The “CON-
TRAST 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 NT31/NT31C is reset (and even if the
voltage of the built-in battery becomes low).
Adjust the contrast of the display panel by following the menu operation from the
System Menu shown below.
Select “Maintenance Mode”.
Select “I/O Settings”.
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