Omron Programmable Terminals NT631, Operation Manuals

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208
System Maintenance
Section 6-11
6-11 System Maintenance
The NT631/NT631C has the following maintenance and check functions.
Item Function Page
I/O Settings Adjustment of display panel contrast and brightness of the backlight. Page 208
Calendar Check Display and setting of the time data of the NT631/NT631C clock function. Page 211
PT Settings
Direct connection setting of the screen data in the NT631/NT631C and display of the
setting statuses of the serial ports.
Page 213
Display history record Display and printing of display history record data. Page 215
Alarm history record Display and printing of alarm history record data. Page 217
Screen data check Display of each screen stored in the NT631/NT631C. Page 219
I/O
Device check Checking of the I/O functions of the NT631/NT631C. Page 222
I/O
check
I/F check Checking of the communication functions of the NT631/NT631C. Page 231
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 (for NT631C–ST141
j
–EV1 only)
The NT631C–ST141
j
–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).
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”.