Omron NT31 NT31C manual System Maintenance, 11-1 I/O Settings, Setting from the System Menu

System MaintenanceSection 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 191
	Calendar Check		Display and setting of the time data of the NT31/NT31C clock function.	Page 195
	PT Settings		Direct connection setting of the screen data in the NT31/NT31C and display of the	Page 197
			setting statuses of the serial ports.
	Display history record		Display and printing of display history record data.	Page 198
	Alarm history record		Display and printing of alarm history record data.	Page 200
	Screen data check		Display of each screen stored in the NT31/NT31C.	Page 202
	I/O	Device check	Checking of the I/O functions of the NT31/NT31C.	Page 205
	check	I/F check	Checking of the communication functions of the NT31/NT31C.	Page 215
			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 NT31/31C, 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 Settings/
			Brightness Adjust.
			Setting Using Special Screen During PT Operation
			You can set the brightness and contrast by displaying the screen with the follow-
			ing number, using a touch switch with a switch screen function, or by specifying
			the display screen in the PT status control area.
			Screen number 9030: Brightness and contrast adjustment screen.
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).

191