Omron NT631C manual Touch switch is displayed in reverse video, Screen Data Memory, Check

System Maintenance		Section 6-11
	Ver 4.12	Select Maintenance Mode.

Select I/O Check.

Select Device Check.

Select Backlight Check.

	• If the backlight is normal, it flashes. At this time, the Backlight Check
	touch switch is displayed in reverse video.
	• To end the backlight check, press the Backlight Check touch switch again.
Screen Data Memory	Check if the screen data memory is functioning normally.
Check

Reference: • In the screen data memory check, a write test is performed on the screen data memory. Since all the screen data in the NT631/NT631C is lost in this check, confirm that this data is backed up at the Support Tool or Memory Unit before executing it.

•If writing to the screen data memory is disabled by the setting for System Settings in the System Installer mode, it is not possible to execute a screen data check.

•Once a screen data check has been started, it cannot be stopped.

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