Omron NT31 Operation Manuals page 242

System Maintenance
Screen Data Memory Check
Reference
S If the backlight is normal, it flashes. At this time, the "Backlight Check" touch
switch is displayed in reverse video.
S To end the backlight check, press the "Backlight Check" touch switch again.
Check if the screen data memory is functioning normally.
- In the screen data memory check, a write test is performed on the screen data
memory. Since all the screen data in the NT31/NT31C is lost in this check, con-
firm that this data is backed up at the Support Tool or memory unit before exe-
cuting it.
- If writing to the screen data memory is disabled by the setting for "System Set-
tings" 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.
Select "I/O Check".
Select "Device Check".
Select "Backlight Check".
Section 6-11
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