Omron Programmable Terminals NT31 NT31C Setup Manual page 217

System Maintenance
Check the RUN LED by following the menu operation from the System Menu
shown below.
Ver 3.10
• If the RUN LED is functioning normally, it will operate as follows. At this time the
LED Check touch switch will be displayed in reverse video.
Lit in green OFF lit in red OFF lit in green...
• To end the LED check, press the LED Check touch switch on the DEVICE
CHECK MENU screen again.
Select Maintenance Mode.
Select I/O Check.
Select Device Check.
Select LED Check.
Section 6-11
207