Omron NT31 Operation Manuals page 341

Lamps
330
Whether a lamp lights continuously or flashes when the lamp bit is set to "1"
(ON) is determined by the "ON Type" attribute.
Note that the display when the lamp is ON or flashing also changes according
to the presence or absence of a frame.
When there is a frame: The frame is always displayed.
When there is no frame: The lamp may be invisible when it is OFF
[When there is a frame display]
(OFF)
Light
Flash
Only the area inside
the frame flashes.
- To change labels
The labels of normal (standard) lamps are fixed display text. To make the label
change in accordance with the conditions, create an image/library lamp and
register different image/library data for its OFF and ON states.
S Image/library lamps
The relationship between the properties of an image/library lamp and the dis-
played graphic are indicated below.
- Properties
depending on the OFF color.
[When there is no frame display]
(OFF)
Light
Flash
Lamp alternates
between displayed and
not-displayed states.
Section 7-6