Lamps; Lamp Functions - Omron NT20S-ST121B-EV3 User Manual

Lamps

4-6

Lamps

4-6-1

Lamp Functions

Lamp Attributes
150
The NT20 has the "lamp" function used to simply display the PLC bit status.
This section describes the lamps which can be displayed.
The lamp display status (lit (flashing) or unlit) can be changed by instructions
from the PLC/host.
For details on how to change the status of a currently displayed lamp, refer to
5-3-2 Turning ON (Lit) and OFF (Unlit) the Lamps (Changing the Contents of
Allocated Bits) on page 192, Lamp and Touch Switch Display (Bit Specifica-
tion) on page 223, and Lamp and Touch Switch Display (Number Specifica-
tion) on page 223.
The lamps are the graphic areas whose method of display can be changed by
using the PLC. Available display methods are "lit", "unlit", and "flash". Up to
128 lamps can be registered in one screen.
The display status (lit, unlit, and flashing) which are registered when creating
the screen data can be switched according to the ON/OFF of the PLC bit sta-
tus.
Unlit
The following attributes can be set with the lamp. Use the Support Tool to set
the lamp attributes.
• Shape
Select from the square and circle shapes. The display size can be freely
selected.
Square Circle
• Frame
Select whether or not the boundary line (frame) of the lamp display area is
displayed. If the frame is not set, only the guide display message for the
lamp is displayed when the lamp is not lit (or flashing). If the guide display
message is not set, nothing is displayed.
• Lit and Flashing
Select whether the lamp is lit (reverse display) or flashing (reverse flashing)
when the lamp is turned ON by the PLC.
• Guide Display Message
Lamps can be displayed with the guide display messages.
The guide display message attributes are the same as that for the "charac-
ter display". Refer to Characters and Figures Which Can Be Displayed on
page 144.
• Frame and Lit/Flashing
The display method of "lit/flashing" varies according to the frame setting.
PLC
Lit
Section 4-6