Backlight Off; Turning The Backlight Back On; Backlight Off Function - Omron NT11 - 01-2004 User Manual

Backlight OFF

Switching to the RUN
mode
Reference
Confirming the Communications between the NT11 and the PLC
Reference
3-9

Backlight OFF

3-9-1

Turning the Backlight Back ON

3-9-2

Backlight OFF Function

78
Press the Quit in the System Menu. The start-up screen in the RUN mode will
be displayed.
If the NT11 has failed to start correctly; e.g., the start-up screen is not dis-
played, an error message is displayed, or the screen is not displayed at all,
refer to 6-2 Responding to Displayed Error Messages (page 138) and take
appropriate action.
Execute the PLC program and confirm that the following operations are nor-
mally performed.
• Confirm that the NT11 screens switch according to the PLC program exe-
cution.
If the screens do not switch correctly, check the connection between the
NT11 and the PLC and also check the settings.
Refer to SECTION 2 Hardware Settings and Connections.
• Confirm that the information selected by the NT11 function keys has been
set in the PLC by displaying the contents of the words and bits using a
peripheral tool (CX-Programmer etc.). If the information sent from the
NT11 has not been correctly received by the PLC, check the screen data
settings (specifically the switch settings).
For the details of the screen data creation, refer to the NT-series Support
Tool Operation Manual (V061-E1-1).
The start-up screen must be designated when the screen data is created by
using the support tool. If the start-up screen has not been designated, the
screen with screen number 1 will be displayed. If no screen data has been
registered at screen number 1, the "Screen not registered." error message will
be displayed. For the screen number setting, refer to 4-2 Screen Display
(page 87).
In order to prevent the formation of an afterimage on the screen, and to maxi-
mize the service life of the backlight, the NT11 has a function for turning off
the backlight.
After the backlight has been switched off by actuation of the backlight OFF
function, it will come back on in response to any key operation on the panel of
the NT11, if a screen is switched or redisplayed by the PLC, or if a backlight
ON instruction is received from the PLC.
The backlight will not come back on merely because the numerals or charac-
ters displayed on the screen change.
There are two methods for implementing the backlight OFF function:
• Method whereby the backlight is automatically switched off when there
have been no operations for a set length of time.
(Designated with the memory switches)
• Method whereby the backlight is switched off by an instruction from the
PLC. (Designated in the PT status control area)
Section 3-9