Omron NT15S, Operation Manual

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38
The Terminals of the NT-Series
Section 1-7
1.7.3 NT18S-SF121B-E
Overview of the technical data:
Type : LCD-Module
Resolution: 240 x 128 Dots
Graphics Capability: Full Graphics Capability
Backlight : LED-Backlight
Background Colour : White
Lines (Font Normal) : 16
Characters/Line (Font Normal) : 40
Character Matrix (Font Normal) : 6 x 8 Dots
Character Matrix (Font Zoom) : 12 x 16 Dots
Dot Colour : Black
Dot Size : 0.49 mm x 0.49 mm
Dot Gap Size : 0.04 mm
Visible Display Size : 131.0 mm x 72.0 mm
1.7.4 Contrast Setting
The contrast for the display can be adjusted by means of the software. This re-
quires the system variable LCDContrast to be set up in an I/O mask of the applica-
tion. The value can then be modified using any editor that can handle integer num-
bers.
The limit values for the contrast must be set to
Lower level: -25
Upper level: +70
If this variable is not defined in the menus or the value is out of the range of values,
the default setting (value 25) will be loaded when the system is initialized.
The system variable can be stated in any I/O-mask of the application!
1.7.5 Default Contrast Setting
If the contrast of the display should be such that the masks are no longer legible, the
default contrast setting can be restored using the user mode switch.
Position of the switch to restore the contrast:
S1 ON
S2 OFF
S3 OFF
S4 ON
This switch position coincides with ‘activating download by hardware’. The contrast
will be reset before the warning is displayed. The warning will be displayed in a
legible manner. Upon display of this warning, switch off the terminal, set the switch
4 to the OFF-position and switch the terminal on again. The application description
is not lost.