Publication 1766-RM001A-EN-P - October 2008
LCD - LCD Information
541
ESC is set when ESC key is pressed. This bit should be cleared so as to get
the next key input. Because once ESC key is pressed, this bit is set and
latched until it is cleared by manually. This ESC bit is very useful for LCD
instruction. You can use this bit as any input of ladder logic when you
program with several LCD instruction.
LCD Backlight On/Off (BACKON)
LCD Backlight On/Off (BACKON) specifies whether to turn the backlight
on or off. When this bit is set (1), the LCD backlight turns on. Otherwise,
the backlight always off.
LCD Backlight Time (BACKTIME)
LCD Backlight Time (BACKTIME) specifies the backlight timer period.
When this bit is set to zero (0), the default backlight timer period of 30
seconds applies. When set to (1), the backlight is always on.
LCD contrast (CNST)
NOTE
ESC bit is presented for handy interface to LCD instruction and keypad, so it
is just updated in U-DISP screen.
Feature
Address
Data Format
Type
User Program
Access
BACKON - LCD Backlight
on/off
LCD:0/BACKON
binary (bit)
control
read/write
Feature
Address
Data Format
Type
User Program
Access
BACKTIME - LCD
Backlight timer
LCD:0/BACKTIME binary
(bit)
control
read/write
Feature
Address
Data Format
Type
User Program
Access
CNST - LCD Contrast
LCD:0/CNST
word (INT)
control
read/write
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