Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
540 LCD - LCD Information
after downloading program. You can check the ERR and ERN to see if the
POT value is modified or not. The POT0 operation described above is
identical to POT1.
Instruction Display Window (WND)
WND is set when LCD menu is in U-DISP. The controller also notifies this
status to LCD screen as U-DISP status.
OK key in Customized Display (OK)
OK is set when OK key is pressed. This bit should be cleared so as to get
the next key input. Because once OK key is pressed, this bit is set and
latched until it is cleared by manually. This OK bit is very useful for LCD
instruction. You can use this bit as any input of ladder logic when you
program with several LCD instructions.
ESC key in Customized Display (ESC)
Feature Address Data Format Type User Program
Access
WND - Instruction
Display Window
LCD:0/WND binary (bit) status read-only
Feature Address Data Format Type User Program
Access
OK - OK key in
Customized Display
LCD:0/OK binary (bit) status/
control
read/write
NOTE
OK 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
ESC - ESC key in
Customized Display
LCD:0/ESC binary (bit) status/
control
read/write
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes