Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
192 Compare Instructions
GEQ - Greater Than or
Equal To
LEQ - Less Than or Equal
To
Instruction Type: input
The GEQ instruction is used to test whether one value is greater than or
equal to a second value. The LEQ instruction is used to test whether one
value is less than or equal to a second value.
LES A ≥ Bfalse
A < Btrue
IMPORTANT
Only use the High Speed Counter Accumulator (HSC.ACC) for Source A in
GRT, LES, GEQ and LEQ instructions.
GRT and LES Instruction Operation
Instruction Relationship of Source Values Resulting Rung State
GEQ
Grtr Than or Eql (A>=B)
Source A N7:0
0<
Source B N7:1
0<
GEQ
LEQ
Less Than or Eql (A<=B)
Source A N7:0
0<
Source B N7:1
0<
LEQ
Execution Time for the GEQ and LEQ Instructions
Controller Instruction Data Size When Rung Is:
True False
MicroLogix 1400 GEQ word 1.0710 µs 0.2228 µs
long word 1.0601 µs 0.2242 µs
LEQ word 1.0640 µs 0.1847 µs
long word 1.0364 µs 0.1851 µs
GEQ and LEQ Instruction Operation
Instruction Relationship of Source Values Resulting Rung State
GEQ A ≥ Btrue
A < B false
LEQ A > B false
A ≤ B true
IMPORTANT
Only use the High Speed Counter Accumulator (HSC.ACC) for Source A in
GRT, LES, GEQ and LEQ instructions.
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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