Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
182 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.
MEQ - Mask Compare
for Equal
Instruction Type: input
IMPORTANT
Only use the High Speed Counter Accumulator
(HSC.ACC) for Source A in GRT, LES, GEQ and LEQ
instructions.
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 Data Size When Rung Is:
True False
MicroLogix 1100 word 8.96 μs 0.87 μs
long word 9.09 μs 0.87 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.
MEQ
Masked Equal
Source N7:0
0<
Mask N7:1
0000h<
Compare N7:2
0<
MEQ
Execution Time for the MEQ Instructions
Controller Data Size When Rung Is:
True False
MicroLogix 1100 word 36.0 μs0.9 μs
long word 36.65 μs0.9 μs
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix