Rockwell Automation DeviceLogix System User Manual User Manual
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Publication RA-UM003B-EN-P - February 2010
Chapter 2 Navigate the Function Block Editor Interface
Compare Category
The Compare category includes basic comparison functions, including
the the instruction types:
• Greater Than (GRT)
• Greater Than or Equal To (GEQ)
• Equal (EQU)
• Not Equal (NEQ)
• Less Than (LES)
• Less Than or Equal (LEQ)
• Mask (MEQ)
Operation rules [all except Mask (MEQ)]
The conditions and outputs of each function block are described
below.
Data ranges
The valid data ranges for all of these instructions are as follows.
Function Block
Type
Condition
Output
Greater Than (GRT)
Source A > Source B
1
Source A <= Source B
0
Greater Than or
Equal (GEQ)
Source A >= Source B
1
Source A < Source B
0
Equal (EQU)
Source A == Source B
1
Source A != Source B
0
Not Equal (NEQ)
Source A != Source B
1
Source A == Source B
0
Less Than (LES)
Source A < Source B
1
Source A >= Source B
0
Less Than or Equal
(LEQ)
Source A <= Source B
1
Source A > Source B
0
Parameters
Data Range
Source A
-2147483648 ~ 2147483647 (DINT)
-3.402823466e+38F ~ 3.402823466e+38F (REAL)
Source B
-2147483648 ~ 2147483647 (DINT)
-3.402823466e+38F ~ 3.402823466e+38F (REAL)
FaultOption
0, 1, 2