Eaton easyE4 User Manual

6. Function blocks
6.1 Manufacturer function blocks
6.1.3.4 CP – Comparator
This function block is used to compare variables and/or constants with each other.
General
easyE4 base devices provide 32 comparator function blocks
(Compare) CP01 to CP32.
Comparators are used to compare variables and constants
with each other and output the relationship between them:
Less than / Equal to / Greater than.
Operating principle
The function block compares values present at the inputs I1 and I2. The following
contacts close depending on the comparison result:
l
I1 greater than I2, GT contact closes.
l
I1 equal to I2, EQ contact closes.
l
I1 less than I2, LT contact closes.
The function block and its parameters
Function block inputs
 Description Note
(bit) 
EN
1: Activates the function block.
The checkbox for the
Function block release by EN is neces-
sary
parameter must first be enabled
(DWord) 
I1
Comparison reference value
Integer value range:
-2,147,483,648 to +2,147,483,647

I2
Comparison value
Assigning operands
You can assign the following operands to the function block inputs that are numeric
inputs.
Operands Value inputs
Constant, timer constant
1)
x
MD, MW, MB - Markers
x
NB, NW, ND - NET markers
2)
x
nNB, nND, nND- NET markers
2)
NET station n
x
IA - Analog input
x
QA - Analog output
x
QV - QV - Numeric output of a FB
x
1)
Only on function blocks T, AC
2)
Only on projects with ≥ 2 base devices on NET
easyE402/24 MN050009ENEaton.com
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Eaton easyE4 Specifications

General

Brand	Eaton
Model	easyE4
Category	Relays
Language	English