5 Function blocks
5.1 A, analog value comparator/threshold value switch
136
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
5.1 A, analog value comparator/threshold value switch
An analog value comparator or threshold value switch is used, for example,
to compare analog values or marker contents and switch when defined
threshold values are reached.
easy800 allows the use of up to 32 analog value comparators/threshold
switches.
Contacts and Coils
Example for function block analog value comparator
Figure 102:Wiring the contacts
Parametric programming of the function block inputs/outputs
When using the function block in the circuit diagram for the first time, use
OK to automatically enter the general display of function block parameters,
as shown in the figure on the left. Enter the function block settings here.
The display contains the following elements:
Contacts
Meaning
A ..Q1
Reaching of the comparison result, according to the selected operating mode GT, EQ or LT
A ..CY
Value range exceeded
I 01----A 01Q1-----------------
Ä
Q 01
I 02----A 01CY-----------------S Q 02
A 02 GT +
>I1
>F1
>I2
>F2
>OS
>HY
A 02
Function block analog value comparator number 02
GT
Operating mode: Greater than
+
Parameter set can be called via the PARAMETERS menu
>I1
Comparison value 1, is compared with the comparison value 2 at >I2
Value range: -2147483648 - 2147483647
>F1
Gain factor for >I1 (>I1 = >F1
.
Value)
Value range: -2147483648 - 2147483647
>I2
Comparison value 2 I1
Value range: -2147483648 - 2147483647
>F2
Gain factor for >I2 (>I2 = >F2
.
Value)
Value range: -2147483648 - 2147483647
>OS
Offset (zero point offset) for the value of >I1
Value range: -2147483648 - 2147483647
>HY
Positive and negative switching hysteresis for comparison value I2
Value range: -2147483648 - 2147483647
