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Programming wiring
MN05013005E
158
Analog value comparator/threshold value switch
EZD provides 32 analog value comparators from A 01 to
A 32.
With an analog value comparator or threshold value switch
you can, for example, compare analog input values with a
setpoint value.
All EZD DC variants have analog inputs.
The following comparisons are possible:
• Function block input
>I1
greater than or equal to, equal
to, less than or equal to
function block input
>I2
• Using the factors
>F1
and
>F2
as inputs enables you to
amplify and adjust the values of the function block inputs.
• The
>OS
function block input can be used as an offset for
the
>I1
input.
• The
>HY
function block input is used for the positive and
negative switching hysteresis of the input
>I2
. The contact
switches according to the selected comparison mode of the
function block.
J
Attention!
The function blocks are designed so that a function block
output can be assigned directly to the input of another
function block. This enables you always to have an
overview of which value is transferred.
If different data formats are used, such as if the first function
block uses 32 bits and an 8-bit or 16-bit format is used for
further processing, sign value errors or value errors may
occur when transferring from one function block to another
one.
