LOGO! Manual
A5E00380835-01
194
Gain and offset parameters
For more information on gain and offset parameters, refer
to Chapter 4.3.6.
Parameter p (number of decimals)
Applies only to the Aen, Ax and n values displayed in a
message text.
Timing diagram
Q
Aen + n
Ax
En
Aen – n
Aen
Functional description
A 0 to 1 transition at input En saves the value of the signal
at the analog input Ax. This saved process variable is re-
ferred to as “Aen”.
Both the analog actual values Ax and Aen are multiplied by
the value at parameter A (gain), and parameter B (offset) is
then added to the product, i.e.
(Ax gain) + offset = Actual value Aen, when input En
changes from 0 to 1, or
(Ax gain) + offset = Actual value Ax.
Output Q is set when the signal at input En = 1 and if the
actual value at input Ax is out of range of Aen n .
Output Q is reset, when the actual value at input Ax lies
within the range of Aen n , or when the signal at input
En changes to lo.
LOGO! functions
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