West Control Solutions KS98-1 - Manual (Page 91)

III-1 Scaling and calculating functions
III-1.1 ABSV (absolute value (No. 01))
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y a x a
1 1 0
= × +
The absolute value of a number is it's number without polarity sign. This is the best solution for scaling a value that
can't become negative, in reference to calculating time. This function block should be used, when scaling must not use
a lot of calculating time.
Input variable x1is multiplied by factor a (parameter). Now, constant a0 is added. The absolute value of the resul-
ting value is formed and output at y1.
Example:
y1= ABS(a w x1+ a0 ) a=5
x1=2 a0 = +5 results in y1= 15
y1= ABS(a w x1+ a0 ) a=5 x1=2 a0 = -20 results in y1= 10
Parameter Description Range Default
a Multiplication factor -29 999...999 999 1
a0 Offset -29 999...999 999 0
III-1.2 ADSU ( addition/subtraction (No. 03))
y a x b x c x d x y
1 1 2 3 4 0
= Ч + Ч + Ч + Ч +
Input variables x1...x4 are multiplied by factors a...d. Constant y0 is added to the sum of evaluated inputs. Value
“0" is assigned automatically to unused inputs.
Parameter Description Range Default
a...d Multiplication factors -29 999...999 9990 1
y0 Offset -29 999...999 999 0
9499-040-82711 Scaling and calculating functions
ABSV (absolute value (No. 01)) III-91
x1
A
y1
a0 a
A
x1
x2
x3
x4
y1
y0
a
c
b
d