West Control Solutions KS98-1 - Manual (Page 99)

III-2.3 CHAR (function generator (No. 21))
With max. 11 adjustable value pairs, non-linear functions can be simulated or linearized. Each value pair comprises in -
put
x(1) and output y(1). The number of value pairs is determined using configuration parameter Seg (number of seg-
ments +1 corresponds to the number of value pairs).
The value pairs are connected automatically with straight lines so that each input value x1 provides a defined output
value y1. If input value x1 is smaller than parameter x(1), the output value is equal to the value of y(1). If input
value x1 is higher than the highest parameter x(n) the output value is equal to the corresponding y(n) value.
During entry of the configuration parameters, the condition is that the assigned values stand in ascending order
(
x(1) < x(2) <...< x(11)).
Configuration Description Range Default
Seg Number of segments 1...10 2
x(1)...(11) Input value for curve point -29 999...999 999 0...10*
y(1). .. (11) Output value for curve point -29 999...999 999 0...10*
* 0 for x(1) and y(1), 1 for x(2) and y(2) ... 10 for x(11) and y(11).
Unless one CHAR is sufficient, the following tip might be helpful:
whereby x10 of CHAR I = x1 of CHAR II and x11 of CHAR I = x2 of CHAR II
9499-040-82711 Non-linear functions
CHAR (function generator (No. 21)) III-99
x1 y1
y
x
( 10) ß
1
2
3
4
5
6 7
8 9 10
y1
y2
y11
x1 x2 x11
...
...
Seg
x11/y11
x1/y1
CHAR II
CHAR I
I
II
CHAR
CHAR
ADSU x2/y2
CHAR I+II
x10/Y10
Fig. 110