DESCRIPTION AND OPERATION
FUNCTIONAL OPERATION
WBPEEUI110505A0
2 - 11
Function Generator
The function generator is a curve consisting of six straight line
segments programmed into the transmitter via the Type STT
terminal. This makes it possible to program the output to fol-
low the input in a way that is specific to a certain application.
The first and last points of the curve (P0 and P6) are pre-
defined at zero-percent input and output, and 100-percent
input and output respectively. The other five points (P1, P2,
P3, P4, and P5) are user defined. Refer to
of this
instruction and the
Type STT Smart Transmitter Terminal
for more information on the function generator.
Figure
shows a function generator used to control the out-
put of a transmitter. This transmitter is connected to a tank
with a varying shape. The function generator makes it possible
to approximate the changes in shape of the tank, and thus to
track the volume of the liquid in the tank.
Figure 2-9. Function Generator Example
N OTE : P 0 A N D P 6 A R E P R E D E FIN E D.
P 1 TH R O U G H P 5 A R E E N TE R E D
D U R IN G C O N FIG U R ATIO N .
A LL VA LU E S S H OW N A R E
P E R C E N TAG E IN P U T A N D
O U TP U T P x (% IN , % O U T)
IN P U T F T H 0 (% )
2
O U T P U T m A (% )
P 3, P 4, P 5, P 6 (100, 100)
P 2 (5 0, 40)
P 1 (3 0, 10)
P 0 (0 , 0)
20
(100)
20
(100.00)
16
(75.00)
12
(50.00)
8
(25.00)
4
(0.00)
18
(90)
16
(80)
14
(70)
12
(60)
10
(50)
8
(40)
6
(30)
4
(20)
2
(10)
0
(0)
1 0 0 % F U L L
P 3
P 2
P 1
P 0
P 1
P 2
P 3
T R A N S M IT T E R
T02201A
Содержание Platinum standard Series
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