Manual

Operation
4-8
Positioner SIPART PS2/SIPART PS2 PA
C79000-G7476-C150–01
Setpoint turning points (see Fig. 4-6)
Each setpoint turning point can be assigned a flow characteristic value
at intervals of 10%. These points produce a polygon consisting of 10
straight lines which results in an image of the valve characteristic
curve.
Setpoint turning points can only be entered when 10.SFCT = FrEE.
0 102030405060708090
0
0
10
10
20
20
30
30
40
40
50
50
60
60
70
70
80
80
90
90
100
100
100 %
4 6 8 10 12 14 16 18 20 mA
Jw
w
0.5 % 1.5 %
YA = 12 %
YE = 96 %
10.SFCT = 1:50
10.SFCT = lin
10.SFCT = 1:25
10.SFCT = FrEE
e.g. 1:25 inverse
only if 26.YCLS = dW
only if 26.YCLS = uP
25.YNRM =
MPoS
25.YNRM =
FLoW
[%] [%]
99.5 %
98.5 %
SL0 SL1 SL2 SL3 SL4 SL5 SL6 SL7 SL8 SL9 SL10
12 22,5 33 43,5 54 64,5 75 85,5 96
%
w
MPoS
FLoW
Fig. 4-6 Setpoint characteristics, normalization of the manipulated variables and tight closing function
11.SL0 to 21.SL10