Siemens SIPART DR24 - Page 82

1 Technical Description
1.5 Functional Description
1.5.8 Complex Functions (Arithmetic blocks c, d, h)
Manual
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SIP ART DR24 6DR2410
C79000-G7476-C153-03
The signal applied to the control inputs can be specified for example by the function
transmitter FUL as a curve line.
The parameter values and the value of the controlling variable can be gained by
adaptation (see under adaptation).
- Restart conditions
Power on yp
YO Y
It=0
y
D
yz
y
p
Auto 0 ... 100 %
I
t
=
0
y
D
y
bAtt n = no kp ⋅ xdP -kp ⋅ xdP - yz 0 ... 100 % -kp ⋅ xdP - yz 0% yz
bAtt = YES kp ⋅ xdP y
L
-kp⋅ xdP - yz 0 ... 100 % y
L
-kp⋅ xdP - yz 0% yz
This gives for the manipulated variable in automatic mode ya when turning on:
Power on PI(D) controller
P(D) controller yo = Auto P(D) controller yo = 0...100 %
bAtt n = no 10 % 10 % kp ⋅ xdP + yo + yz
bAtt = YES y
L
y
L
kp ⋅ xdP + yo + yz
y
L
= last manipulated variable before turning off
If other startup conditions are desired, the startup behavior can be influenced specifically
by additional connection, e.g. x--tracking and tracking operation if necessary as a function
of the data source rES1, rES2.