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Program Controller SE-707
© 2018 by STANGE Elektronik GmbH
116
Subject to technical modifications
3) Jump response of the controlled
At first data of the control section must be ascertained. For this purpose in the MANUAL-Y mode there is effected a jump of
the Manipulated Variable Y from 0 to 100 %.
100 %
Y
0 %
Time t
X-Max
(%)
X
Act. value
Tu
Settings for the control parameters:
Controller type
Xp (%)
Tn
Tv
PID
Xp = 1,7 x F
Tn = Tg
Tv = 0,5 x Tn
PI
Xp = 2,9 x F
Tn = 1,2 x Tg
0
Parameters automatically determined are registered under the just selected parameter set.
Tg
∆
x
∆
t
Yn
Time t
Legend:
Yn
= Manip. Variable range
Y
= Manipulated variable
Tu
= Delay time
Tg
= Compensation time
Tg =
∆
t x Xmax
∆
x
Xmax
= Maxim. value of controlled system
Xn
= Adjustment range of the controller
in the dimension of X (actual value)
Example:
If a Y modification of 10 % causes a
modification of 280 °C (= 20 % of Xn)
in a control range of 0..1400 °C, then
Xn = 2800 °C
Vmax
= Maximum slewing rate of the con-
trolled variable
Vmax = Xmax =
∆
x
Tg
∆
t
(F =
Xn
V
max
x Tu x 100 %)
(see also the following table)