Expert
Logger
Controller
type
Loop
(with com-
pensation)
P
I
PI
PD
PID
1. Order
PID
turbance
Dead time and
delay
2. Order
Unsuit-
able
Bad
Worse
than PID
Bad
Setpoint
and dis-
turbance
Delay
1. Order and
small dead
time (delay
time)
Refer-
ence
Unsuit-
able
Inter-
ference
Setpoint
with
delay
time
Dis-
turbance
with delay
time
Higher order
Unsuit-
able
Worse
than PID
A little
worse than
PID
Unsuit-
able
Setpoint
and dis-
turbance
Without com-
pensation and
with delay
Setpoint
(without
delay)
Unus-
able,
unstable
Dis-
turbance
(without
delay)
Refer-
ence
Inter-
ference
4.11.14.2
Controller parameter settings
Various methods have been established to determine controller para-
meters. This introduction describes the Chien, Hrones and Reswik con-
figuration guidelines. You can find further configuration guidelines and
methods in related specialist literature.
Configuration guidelines for control paths with equalisation:
Determine the following control path characteristic values from the control
path step response:
l
Process gain KS
l
Compensation time Tg
l
Delay time TU
l
For systems with dead time, the equivalent dead time Tu + Tt is used in place
of the delay time Tu.
You can specify the controller parameters (reference values) according to
the following table:
144
Delphin Technology AG
Januar 2018
Expert
Logger
Manual