Expert
Logger
Controller
type
Aperiodic control pro-
cess
(no overshoot)
Control process with approx-
imately 20% overshoot
Optimise:
Interference Reference Interference
Reference
P
K » 0.3 * Tg
/ Tu
K » 0.3 *
Tg / Tu
K » 0.7 * Tg / Tu
K » 0.7 * Tg / Tu
PI
K » 0.6 * Tg
/ Tu
TN » 4 * Tu
K » 0.35 *
Tg / Tu
TN » 1.2 *
Tg
K » 0.7 * Tg / Tu
TN » 2.3 * Tu
K » 0.6 * Tg / Tu
TN » Tg
PD
K » 0.95 *
Tg / Tu
TN » 2.4 *
Tu
TV » 0.42 *
Tu
K » 0.6 *
Tg / Tu
TN » Tg
TV » 0.5 *
Tu
K » 1.2 * Tg / Tu
TN » 2 * Tu
TV » 0.42 * Tu
K » 0.95 * Tg /
Tu
TN » 1.35* Tg
TV » 0.47 * Tu
Configuration guidelines for control paths without equalisation:
Determine the following control path characteristic values from the control
path step response:
l
Integral gain KI
l
Delay time TU
You can specify the controller parameters (reference values) according to
the following table:
Controller type
K
TN
TV
P
0.5 / (KI * Tu)
–
–
PD
0.5 / (KI * Tu)
–
0.5 * Tu
PI
0.42 / (KI * Tu) 5.8 * Tu –
PID
0.4 / (KI * Tu)
3.2 * Tu 0.8 * Tu
4.11.14.3
Configuring PID controllers
The controller is specifically configured in tabs “Main settings”, “Controller
1” and “Controller 2”.
Settings in tabs “Controller 1” and “Controller 2” are only required for spe-
cific applications.
The controller channel obtains its input values (setpoint variable ”W” and
process variable “X” from two HW channels or SW channels of the device).
The controller yields the manipulated variable “Y” as the output value in
the preset value range 0...100% or -100..+100%. If you link the output of
145
Delphin Technology AG
Januar 2018
Expert
Logger
Manual