Deif GPC-3 Designers Reference Handbook

P-part
(Kp)
I-part
(Ti)
D-part
(Td)
OutputSet point Σ Σ
-
++
+
 








 sTd
sTi
Kp
1
1sPID
As illustrated in the above drawing and equation, each regulator (P, I and D) gives an output which is sum-
marised to the total controller output.
The adjustable settings for the PID controllers in the GPC-3 unit are:
Kp: The gain for the proportional part.
Ti: The integral action time for the integral part.
Td: The differential action time for the differential part.
The function of each part is described in the following.
6.2 Proportional regulator
When the regulation deviation occurs, the proportional part will cause an immediate change of the output.
The size of the change depends on the gain Kp.
The diagram shows how the output of the P regulator depends on the Kp setting. The change of the output at
a given Kp setting will be doubled if the regulation deviation doubles.
GPC-3 DRH 4189340587 UK PID controller
DEIF A/S Page 103 of 122

Deif GPC-3 Specifications

General

Brand	Deif
Model	GPC-3
Category	Controller
Language	English