Delphin ProfiMessage, Hardware Manual

Page: 120 / 322

Profi Message
Generate intermediate values (only with block averaging): When enabled, the res-
ults between the trigger events are immediately output after calculation (with each
new source value).
Refer also to
Trigger options .
4.7.14
PID controller
The PID controller channels enable the continuous control of a process variable.
Available controllers are P, I, PI and PID. Additional settings are also available, e.g.
dead zone, manipulated variable limit etc.
Topics
4.7.14.1
Introduction to control technology
This Section gives you an introduction to control technology in order to help you
understand the PID controller.
Topics
4.7.14.1.1 Designations
Control loop variables
w – reference variable. Process variable setpoint or target value.
y – manipulated variable. Controller output value.
x – control variable. Process variable to be controlled. .
xd – control difference or control deviation. Xd = W –X
z – interference variable. Interference influence on process variable by process.
Control loop with controller and control paths:
Control parameter
Kp – proportional amplification. For controller P component.
Tn – reset time. For controller I component.
Tv – derivative time. For controller D component.
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Delphin Technology AG
Dezember 2015
Profi Message Manual