1 General Part -- Fundamental control technology terms
Manual
SIPART DR21
C73000-B7476-C143-08
13
Kp Proportional gain
Tn Integral action time
xd System deviation
Δ
y Manipulated variable of controller
y
Manipulated variable of motor
Tn
Kp
·
xd
y
Δ
y
t
t
Figure 1-8 Transient function and parameters of the three-position step controller
D
Continuous controller
The controller output 0 to 20 mA or 4 to 20 mA acts on the final control element via an
electropneumatic signal converter or an electropneumatic positioner.
2
w
xd
3
1
x
y
-
4
0 to 20 mA
(4 to 20 mA)
0.2 to 1 bar
w
Command variable
x
Controlled variable
xd System deviation
y
Manipulated variable
1
Transmitter
2
Stepoint adjuster
3
Control amplifier
4
Electropneumatic signal
converter
5
Pneumatic actuator
Figure 1-9 Function diagram of continuous controller
This type of controller is preferentially used in the chemical industry.
Summary of Contents for SIPART DR21
Page 1: ...SIPART DR21 C73000 B7476 C143 08 1 SIPART DR21 6DR 210 Edition 08 2010 Manual ...
Page 2: ...SIPART DR21 C73000 B7476 C143 08 2 ...
Page 148: ...4 Installation 4 2 Electrical Connection Manual 148 SIPART DR21 C73000 B7476 C143 08 ...
Page 180: ...5 Operation 5 5 CPU self diagnostics Manual 180 SIPART DR21 C73000 B7476 C143 08 ...
Page 242: ...Manual 242 SIPART DR21 C73000 B7476 C143 07 ...