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Compact Controller
SIPART DR20
Project Planning Manual

Order No. 6ZB5600-0AAO2-0BA0

02.05

Project Planning Manual

SIPART DR20

empty page

2

SIPART DR20

Project Planning Manual

SIPART DR20
Project Planning Manual

This edition 1990 of the Project Planning Manual describes the SIPART DR20 compact
controller in the design with software version A09 (see page 91).This device can be used
to implement all functions which have already been described in earlier documents. A
number of function extensions have been made compared to earlier devices; these are
especially identified.

Notice
The controller SIPART DR20 is powered by electricity. Certain components within electrical
instruments are by necessity subject to very high voltages. Serious physicalinjury or damage to
property / equipment may ensue if the hints in this manual are ignored. Only suitable qualified
personnel should use this controller. The trouble-free and safe operation depends on proper
transport, professional storage, as well as careful operation and maintenance.

Subject to change

SIPART, TELEPERM, SIMATIC and COROS are registered trade marks
of the SiemensAktiengesellschaft

3

Project Planning Manual
Contents

SIPART DR20
Page
5
5
5
5
6

1.
1.1
1.2
1.3
1.4

Fundamental Control Technology Terms
Control Loop
Sensors and Transmitters
Final Control Elements and Actuators
Controllers

2.
2.1
2.2

The SIPART DR20 Controller
Application
Operation and Display Functions

10
10
11

3.
3.1
3.1.1
3.1.2
3.1.3
3.2
3.2.13.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7

Technical Description
Hardware
Front Module
Basic Circuit Board
Additional Modules (Options)
Software
Input Signal Processing
Input Signal Processing and Switchover
Control Algorithm
Output Signal Processing and Switchover
Restart Conditions
Optical Signalling of Functions and Operating State
Bus Interface

13
13
14
15
16
18
22
25
4346
58
58
60

4.

Technical Data

62

Mounting

70
70
70
71
71

5.
5.1
5.2
5.2.1
5.2.2

Mechanical Installation
Electric Connection
Wiring
Serial Interface and Bus Driver

6.
6.1
6.2
6.3
6.4
6.5
6.6
6.7

Adjustments and Operation
Process Operation
Parameterization
Configuring
Lamp Test
Display of Software Version
Further Information
Standard MeasuringRanges for Temperature
Measurements Using Thermocouples

87
87
88
89
91
91
91
93

7.
7.1
7.2
7.3

Commissioning
Matching to Direction of Action
Matching of Step Controllers to Final Control Elements
Optimization Guidelines

95
95
96
97

8.

Abbreviations

100

9.

Ordering Data

101

10.

SIPART Controllers in Systems

102

11.

Representation ofVarious Setpoints

103

12.

Planning Examples

108

4

SIPART DR20

1.

Project Planning Manual

Fundamental Control Technology Terms

1.1

Control Loop

An automatic control system has the function of bringing the output variable x of a controlled
system to a predetermined value and to maintain this value against the influence of disturbances z.
With digital controller,the controlled variable x is measured cyclically and compared with the
command variable w. The resulting negative deviation xd = w - x is processed in the controller to
form the manipulated variable y which acts on the controlled system.

z1 z2 z3

w
x
xd
y
z

1
x
w

2
xd

1.2

1
2

Controlled system
Controlling means

y

-

Fig.1/1

Command variable
Controlledvariable
Negative deviation
Manipulated variable
Disturbance variables

Block diagram of a control loop

Sensors and Transmitters

The controlled variable may be any physical quantity. Frequently encountered variables in process
engineering are e.g. pressure, temperature, level and flow.
Certain sensors such as resistance thermometers, resistance transmitters and thermocouples can
be...
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