Siemens SIMATIC S5 CP 523 User manual

SIMATIC S5
CP 523
Serial I/O Module
Manual
Order No. 6ES5 998-0DD21
EWA 4NEB 811 6044-02a

Only qualified personnel should install or maintain this equipment after becoming thoroughly familiar
with all warnings, safety notices, and maintenance procedures contained in this manual. The successful
and safe operation of this equipment is dependent upon proper handling, installation, operation, and
maintenance.
The following are definitions of the terms “qualified person,” “danger,” “warning,” and “caution,” as
applicable for this document.
Qualified Person
One who is familiar with the installation,
construction, and operation of this equipment and
the hazards involved. In addition, the person
should have the following qualifications:
• Be trained and authorized to use and tag
circuits and equipment in accordance with
established safety practices
• Be trained in the proper care and use of
protective equipment in accordance with
established safety practices
• Be trained in rendering first aid
Indicates loss of life, severe personal injury, or
substantial property damage will result if
proper precautions are not taken.
Indicates loss of life, severe personal injury, or
substantial property damage can result if
proper precautions are not taken.
Indicates minor personal injury or property
damage can result if proper precautions are not
taken.
CAUTION
WARNING
DANGER
Hazardous voltage.
Can cause death, severe
personal injury, or substantial
property damage.
Restrict use to qualified
personnel.
See safety instructions.
WARNING
!
STEP 5®and SIMATIC®are registered trademarks of Siemens AG.
Copyright ©Siemens AG 1989
Second Printing, march 1991
Printed in the Federal Republic of Germany
Siemens has developed this document for its licensees and customers. The information contained herein
is the property of Siemens and may not be copied, used, or disclosed to others without prior written
approval from Siemens. Users are cautioned that the material contained herein is subject to change by
Siemens at any time and without prior notice.
Siemens shall not be responsible for any damages, including consequential damages, caused by reliance
on material presented, including but not limited to typographical, electronic, arithmetic, or listing
errors.

1
2
3
4
5
6
7
8
A/B
Preface
Introduction
System Overview
Hardware Installation
Notes on Operation
Address Assignment
Print Mode
Communications Mode
Using the Function Blocks
Appendices
Index
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Technical Description
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EWA 4NEB 811 6044-02a

CP 523 Preface
Preface
This manual is a revised, updated edition of the original CP 523 manual. The revision was necessary
because the CP 523 has been equipped with an additional communication control procedure, thus
upgrading the number of transmission modes in ”Communications mode” from two to three:
• Transparent mode
• Interpretive mode
• 3964(R) mode (
new )
The characteristics of each mode are discussed in Section 2.3.2.
The CP 523 is a powerful I/O module which can be used in the S5-115U, S5-135U, S5-150U, S5-155U
and S5-115F programmable controllers. In order to make best use of the serial I/O module, you
require comprehensive information. For this reason, the CP 523 serial I/O module has its own
manual dealing only with those facts and examples that are relevant to the module. Demands for
a higher quality of technical documentation have also been met, which means
• Standardization of terminology and notation
• More detailed breakdown of subjects
• Illustration of individual problems
• User-friendly arrangement of the contents
The aim is that both users with little previous experience and SIMATIC S5 experts should find all
the information that they require to work with the CP 523.
However, the applications are so numerous that not all the problems that might occur can be dealt
with in one manual. For other problems, please ask your Siemens representative for advice.
EWA 4NEB 811 6044-02a v

CP 523 Introduction
Introduction
It is important to study the introduction carefully before reading the rest of the manual. This will
help you to use the manual and will save you time.
Description of Contents
This manual is a comprehensive description of the CP 523. The manual can be divided into blocks
according to topics.
• Description
- The "System Overview" contains information on the tasks the module can perform and on
how the module is used in the S5-115U, S5-135U, S5-150U, S5-155U and S5-115F.
- The "Technical Description" contains general information on the principle of operation of
the module, technical specifications, details of the serial interface and input/output (I/O)
modules and a list of accessories.
• Installation and operation
- The chapter on "Hardware Installation" tells you which programmable controllers and
expansion units the module can be used with, how it is assembled and how to connect it to
a printer or I/O module (connector pin assignments and terminal diagrams).
- "Notes on Operation" describes the restart characteristics and actual operation. This
chapter also contains the error messages that can occur during startup.
• Addressing
This chapter demonstrates how to address the module and describes the function of the
transfer memory.
• Functional description
We have devoted a separate chapter to the "Print mode" and the "Communications mode".
Each of these chapters contains the information necessary for programming the module for
the relevant mode. This saves you time-consuming searches in the manual.
• Appendix A: Summary
All the information you require to operate the CP 523 has been gathered together here in list
form. This has been designed for those users who have read the manual and wish to find some
brief item of information quickly.
EWA 4NEB 811 6044-02a vii

Introduction CP 523
Conventions
In order to improve the readability of the manual, a menu-style breakdown has been used, i.e.:
• The individual chapters can be quickly located by means of a thumb register.
• There is an overview containing the headings of the individual chapters at the beginning of
the manual.
• Each chapter is preceded by a breakdown of its subject matter.
The individual chapters are subdivided into sections and subsections. Boldface type is used for
further subdivisions.
• Pages, figures and tables are numbered separately in each chapter. The page following the
chapter breakdown contains a list of the figures and tables appearing in that particular
chapter.
Certain conventions were observed when writing the manual. These are explained below.
• A number of abbreviations have been used.
Example: Central processing unit (CPU)
• Footnotes are identified by superscripts consisting of a small digit (e.g. ”1”), or ”*”. The actual
footnote is generally at the bottom left of the page or below the relevant table or figure.
• Cross-references are shown as follows:
”( 7.3.2)" refers to subsection 7.3.2.
No references are made to individual pages.
• All dimensions in drawings etc. are given in millimetres/inches (mm/in.).
• Information of particular importance is framed in
grey-bordered rectangles.
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• All program examples have been generated in statement list form and always refer to the
same slot.
• All data in connection with the programmer refers to the German version of the PG 685. The
relevant user manual contains a detailed description of programming procedures with this
programmer.
• The ”Reader's Note” in Section 7 provides references to various subsections, thus making it
easier to find the subsections relevant to your application or specific requirements.
Manuals can only describe the current version of the device or unit. Should modifications or sup-
plements become necessary in the course of time, a supplement will be prepared and included in
the manual the next time it is revised. The relevant version or edition of the manual appears on
the cover. The present manual is edition "1". In the event of a revision, the edition number will be
incremented by "1".
At the end of the manual you will find correction forms. Please enter in these forms any
suggestions you may have in the way of improvements or corrections and send them to us. Your
comments will help us to improve the next edition.
viii EWA 4NEB 811 6044-02a

CP 523 Introduction
Courses
Siemens provide SIMATIC S5 users with extensive opportunities for training.
For more information, please contact your Siemens representatives.
Reference Literature
This manual is a comprehensive description of the CP 523 serial I/O module. Topics not specific to
the CP 523, however, are only briefly dealt with. You will find more detailed information in the
following literature:
• Programmable Controllers
Volume 1: Logic and Sequencing Control; From the Task to the Program.
Günter Wellenreuther, Dieter Zastrov
Braunschweig 1987
Contents:
- Method of operation of a programmable controller
- Theory of control technology using the STEP 5 programming language for the SIMATIC S5
programmable controllers.
Order No.: ISBN 3-528-04464-0
•Automating with the S5-115U
SIMATIC S5 Programmable Controllers
Hans Berger
2nd Edition, Berlin and Munich: Siemens AG, 1989
Contents:
- STEP 5 programming language
- Program scanning
- Integral program blocks
- I/O interfaces
Order No.: ISBN 3-8009-1526-X
EWA 4NEB 811 6044-02a ix

CP 523 Introduction
Conventions
The following conventions are used in this book and are listed for your reference:
Convention Definition Example
A box that indicates a type of hazard,
describes its implications, and tells you
how to avoid the hazard is a cautionary
statement. Some cautionary statements
include a graphic symbol representing
an electrical or radio-frequency hazard.
All cautionary statements have one of
the following levels of caution:
• A danger indicates that loss of
life, severe personal injury, or
substantial property damage
will result if proper precautions
are not taken.
• A warning indicates that loss of
life, severe personal injury, or
substantial property damage
can result if proper precautions
are not taken.
• A caution indicates that minor
personal injury or property
damage can result if proper
precautions are not taken.
EWA 4NEB 811 6044-02a xi

2 Technical Description
3 Hardware Installation
4 Notes on Operation
5 Address Assignment
6 Print Mode
7 Communications Mode
8 Using the ”SEND” and ”RECEIVE” Function blocks
1 System Overview
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EWA 4NEB 811 6044-02a

Figures
1-1. S5-115U Programmable Controller with CP 523 and Printer . . . . . . . . . . . . . 1 - 1
1-2. S5-115U Programmable Controller with CP 523 and Terminal . . . . . . . . . . . . 1 - 2
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EWA 4NEB 811 6044-02a