Siemens Simatic S7-300 Assembly Instructions

Preface, Contents
Product Overview 1
Mechanical Configuration 2
Addressing the S7-300 Modules 3
Electrical Configuration 4
Installing an S7-300 5
Wiring an S7-300 6
Configuring an MPI or
PROFIBUS Subnet 7
Preparing an S7-300 for
Operation and Start-up of
PROFIBUS-DP 8
Changing the Backup Battery/
Rechargeable Battery, Module
and Fuses 9
CPUs 10
CPU 315-2 DP as DP Master/
DP Slave 11
Cycle Time and Response Time
of the S7-300 12
Appendices
Glossary, Index
Edition 2
EWA 4NEB 710 6078-02a
S7-300 Programmable Controller
Installation and Hardware
Manual
SIMATIC
This Manual is Part of the Documentation Package
with the Order Number:
6ES7 398-8AA02-8BA0

ii
S7-300, Installation and Hardware
EW A 4NEB 710 6078 02
This manual contains notices which you should observe to ensure your own personal safety, as
well as to protect the product and connected equipment. These notices are highlighted in the
manual by a warning triangle and are marked as follows according to the level of danger:
!Danger
indicates that death, severe personal injury or substantial property damage will result if proper
precautions are not taken.
!Warning
indicates that death, severe personal injury or substantial property damage can result if proper
precautions are not taken.
!Caution
indicates
that minor personal injury or property damage can result if proper precautions are not taken.
Note
draws
your attention to particularly important information on the product, handling the product, or
to a particular part of the documentation.
Only qualified personnel should be allowed to install and work on this equipment. Qualified
persons are defined as persons who are authorized to commission, to ground, and to tag circuits,
equipment, and systems in accordance with established safety practices and standards.
Note the following:
!Warning
This device and its components may only be used for the applications described in the catalog or the
technical description, and only in connection with devices or components from other manufacturers
which have been approved or recommended by Siemens.
This
product can only function correctly and safely if it is transported, stored, set up, and installed
correctly, and operated and maintained as recommended.
SIMATIC and SIMATIC NETare registered trademarks of SIEMENS AG.
Third
parties using for their own purposes any other names in this document which refer to trade -
marks might infringe upon the rights of the trademark owners.
We have checked the contents of this manual for agreement with the
hardware and software described. Since deviations cannot be pre -
cluded
entirely , we cannot guarantee full agreement. However , the
data in this manual are reviewed regularly and any necessary
corrections included in subsequent editions. Suggestions for im-
provement
are welcomed.
T echnical data subject to change.
 Siemens AG 1994
Disclaimer of Liability Copyright  Siemens AG 1994 All rights reserved
The reproduction, transmission or use of this document or its
contents is not permitted without express written authority.
Offenders will be liable for damages. All rights, including rights
created
by patent grant or registration of a utility model or design, are
reserved.
Siemens
AG
Automation Group
Industrial Automation Systems
P .O. Box 4848, D-90327 Nuremberg
Siemens Aktiengesellschaft
Safety Guidelines
Qualified Personnel
Correct Usage
Trademarks

iii
S7-300, Installation and Hardware
EW A 4NEB 710 6078-02a
Preface
The information contained in this manual will help you with the following:
 Install and wire an S7-300 programmable controller , and
 Look up operator entries, functional descriptions and the technical speci -
fications relevant to the S7-300’ s CPUs.
Y ou will find the function descriptions and technical specifications for the
signal modules, power supply modules and interface modules in the Mod-
ule Specifications Refer ence Manual.
This documentation package with the order number 6ES7 398-8AA02-8BA0
comprises two manuals and an instruction list with the following contents:
S7-300 Programmable Controller ,
Hardware and Installation
 Mechanical and electrical config -
uration
 Installation and wiring
 Preparing the S7-300 for opera -
tion
 Characteristics and technical
data for the S7-300 CPUs
 General technical data
 Power supply modules
 Digital modules
 Analog modules
 Order numbers for
S7-300
S7-300, M7-300 Programmable
Controllers, Module Specifications
Instruction List
 Instruction set for all CPUs
 Brief description of instruc -
tions and execution times
in relation to the individual
CPUs
A detailed description of all in -
structions with examples can
be found in the STEP 7 Manu -
als (see Appendix G).
Y ou can also order the Instruc -
tion List separately:
6ES7 398-8AA02-8BN0
Purpose of this
Manual
Documentation
Package

iv S7-300,
Installation and Hardware
EW A 4NEB 710 6078-02a
This manual applies for the following CPUs:
CPU Order No. From
Version
CPU 312 IFM 6ES7 312-5AC01-0AB0 01
CPU 313 6ES7 313-1AD02-0AB0 01
CPU 314 6ES7 314-1AE03-0AB0 01
CPU 314 IFM 6ES7 314-5AE02-0AB0 01
CPU 315 6ES7 315-1AF02-0AB0 01
CPU 315-2 DP 6ES7 315-2AF02-0AB0 01
CPU 316 6ES7 316-1AG00-0AB0 01
This manual describes all modules that are valid at the time the manual is
released. For new modules or newer versions of modules, we reserve the op -
tion to add to the manual a product information containing the current infor -
mation on this module.
The following changes have been made since the previous version ( S7-300
Pr
ogrammable Contr oller , Har dwar e and Installation Manual , Order No.
6ES7 398-8AA01-8BA0, Edition 1):
 The CPU 316 has been included in the manual
 The CPUs have been expanded with the following functions:
– 19.2 kbaud for the MPI
– Forcing of variables
– SFC “RD_DP ARM”
–
Password protection
– Cycle time limiting for test functions
– HOLD mode
– Downloading of a user program from the programming device via the
CPU onto a memory card and the possibility of updating the operating
system via memory card (not for CPUs 312 IFM and 314 IFM).
The S7-300 programmable controller meets the requirements and criteria of
standard IEC 1 131, Part 2. The S7-300 meets the requirements for the CE
mark. Approvals for CSA, UL and FM have been granted for the S7-300.
See Appendix A for detailed information on standards and approvals.
Scope of this
Manual
Changes Since the
Previous V ersion
Standards and Ap -
provals
Preface

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S7-300, Installation and Hardware
EW A 4NEB 710 6078-02a
The SIMA TIC S7-300 is an environmentally-friendly product!
The essential features of the SIMA TIC S7-300 include:
 A halogen-free flameproofing of the plastic housing despite its high level
of fireproofing
 Laser labeling (that is, no paper labels)
 Plastics materials labeled in accordance with DIN 54840
 Reduction in materials used thanks to more compact design and fewer
components through integration in ASICs
The SIMA TIC S7-300 can be recycled thanks to the low level of pollutants in
its equipment.
Please contact the following address for environmentally-friendly recycling
and disposal of your old SIMA TIC equipment:
Siemens Aktiengesellschaft
Anlagenbau und T echnische Dienstleistungen
A TD TD 3 Kreislaufwirtschaft
Postfach 32 40
D-91050 Erlangen
T elephone: ++ 49 91 31/7-3 36 98
T elefax: ++ 49 91 31/7-2 66 43
This Siemens service department provides a comprehensive and flexible dis -
posal system with customized advice at a fixed price. After disposal, you
receive a breakdown of the dismantling procedure with information on the
proportions of materials and the relevant material record documentation.
Recycling and Dis -
posal
Preface

vi S7-300,
Installation and Hardware
EW A 4NEB 710 6078-02a
Depending on the CPU, you require the following documentation for instal -
ling your S7-300:
Hardware and
Installation ,
Manual
Reference
Manual
Module
Specs.
Instruction
List
Documentation package
Order No. 6ES7
398-8AA02-0BA0
The following documentation is required for installing the S7-300 and for preparing it for
operation:
For CPUs 312 IFM and 314 IFM, you will also require the description of the inte -
grated functions and the control functions in STEP 7:
Integrated
Functions
Manual
System and Standard
Functions
Reference Manual
Order No. 6ES7 398-8CA00-8BA0 Order No. 6ES7 810-4CA02-4BR0
Appendix G contains a list of documentation, which you require for program -
ming and starting up the S7-300. In addition, you will find a list of specialist
books on programmable controls.
Furthermore, the complete SIMA TIC S7 documentation will be available on
CD-ROM.
T
o help you find special information quickly , the manual contains the follow -
ing access aids:
 At the start of the manual you will find a complete table of contents and a
list of the diagrams and tables that appear in the manual.
 An overview of the contents of each section is provided in the left column
on each page of each chapter .
Y ou will find a glossary in the appendix at the end of the manual. The
glossary contains definitions of the main technical terms used in the
manual.
 At the end of the manual you will find a comprehensive index which
gives you fast access to the information you need.
Scope of the Docu-
mentation Package
Documentation for
Programming
CD-ROM
How to use this
Manual
Preface

vii
S7-300, Installation and Hardware
EW A 4NEB 710 6078-02a
Please contact your local Siemens representative if you have any queries
about the products described in this manual. A list of Siemens representatives
worldwide is contained in the appendix to this manual.
If you have any questions or suggestions concerning this manual, please fill
in the form at the end of this manual and return it to the specified address.
Please feel free to enter your personal assessment of the manual in the form
provided.
W
e of fer a range of courses to help get you started with the SIMA TIC S7 pro -
grammable controller . Please contact your local training center or the central
training center in Nurember g, D-90327 Germany , T el. [phone].
Y ou can receive up-to-date information on SIMA TIC products from the fol -
lowing sources:
 On the Internet at http://www .ad.siemens.de/
V ia fax polling number [phone]
In addition, the SIMA TIC Customer Support provides up-to-date information
and download facilities for users of SIMA TIC products:
 On the Internet at http://www .ad.siemens.de/simatic–cs
V ia the SIMA TIC Customer Support mailbox under the following num -
ber: +49 - 91 1 - 895 - 7100
For dialing into the mailbox, use a modem of up to V .34 (28.8 Kbaud) and
set the following parameters: 8, N, 1, ANSI, or alternatively use ISDN
(x.75, 64 Kbit).
Y ou can reach the SIMA TIC Customer Support by telephone at
[phone] and by fax at [phone]. Queries can also be
addressed to us by Internet mail or by mail to the mailbox specified above.
Additional Assis -
tance
Up-to-date
Information
Preface

viii S7-300,
Installation and Hardware
EW A 4NEB 710 6078-02a
Preface

ix
S7-300, Installation and Hardware
EW A 4NEB 710 6078-02a
Contents
Preface
1 Product
Overview
2 Mechanical Configuration
2.1
Horizontal and V ertical Arrangement of an S7-300 2-2. . . . . . . . . . . . . . . . . . . .
2.2 Mounting Dimensions of the S7-300 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 The Module Arrangement for an S7-300 Configuration on One Rack 2-6. . . .
2.4 The Module Arrangement for an S7-300 Configuration on Several Racks
(not CPU 312 IFM/313) 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Addressing the S7-300 Modules
3.1
Slot-Oriented Addressing for Modules (Default Addressing) 3-2. . . . . . . . . . . .
3.2 User-Oriented Address Allocation with the CPU 315-2 DP 3-4. . . . . . . . . . . . .
3.3 Addressing Signal Modules 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Addressing the Integrated Inputs and Outputs of the CPUs 312 IFM and
314 IFM 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Electrical Configuration
4.1
General Rules and Guidelines for Operating an S7-300
Programmable Controller 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Current Consumption and Power Losses of an S7-300 4-4. . . . . . . . . . . . . . . .
4.3 Configuring the S7-300 Process Peripherals 4-8. . . . . . . . . . . . . . . . . . . . . . . . .
4.4 S7-300 Configuration with Grounded Reference Potential 4-12. . . . . . . . . . . . .
4.5 S7-300 Configuration with Ungrounded Reference Potential
(not CPU 312 IFM) 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 S7-300 Configuration with Isolated Modules 4-14. . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Configuration of an S7-300 with Non-Isolated Modules 4-16. . . . . . . . . . . . . . . .
4.8 Cabling Inside Buildings 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 Cabling Outside Buildings 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 Protecting Digital Output Modules Against Induced Overvoltage 4-21. . . . . . . .
4.11 Lightning Protection 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.1 Lightning Protection Zone Concept 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.2 Rules for the T ransition between Lightning Protection Zones 0  1 4-26. . . . .
4.11.3 Rules for T ransition between Lightning Protection Zones 1  2 and
Greater 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.4 Example Circuit for Surge Protection of Networked S7-300s 4-31. . . . . . . . . . .

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5 Installing an S7-300
5.1 Installing the Rail 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Module Accessories 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Installing the Modules on the Rail 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Identifying the Modules with Slot Numbers 5-9. . . . . . . . . . . . . . . . . . . . . . . . . .
6 Wiring an S7-300
6.1 Wiring Rules 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Wiring the Power Supply Module and CPU 6-3. . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Setting the Power Supply V oltage Selector Switch 6-5. . . . . . . . . . . . . . . . . . . .
6.4 Wiring the Front Connectors of the Signal Modules 6-6. . . . . . . . . . . . . . . . . . .
6.5 Connecting Shielded Cables Using the Shield Connecting Element 6-10. . . . .
7 Configuring an MPI or PROFIBUS Subnet
7.1 Configuring a Subnet 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.1 Basic Principles 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Considerations for CPs and FMs 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.2 Rules for Configuring a Subnet 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.3 Cable Lengths 7-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Network Components 7-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.1 PROFIBUS Bus Cable 7-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.2 Bus Connectors 7-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.3 Plugging the Bus Connector into a Module 7-22. . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.4 RS 485 Repeater 7-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Preparing an S7-300 for Operation and Start-up of PROFIBUS-DP
8.1 Plugging in the Memory Card (Not CPU 312 IFM/314 IFM) 8-2. . . . . . . . . . . .
8.2 Inserting the Backup Battery/Rechargeable Battery (Not CPU 312 IFM) 8-4.
8.3 Connecting a Programming Device 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.3.1 Connecting a Programming Device to an S7-300 8-7. . . . . . . . . . . . . . . . . . . . .
8.3.2 Connecting a Programming Device to Several Nodes 8-8. . . . . . . . . . . . . . . . .
8.3.3 Connecting a Programming Device to Ungrounded Nodes of an
MPI Subnet 8-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.4 Resetting the CPU Memory 8-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.5 PROFIBUS-DP Startup 8-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.5.1 Startup of the CPU 315-2 DP as a DP Master 8-15. . . . . . . . . . . . . . . . . . . . . . . .
8.5.2 Startup of the CPU 315-2 DP as a DP Slave 8-16. . . . . . . . . . . . . . . . . . . . . . . . .
9 Changing the Backup Battery/Rechargable Battery , Module and Fuses
9.1
Changing the Backup/Rechargeable Battery (not CPU 312 IFM) 9-2. . . . . . .
9.2 Replacing Modules 9-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.3 Replacing Fuses on 120/230 V AC Digital Output Modules 9-8. . . . . . . . . . . . .
Contents