SIMATIC
OPEN MODBUS / TCP
Communication via CP343-1 and CP443-1
Manual
SIMATIC S7
OPEN MODBUS / TCP
Communication via
CP343-1 and 443-1
Manual
Edition 3.0
Preface, Table of Contents
Product Description
1
Mounting
2
Commissioning
3
Function Block MODBUS
4
Transmission Protocol
5
Diagnostics
6
Application Sample
7
Appendices
Literature
Glossary
Safety Precautions and
Warnings
This manual contains warnings, which you should note for your own safety as well as for
the prevention of damage to property. These warnings are indicated by means of a triangle
and displayed as follows in accordance with the level of danger:
__________________________________________________________________
Danger
indicates that loss of life, severe personal injury or substantial damage
will result if proper precautions are not taken.
__________________________________________________________________
__________________________________________________________________
Warning
indicates that loss of life, severe personal injury or substantial 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.
__________________________________________________________________
__________________________________________________________________
Notes
call attention to information that is especially significant to the product, handling of the
product or a specific part of this documentation.
__________________________________________________________________
Qualified
Personnel
The equipment may be commissioned and put into operation by qualified personnel only.
For the purpose of safety relevant warnings of this manual a qualified person is one who is
authorized to commission, ground and tag devices, systems and circuits.
Use as prescribed
Trademarks
Please note the following:
_________________________________________________________________________
Warning
This equipment must only be used in applications as prescribed in the catalogue and the
technical description and in conjunction with equipment and components recommended and
authorized by Siemens.
Successful and safe operation of this equipment is dependent upon proper transport, and
storage, erection and installation as well as careful operation and maintenance.
SIMATIC
®
and SIMATIC NET
®
are registered trademarks of SIEMENS AG.
The other brand names in this manual may be trademarks use of which by third parties for
their purposes may infringe the proprietors’ rights.
Copyright © Siemens AG 2004 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
Industrial Solution and Services
IT4Industry
P.O. Box 3240, D- 91050 Erlangen
IT4Industry@siemens.com
Exclusion from Liability
We have checked the contents of this document with regard to
conformity to the described hardware and software. Deviations,
however, cannot be excluded; therefore we cannot accept prejudice for
its complete conformity. The information in this document is checked
regularly and necessary corrections are contained in subsequent issues.
Any suggestions for improvement are gratefully received.
© Siemens AG 2004
We reserve the right to make technical changes.
Preface
OPEN MODBUS / TCP communication via CP343-1 and 443-1
2XV9450-1MB00; Manual edition 3.0
1
Preface
Purpose of the
Manual
The information in this manual allows you to set up and put in operation the
connection between the CP 343-1/CP 443-1 and a device that supports the
Open MODBUS/TCP protocol.
Contents of the
Manual
This manual describes the function of the function block MODBUS and the
integration into the hardware and software of the communications processor
CP 343-1/CP 443-1.
The manual contains the following topics:
• Production description / Mounting
• Commissioning / Installation / Parameterization
• Function block
• Transmission protocol
• Diagnostics
• Application sample
Scope of this
Manual
This manual is valid for the following software:
Product Identification number From version
FB OPEN MODBUS / TCP 2XV9 450-1MB00 3.0
Function Block FB100 2.2
Function Block FB101 1.0
Note
This manual contains the FB description, as it is valid at the time of
publication
How to Access the
Information in this
Manual
To enable you a quick access to selected information, the manual provides
the following access aids:
• The next pages contain a complete table of contents.
Table of contents
OPEN MODBUS / TCP communication via CP343-1 and 443-1
2XV9450-1MB00; Manual edition 3.0
i
Additi
onal
Sources of
Information
All additional information concerning CP 343/CP 443 (mounting,
commissioning etc.) can be found in the manual
SIEMENS
SIMATIC NET
S7-CPs for Industrial Ethernet
device manual C79000-G8900-C155
SIEMENS
SIMATIC NET
S7-CPs for Industrial Ethernet
device manual part B1
CP 343-1 / CP 343-1EX20
C79000-G8900-C158
SIEMENS
SIMATIC NET
S7-CPs for Industrial Ethernet
device manual part B4
CP 443-1
C79000-G8900-C152
SIEMENS
SIMATIC NET
NCM S7 for Industrial Ethernet
manual C79000-G8900-C129
Additional information concerning STEP7 can be found in the following
manuals:
SIEMENS
SIMATIC Software
Base software for S7 and M7
STEP7 user manual
C79000-G7000-C502-..
SIEMENS
SIMATIC Software
System software for S7-300/400
System and standard functions
Reference manual C79000-G7000-C503-02
Additional
Questions
If you have further questions regarding the use of the FBs described in this
manual, which are not answered in this document, please contact your
Siemens partner who supplied you with this function block.
Terminology
This document uses the term CP or CP 343/CP 443. The descriptions only
apply to communications processor CP 343-1/CP 443-1.
Scope of
Application
The function block described in this manual establishes a connection
between the CP 343-1/CP 443-1 and third party MODBUS devices.
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