Allen-Bradley ControlLogix 1756-ENET/B User manual

ControlLogix
Ethernet
Communication
Interface Module
1756-ENET/B
User Manual
AB PLCs

Important User Information
Because of the variety of uses for the products described in this
publication, those responsible for the application and use of this
control equipment must satisfy themselves that all necessary steps
have been taken to assure that each application and use meets all
performance and safety requirements, including any applicable laws,
regulations, codes and standards.
The illustrations, charts, sample programs and layout examples shown
in this guide are intended solely for purposes of example. Since there
are many variables and requirements associated with any particular
installation, Allen-Bradley does not assume responsibility or liability
(to include intellectual property liability) for actual use based upon
the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Allen-Bradley office), describes some
important differences between solid-state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole
or part, without written permission of Rockwell Automation, is
prohibited.

Throughout this manual we use these notes to make you aware of
safety considerations:
Warning and Attention statements help you to:
•identify a hazard
•avoid a hazard
•recognize the consequences
Allen-Bradley and ControlLogix are trademarks of Rockwell Automation.
Ethernet is a trademark of Digital Equipment Corporation, Intel, and Xerox Corporation.
RSLinx and RSLogix 5000 are trademarks of Rockwell Software.
Windows 95/98 and Windows NT are trademarks of Microsoft Corporation.
WARNING
!
Identifies information about practices or
circumstances that have the potential to create an
explosion hazard.
ATTENTION
!
Identifies information about practices or
circumstances that can lead to personal injury or
death, property damage or economic loss.
IMPORTANT Identifies information that is critical for successful
application and understanding of the product.
AB PLCs

European Communities (EC)
Directive Compliance
If this product has the CE mark it is approved for installation within
the European Union and EEA regions. It has been designed and tested
to meet the following directives.
EMC Directive
This product is tested to meet the Council Directive 89/336/EC
Electromagnetic Compatibility (EMC) by applying the following
standards, in whole or in part, documented in a technical construction
file:
•EN 50081-2 EMC — Generic Emission Standard, Part 2 —
Industrial Environment
•EN 50082-2 EMC — Generic Immunity Standard, Part 2 —
Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low
Voltage, by applying the safety requirements of EN 61131-2
Programmable Controllers, Part 2 - Equipment Requirements and
Tests. For specific information required by EN 61131-2, see the
appropriate sections in this publication, as well as the Allen-Bradley
publication Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1.
Open style devices must be provided with environmental and safety
protection by proper mounting in enclosures designed for specific
application conditions. See NEMA Standards publication 250 and IEC
publication 529, as applicable, for explanations of the degrees of
protection provided by different types of enclosure.

Rockwell Automation
Support
Rockwell Automation offers support services worldwide, with over 75
sales/support offices, 512 authorized distributors and 260 authorized
systems integrators located throughout the United States alone, as well
as Rockwell Automation representatives in every major country in the
world.
Local Product Support
Contact your local Rockwell Automation representative for:
•sales and order support
•product technical training
•warranty support
•support service agreements
Technical Product Assistance
If you need to contact Rockwell Automation for technical assistance,
call your local Rockwell Automation representative, or call Rockwell
directly at: 1 440 646-6800.
For presales support, call 1 440 646-3NET.
You can also obtain technical assistance online from the following
Rockwell Automation WEB sites:
•www.ab.com/mem/technotes/kbhome.html (knowledge base)
•www.ab.com/networks/eds (electronic data sheets)
Your Questions or Comments on this Manual
If you find a problem with this manual, please notify us of it on the
enclosed Publication Problem Report.
AB PLCs

1Publication 1756-UM051B-EN-P - November 2000
Preface
About This User Manual
What this Preface Contains
This preface describes how to use this manual. The following table
describes what this preface contains and where to find specific
information.
Who Should Use
This Manual
This manual is intended for control engineers and technicians who are
installing, programming, and maintaining a control system that
communicates on an Ethernet network through a 1756-ENET/B
module.
We assume you have a good understanding of Ethernet and the
(TCP/IP) protocol. This user manual contains a brief description of
Ethernet and TCP/IP in Chapter 3. For detailed information on TCP/IP
protocol and networking in general, see the following publications:
•Comer, Douglas E. Internetworking with TCP-IP, Volume 1:
Protocols and Architecture, 2nd ed. Englewood Cliffs, N.J.:
Prentice-Hall, 1995. ISBN 0-13-216987-8.
•Tanenbaum, Andrew S. Computer Networks, 2nd ed.
Englewood Cliffs, N.J.: Prentice-Hall, 1989. ISBN 0-13-162959-X.
For information about See page
Who Should Use This Manual P-1
Common Techniques Used in This Manual P-2
How To Use This Manual P-2
About the Example Applications P-3
System Components P-4
Where to Find More Information P-5
Terminology P-6
AB PLCs

Publication 1756-UM051B-EN-P - November 2000
P-2 About This User Manual
Common Techniques
Used in This Manual
The following conventions are used throughout this manual:
•Bulleted lists provide information, not procedural steps.
•Numbered lists provide sequential steps.
•Information in bold contained within text identifies menu
windows, or screen options, screen names and areas of the
screen, such as dialog boxes, status bars, radio buttons and
parameters.
How To Use This Manual
This manual provides an overview of the 1756-ENET/B module, as
well as general information about Ethernet. It describes how to install
and configure the module, and provides three example applications
showing how to use the module to communicate over Ethernet.
The example applications are intended as building blocks to help you
get your own network up and running. We recommend that you set
up and run the example applications and use them as a guide for
setting up your own system.
TIP This symbol identifies helpful tips.
A definition box defines terms that may be
unfamiliar to you.
Screen captures are pictures of the software’s
actual screens. The names of screen buttons and
fields are often in bold in the text of a
procedure. Pictures of keys represent the actual
keys you press.
This is a definition
box. When a word is
bold within the text
of a paragraph, a
definition box will
appear in the left
margin to further
define the text.

Publication 1756-UM051B-EN-P - November 2000
About This User Manual P-3
About the Example Applications
The example applications presented in this manual are as follows:
•Rack Optimized I/O (chapter 5)
•Using Analog I/O with Direct Connection (chapter 6)
•Produced and Consumed tags (chapter 7)
Here’s an example of the type of system you’ll be creating for I/O
applications:
Logix5550 1756-ENET/B 1756-ENET/B
Data
Slot 0 1 Slot 0 1 2 3
1756-IB16I
Digital Input
1756-OB16I
Digital Output
Controller
Switch
Programming
130.130.130.1
130.130.130.2 130.130.130.3
Terminal
Local
Chassis
Remote
Chassis
1756-OF8
Analog Output
AB PLCs

Publication 1756-UM051B-EN-P - November 2000
P-4 About This User Manual
System Components
We used the following components for the example applications:
Quantity Product Name Catalog Number
Hardware
2 ControlLogix chassis 1756-A4, (or -A7, -A13, -A13, -A17)
2 ControlLogix power supply 1756-PA72, (or -PB72)
2 Ethernet Communications Interface Module 1756-ENET/B
2 Logix5550 controller 1756-L1
1 Analog Output Module 1756-OF8
1 Digital Input Module 1756-IB16I
1 Digital Output Module 1756-0B16I
1 Personal computer that supports RSLogix
5000 software
Any appropriate model running
Windows NT 4.0, Service Pack 5 or
higher
1 Ethernet switch Refer to manufacturer’s
specifications
Associated media and connectors as needed
Software
1 RSLinx 9355-WAB, -WABOEM, -WABC
1 RSLogix 5000 programming software 9324-RLD300ENE