EtherNet/IP - plccenter.cn · The EtherNet/IP Network Was Designed ... . 2 ... Information portion...

EtherNet/IPSystem Overview

The EtherNet/IP Network Was Designed to Meet Your NeedsEtherNet/IP, short for “Ethernet™ Industrial Protocol,” is anopen industrial networking standard that takes advantage of commercial, off-the-shelf Ethernet communication chips

and physical media. BecauseEthernet technology has beenused sincethe mid-seventiesand is widelyacceptedthroughout

the world, it stands that Ethernet deliv-ers the largest community of vendors inthe world. By using Ethernet technology, not only are you working with the common trend in technology today, but you also have the ability to accessdevice-level data from the Internet.

High demand for Ethernet-compatiblecontrol applications drove the designand creation of EtherNet/IP. This networking standard supports bothimplicit messaging (real-time I/O messaging) and explicitmessaging (message exchange). EtherNet/IP is an open network that uses existing commercial technology, including:• IEEE 802.3 Physical and Data Link standard• Ethernet TCP/IP protocol suite (Transmission Control

Protocol/Internet Protocol), the Ethernet industry standard• Control and Information Protocol (CIP), the protocol that

provides real-time I/O messaging and information/peer-to-peer messaging.

Where Did Ethernet Originate?The Xerox Palo Alto Research Center developed Ethernet inthe 1970s primarily for use as a Local Area Network (LAN)technology for office environments. In 1979, Digital

Equipment Corporation and Intel joined Xerox in partnershipto promote the new network, and in 1980 they published thefirst Ethernet specification. Ownership of the Ethernet specification was transferred to the Institute for Electricaland Electronic Engineers (IEEE), who approved and released it as IEEE Std 802.3 in 1983. In 1985, theInternational Standards Organization (ISO) released the

first international draft of the standardas ISO/IEC 8802-3, which establishedEthernet as a true international standard. Fast Ethernet and GigabitEthernet have enhanced the originalEthernet technology to includespeeds of 100 Mbps and 1 Gigabyte, respectively.

Rockwell Automation emerged as anindustry leader by shipping thousands

of Ethernetproducts during the standard’sevolution.We continueto build our

expertise by developing new ideas, ranging from completesolutions to networking applications.

Combining Ethernet Features with Rockwell Automation InnovationThrough its NetLinx Architecture, Rockwell Automationoffers you a choice of technologies and a broad scope ofproducts to fit your unique application. The NetLinx OpenNetwork Architecture combines network services with CIP (control and information protocol) and open softwareinterfaces to ensure the efficient flow of information andcontrol data throughout your organization. It is designed toinclude device, control, and information networks, and bring you a more efficient way to combine networks withoutsacrificing performance. You can mix and match one, two, orall three of the networks, based on your specific application.You can seamlessly move data among the networks withoutadditional programming, configuration, or creation of routing tables.

Introduction to EtherNet/IPRockwell Automation EtherNet/IP System Overview

❝The most sensible option was to choose a supplier whowould deliver an integratedsolution, incorporating control systems and drives. RockwellAutomation architectures havea good reputation in this field.❞

W.A Verhoef, ManagerElectrotechnical Instrumentation

and Information Systems

www.ethernetip.org

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NetLinx Open Architecture

Introduction to EtherNet/IPRockwell Automation EtherNet/IP System Overview

NetLinx Architecture is the foundation for three open networks: DeviceNet™, ControlNet™, and EtherNet/IP. Open

means that the specifications and technology do not lie within RockwellAutomation’s hands alone. The OpenDeviceNet Vendors Association™

(ODVA) and ControlNet International™

own the specifications and technology,and provide marketing, continued development, and administration. Within each of theorganizations, special interest groupsdetermine the direction of the technology for each network. The result is the availability of numerousdevices from multiple vendors, allboasting interoperability between oneanother. Open also means internationalacceptance. The technology and speci-fications behind each open networkhave become worldwide standards.

Our information-enabled architecture,including the Logix platforms, providesyou with unprecedented efficiency andperformance that is easily tailored to your specific application needs. NetLinx Architecture encompasses all of the components necessary to connect your manufacturing system to your business enterprise. A common communication protocol and open software/hardware interfaces connect plant-floor devices all the way to the Internet. Rockwell Automation’s communicationprotocol choice is the Control and Information Protocol (CIP).All three networks within the NetLinx Architecture use thisprotocol to communicate. The Control portion of CIP is usedfor real time I/O messaging, or implicit messaging. TheInformation portion of CIP is used for message exchangeand is also called explicit mes-saging. The two types ofmessages provide opti-mal benefits for

industrial control. The CIP protocol is a major componentwithin the NetLinx Open Network Architecture, and it provides you with four crucialfeatures. • Common control services - provides you with a standard set of services based on the producer/consumer model formoving real-time control data on

all threenetworks within the NetLinx Architecture• Common communication services -lets you connect to any network andconfigure and collect data from anynetwork. All support peer-to-peer and multi-master configurations.• Common routing capabilities - saves time and effort during systemconfiguration and provides for remotemonitoring and troubleshooting; norouting tables, added logic, or controllers are needed to move data between networks

• Common base knowledge - reduces the amount of training needed when switching to different networks within the NetLinx Architecture by providing similar configuration tools and features

With the NetLinx Open Network Architecture You Can:• Control: provide real-time data exchange in a variety of methods. For example, selectable I/O refresh rates including change-of-state, cyclic, and scheduled updates, single producer or multi-producer systems, shared inputs, peer-to-peer messaging, and interlocking between controllers.

❝We’ve been able to do away with all these complex controls. With producer/consumer, we just throw in a message and it runs...In effect, we’ll have tripleredundancy!❞

Dave GallieAutomation & Network Engineer

Kiwi Dairies

• Configure: supply the ability to configure all networkdevices from one central location. You can configuredevices upon start-up, modify device parameters with a click of a mouse or through controller logic, and have noimpact on control performance. You no longer have to movefrom network to network for configuration purposes. Now,you can set up your entire system from one location, with one connection.

• Collect: provide a perfect solution forHMI display, trending and analysis, recipemanagement, or for maintenance andtroubleshooting. This can be done at regular intervals or on demand withoutthe need for controllers to regulate network traffic with additional programming.

The NetLinx Open Network Architecture isefficient because of its producer/consumer networking model and standard hardware andsoftware interfaces. On producer/consumer networks, if a node needs the packet, it will consume the packet. Thesource sends that packet once and all the nodes consumethat same packet if they need it. This breakthrough brings you: • increased efficiency because data is produced once,

regardless of the number of consumers • synchronization because data arrives at each

node at the same time

Producer/consumer is also better because:• nodes can be easily synchronized

for more precise system performance

• devices can communicate autonomously, peer-to-peer –no need for a system master, controller, or extra controller memory for networkmanagement

Complete EtherNet/IP SolutionEthernet Industrial Protocol (EtherNet/IP) is an open industrial networking standard that supports both implicitand explicit messaging, and uses commercial off-the-shelfEthernet communication chips and physical media.

EtherNet/IP is an open network using:• IEEE 802.3 Physical and Data Link standard

• Ethernet TCP/IP protocol suite (Transmission Control Protocol/Internet Protocol)

• Control and Information Protocol (CIP)

TCP/IP is the transport and network layerprotocol of the Internet and is commonlylinked with Ethernet installations and thebusiness world. TCP/IP provides a set ofservices that any two devices can use toshare data. Because Ethernet technology

and standard protocol suites such as TCP/IP have been published for public use, standardized software tools andphysical media have been mass-produced and are readilyavailable, offering you the benefits of known technology and accessibility.

The UDP/IP (User Datagram Protocol) is also used in conjunction with the Ethernetnetwork. UDP/IP provides thefast, efficient data transport necessary for real-time dataexchange.

To make EtherNet/IP successful,CIP has been added on top ofTCP/UDP/IP to provide a common application layer. Therefore, when you choose anEtherNet/IP product, you are choosing a product with TCP/IP and CIP capabilities. EtherNet/IP uses the producer/

consumer network model, as doDeviceNet and ControlNet networks, which also use CIP.

Complete EtherNet/IP SolutionsRockwell Automation EtherNet/IP System Overview

Complete EtherNet/IP SolutionsRockwell Automation EtherNet/IP System Overview

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With the introduction of Ethernet switch technology and full-duplex data transmission, the occurrence of data collisions is effectively eliminated and performance is drastically enhanced on your EtherNet/IP network.

Typically, an EtherNet/IP network uses an active star topology in which groups of devices are connected point-to-point to a switch.The benefit of a star topology is inits support of both 10 and 100Mbps products. You can mix 10 and 100 Mbps devices, and the Ethernet switch willnegotiate the speed. Also, thestar topology offers you connectionsthat are simple to wire, easy to debug or findfailures, and easy to maintain.

EtherNet/IP is designed to handle large amounts of messaging data – up to 1500 bytes per packet. It provides the management of large amounts of data in a predictablemanner. In addition to data handling, EtherNet/IP’s speed,10/100 Mbps, makes that data transmission even more appealing. Because of thewide acceptance of Ethernettechnology throughout the years,the cost per node for Ethernetdevices is rapidly decreasing.With these characteristics,EtherNet/IP is becoming a viable choice for many control applications.

EtherNet/IP provides cost savings by offering a wide selection of vendors and products, and by training personnel. Ethernet technology is well known, and by many applications, personnel do not need additional training.

ODVA and ControlNet International introducedEtherNet/IP to the market and hundreds

of companies have embraced thetechnology. Development tools areavailable on the web at no cost and developers are

already announcing products. Allen-Bradley Ethernet controllers,

PLC-5™, SLC™, and ControlLogix have had the EtherNet/IP protocol included since 1998,

providing the information services. Control services arebeing added to the ControlLogix™, ProcessLogix™, 1756 I/O,FLEX™ I/O, Powermonitor, and PanelView™ products.

Rockwell Automation’s unique Complete Automation strategyof helping customers achieve a competitive advantage issupported by thousands of authorized partners, distributors,and system integrators around the world. CompleteAutomation is our commitment to understand your technicaland commercial needs, and to respond to these needs bybringing together the best the industry has to offer.

EtherNet/IP Hardware for ControlLogix and ProcessLogixThe ControlLogix system offers a superiorapproach to multiple types of control. You canperform sequential, process, drive or motioncontrol, in any combination. Engineering productivity is increased through such tools as advanced diagnostics and symbolic programming. Your investment in ControlLogix is assured with such features as flash-upgradable firmware.

ProcessLogix is a hybrid DCS system that offersa scaleable, open control system for batch and process applications. With ControlLogix itprovides an integrated, cost-effective plantwidecontrol system. It shares the same hardware, I/O and network connectivity as ControlLogix for maximum control functionality at a minimuminvestment.

ControlLogix and ProcessLogix connect toEtherNet/IP via the EtherNet/IP Bridge Module.This creates a bridge for EtherNet/IP links that lets you route messages to devices on other networks, such as ControlNet, DeviceNet,Remote I/O, and Data Highway Plus. This isaccomplished by plugging multiple communica-tion interface modules into the ControlLogix orProcessLogix backplane, resulting in a bridge toroute control and information data between networks. General communication messagescan be sent from or received by ControlLogix orProcessLogix processors across multipleEtherNet/IP networks as well.

RSLinx™ Software provides you with the ability to look up general module, diagnostic andstatus, and configuration information for the ControlLogix or ProcessLogix modules on your networks.

Logix EtherNet/IP HardwareRockwell Automation EtherNet/IP System Overview

ControlLogix/ProcessLogix10/100 Mbps Hardware• EtherNet/IP Bridge Module• EtherNet/IP Communication Interface Module• RSLinx Software• EtherNet/IP Interface Transceiver Cable

EtherNet/IP 10/100 MbpsModule• bottom RS-45 or fiber

optic media connector• communication rate of

10/100 Mbps• uses the open EtherNet/IP

Protocol• supports other Ethernet

protocols: HTTP, SNMP, etc.• supports routing

communication to and from other modules in the same chassis

• no limit on number of modules in chassis

• control, configuration and collection of data with EtherNet/IP

• remove and insert under power

• embedded web server functionality

• front panel module/system diagnostics

Logix EtherNet/IP HardwareRockwell Automation EtherNet/IP System Overview

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features and unique characteristics

EtherNet/IP 10 Mbps Module• 10-baseT and AUI port• communication rate

of 10 Mbps• uses the open EtherNet/IP

Protocol• supports other Ethernet

protocols: HTTP, SNMP, etc.• supports routing

communication to and from other modules in the same chassis

• no limit on number of modules in chassis

• control, configuration and collection of data with EtherNet/IP

• remove and insert under power


ControlLogix EtherNet/IP Hardware

The ControlLogix architecture delivers alower total cost of ownership because it can be used to control multiple types of applications within a facility.

PLC™ and SLC™ ControllersEtherNet/IP PLC-5 controllers integrate the Allen-Bradley architecture into an industry-standard TCP/IP Ethernet system, offering a flexible and open solution. With the controller’sbuilt-in communication capabilities, your application can use standard Ethernet connectivity to control and monitor production.All controllers support data transfer using theOpen EtherNet/IP protocol.

The PLC-5 EtherNet/IP Interface Module is a single-slot module that attaches to the side ofany Enhanced PLC-5 controller, EtherNet/IP PLC-5 controller, or ControlNet PLC-5 controller. This provides additional EtherNet/IP connectivity.

SLC 500 family controllers target smaller applications, but offer powerful and flexibleoptions. The SLC 5/05 EtherNet/IP controllers feature the same open standard EtherNet/IPtechnology based on the TCP/IP protocol. The built-in Ethernet communication port provides faster throughput due to no backplanedelays. The 10-baseT Ethernet connection provides an economical means of connecting to the EtherNet/IP network. Communication ratesare quick and provide high performance networking for program upload/download, on-line editing, and peer-to-peer messaging.

PLC and SLC Controllers Rockwell Automation EtherNet/IP System Overview

PLC and SLC Controllers• EtherNet/IP PLC-5/20 Controller• EtherNet/IP PLC-5/40 Controller• EtherNet/IP PLC-5/80 Controller• PLC-5 EtherNet/IP Interface Module• SLC 5/05 EtherNet/IP Controllers

PLC-5 ProgrammableControllers• high-bandwidth

computer and controller communications

• open EtherNet/IPstandard protocol

• standard Simple NetworkManagement Protocol(SNMP)

• 10 Mbps• AUI port• embedded web server• processor input interrupts• selectable timed interrupts• programmable fault

response

PLC and SLC ControllersRockwell Automation EtherNet/IP System Overview

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SLC 500 Family Controllers• high-bandwidth

computer and controller communications

• open EtherNet/IPstandard protocol

• standard Simple NetworkManagement Protocol(SNMP)

• 10 Mbps• RJ-45 media connector

for twisted pair• discrete input interrupts• selectable timed interrupts• programmable fault

response• 3 memory versions

PLC and SLC Controllers

The PLC-5/SLC-500 family of controllersdelivers confidence by providing the most reliable technologies and a large worldwide install base.

FLEX I/OFLEX I/O is a modular I/O system for distributedI/O applications. It is a general purpose I/O system that provides end users with field device connection flexibility, total life cycle costsavings and multiple network communicationchoices for distributed I/O applications. Thedesign of FLEX I/O and its components providesall the functionality of larger, rack-based I/O, but saves you the costly hardware, installation,and space requirements of larger systems.

1756 I/OThe 1756 I/O platform tightly integrates I/O with both programming software andcontroller to achieve savings of time and moneyat commissioning and during normal operation.During commissioning, 1756 I/O lets you be more productive with easy configuration andsetup of I/O modules, an analog I/O module wizard and a discrete I/O wizard.

During normal operation, 1756 I/O modules offer standard and specialty modules for faultdetection, monitor and fault data, time-stampingof data, and change-of-state and cyclic dataproduction.

I/O SystemsRockwell Automation EtherNet/IP System Overview

I/O Systems• EtherNet/IP FLEX I/O Adapters• 1756 I/O Modules

EtherNet/IP FLEX I/O Adapter• RJ-45 media connector for

10/100 Mbps twisted pair• MT-RJ fiber optic media

connector for 100 Mbpsfiber

• 10/100 Mbps auto negotiation

• supports I/O control and data transfer using the openEtherNet/IP protocol


• up to eight FLEX I/O modulesmay be connected to a single Ethernet adapter

• interfaces up to 128 discreteI/O points or 64 analog channels per adapter to the Ethernet network

I/O SystemsRockwell Automation EtherNet/IP System Overview

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1756 I/O Modules• digital, analog and specialty

modules• isolated and non-isolated

choices• field-side diagnostic I/O

modules• high speed counting and

programmable limit switch specialty modules

• wire termination options that include spring and screw types as well as pre-wired remote termination

• 10/100 Mbps remote rack connection via the EtherNet/IP Module

I/O Systems

ControlLogix I/O reducesinstallation costs by providingdiagnostic screens that giveyou the information you needto fine tune the system.

Operator InterfacesRockwell Automation offers a complete range of dedicated operator interfaces. PanelViewStandard EtherNet/IP operator terminals are engineered for maximum performance in spacesaving flat panel and CRT designs. They featurebrilliant graphics capabilities in color, grayscale,and monochrome displays, with screen sizesranging from 5” to 14”. They offer high perform-ance interface functionality including advancedalarm handling, screen security, analog gauges,ATA PC memory card, local language support, andonline printing for more intuitive operator control.

PanelView EtherNet/IP terminals can communicate to multiple PLC-5E, SLC 5/05, and ControlLogix processors, as well as otherEtherNet/IP devices using CIP protocol. They willsupport an IP or DNS device address and useAssembly Object instances to communicate withEtherNet/IP devices. Up to eight consumer andeight producer instances will be supported.

PanelBuilder32 software supports the entire family of PanelView Standard terminals, allowing easy conversion and reuse of existingapplications. Designed to operate on theMicrosoft Windows (including Windows 2000)operating system, PanelBuilder32 features anintuitive development environment to simplifyapplication design, reduce development time,maximize performance, and improve productivity.

Operator InterfaceRockwell Automation EtherNet/IP System Overview

Operator Interface• PanelView 550 and 550 Touch Only• PanelView 600 and 600 Touch Only• PanelView 900• PanelView 1000• PanelView 1400• Rockwell Industrial Workstations

PanelView StandardTerminals• uses open EtherNet/IP

protocol• RJ-45 media connector

for 10/100 Mbps twistedpair

• 10/100 auto negotiation• keypad, touch only or

combination touch screen and keypad

• pixel graphic display in color, grayscale or mono-chrome

• extensive alarm capabilitiesto record and display

important data on triggeredalarms

• screen security offers controlled operator accessto application screens

• ATA PC flash memory card for fast application downloads

Operator InterfaceRockwell Automation EtherNet/IP System Overview


PanelBuilder32 Software• one package for all

PanelView Standard terminals for easy screenconfiguration

• upload/download application files over thenetwork, includes Ethernet

• full complement of operatordevices including push buttons, selectors, numericand ASCII entry devices,diagnostic indicators, messages displays, embedded numeric and ASCII variable displays, custom graphics and more

• cut, copy, paste and tag import/export capabilities

Operator Interface

PanelView Standard graphicterminals offer advancedoperator interface solutions,with multiple operator inputcapabilities, brilliant mono-chrome or color displays, andhigh performance functions.

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EtherNet/IP Communication ModuleThe new 1761-NET-ENI provides EtherNET/IPconnectivity for all MicroLogix controllers andother DF1 full duplex devices. The ENI lets youeasily connect MicroLogix onto new or existingEtherNet/IP networks and upload/download programs, communicate between controllers,and generate Email messages via SMTP (simple mail transport protocol).

As with other MicroLogix communicationdevices, the ENI can be powered via the RS-232 communication cable when attached to a MicroLogix controller, or externally with 24V dc when connected to other DF1 full duplexdevices. It can be DIN-rail mounted, or panelmounted to meet virtually any installationrequirement.

EtherNet/IP Communication ModuleRockwell Automation EtherNet/IP System Overview

EtherNet/IP Communication Module• 1761-NET-ENI Module

EtherNet/IP Interface Module• program upload/download• peer-to-peer to messaging• email messaging• EtherNet/IP compatibility• easy to configure• 10-baseT port• isolated mini din

RS-232 port• 10 Mbps network speed

EtherNet/IP Communication ModuleRockwell Automation EtherNet/IP System Overview

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EtherNet/IP Communication Module

EtherNet/IP communicationmodule offers fast and easy DF1 to EtherNet/IP connectivity.

Monitoring Power Quality and UsageEthernet is an ideal network for monitoring theelectrical parameters in your facility or acrossyour entire corporation. The extensive array ofelectrical data available from the Bulletin 1404Powermonitor 3000 is quickly transferred across EtherNet/IP to a variety of applications. It provides information to everyone in the plant from maintenance to accounting with information to assist with cost allocation,demand management, or production scheduling.

The Powermonitor 3000 has two versions, the M4 and the M6. The M4 unit provides basic metering including frequency, voltage, current, and power. It also provides calculatedinformation such as energy consumption, powerfactor, and total harmonic distortion. The unit is certified revenue accurate according to the ANSI C12.16 standard. The unit also hasonboard logging capability that can store data,record the min and max of each parameter, andkeep an event log. The M6 unit contains all ofthis functionality plus additional data includingextensive waveform capture and storage andspectral analysis up to the 41st harmonic.

The Powermonitor 3000 with EtherNet/IP communications can send data to PLCs, SLCs, or ControlLogix. It has a built-in web page sothat you can view the real-time data over theEtherNet/IP network using only web browser software. The unit can be used by itself or in a larger energy management system using software such as RSPower32 or RSEnergy.These software packages let you create a system that will monitor, log, and alarm theelectrical information in your facility. The Power& Energy Management Solutions Team (PEMS)can supply individual components or turnkey,engineering solutions to meet your exact needs.

Power & Energy Management SolutionsRockwell Automation EtherNet/IP System Overview

Power & Energy Management Solutions• Bulletin 1404 Powermonitor 3000• RSPower32™ Software• RSEnergy™ Software• Turnkey Energy Management Systems

Power and EnergyManagement• power quality monitoring• energy consumption logging

and analysis tools• embedded web server

for minimal software requirements

• non-brominated FDA approved plastics in display module for pharmaceutical, food processing, and controlroom fire safety applications

• connectivity to existing facility Ethernet network andother Rockwell Automation control equipment

• extensive non-volatile memory logs

Power & Energy Management SolutionsRockwell Automation EtherNet/IP System Overview

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• event recording including power up, power down, waveform captures, andset-point triggers with time stamp

• 10-baseT connector with RJ-45 plug

• 2 inputs with counters for breaker or relay status

• 2 outputs – 1 configurable KYZ output for generating energy pulses, 1 ANSI C37.90 output for tripping or closing circuit breakers

• experienced PEMS engineers to help you design and implement a customized system

Power & Energy Management Solutions

Powermonitor 3000 displaymodule can replace two ormore analog meters, providingyou with a single display toview all electrical parameters.

Physical MediaEtherNet/IP’s cabling components provide flexibility in two ways: overall cost and manufacturer. Due to multiple third-party vendors, you now have a wide selection ofmedia components and cost considerations.When building your network, you may use manyof the following components: cabling, trans-ceivers, hubs, repeaters, bridges, and switches.

Coaxial, twisted pair, and fiber optic cable are all fully functional with EtherNet/IP–the onlydecision you need to make is cost. RockwellAutomation offers a Media Access Unit that aidsin the transmission and reception of signals. Itcontinually monitors media during transmissionfor collisions and listens for a quiet period inwhich to transmit signals. Repeaters extend your overall network cable length. They can also connect networks with varying media types.

When designing your EtherNet/IP system, Rockwell Automation had developed severaltools to help you select the elements you need,including switches, hubs, bridges, and cables. The EtherNet/IP Performance & ApplicationGuide includes an overview of using Ethernet for control and describes EtherNet/IP. It alsoprovides tools for predicting performance. In addition, the EtherNet/IP Media Planning andInstallation Guide will help you determine thephysical requirements and best practices forinstallation.

Physical Media Rockwell Automation EtherNet/IP System Overview

Physical Media• 10-baseT/100-baseT cable• EtherNet/IP Transceiver• Allen-Bradley Media Checker

Physical Media• 10-baseT/100-baseT cable• 10-base2 cable• 10-base5 cable• fiber optic cable

Allen-Bradley Media Checker• test physical media for

opens and shorts• displays distance to

opens and shorts• identifies improperly wired

connectors at connectorend

Physical MediaRockwell Automation EtherNet/IP System Overview

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• measures overall network cable length

• measures networktermination value(resistance)

• comes with carryingcase and batteries

• supports 10-baseT connector

Physical Media

The Media Checker helps save time and moneybecause it performs a variety of physical layer tests,analysis and measurements that identify and helpeliminate those problems with speed and ease.

Food and BeverageEtherNet/IP Provides Easy and Reliable Solutions

Food and BeverageApplication History

Cadbury’s Crunchie™ is one of the top selling chocolate bars in the UnitedKingdom. While the plant used for producing the Crunchie bar is modern, the existing DCS control system, installed in 1981, was becoming a problem. Over 1 million bars can be produced each day at a rate of 1200 bars per minute.The honeycombed center is mixed to produce high temperature foam. The foam is then fed onto a moving conveyor where it is monitored to maintain a constant thickness.

EtherNet/IP provided the backbone for all communication between PLCs and PCs running Rockwell Software’s RSView package. RSView allowed for monitoring and controlling automated machines and processes. With its richgraphics and enhanced tools, an accurate representation of the large complexCrunchie line could be sent to operators in a remote control room.

PLC-5 Family ControllersRSView Software

❝Rockwell Automation is able to supply a wide range of industrial control products as well as softwaresystems and this total package made aconsiderable contribution to the success of this project.❞

David WilliamsSystems Engineer, Cadbury

Food and BeverageEtherNet/IP Delivers Determinism

When South African Breweries Limited (SAB), one of the world’s fivelargest breweries, needed a way to communicate real-time changes inproduction to both the shop floor and management, it asked RockwellAutomation to provide a solution. Allen-Bradley equipment in the form of PLC-5s and a DH+ network already existed in the plant. So RockwellAutomation had to find a way to incorporate the existing equipment, combine the various plant networks, and make sure plant data was accessible at any level.

Engineers installed a ControlLogix Gateway that connects the DH+ networks to the Ethernet plant-wide network and onto the Packagingserver. The EtherNet/IP module connects to management offices, and in the future, to the company’s Intranet. RSLinx presents the data contained in the two PLC-5s to the RSSQL software via DDE. TheEtherNet/IP connection also allows for planning personnel to enter production line target values.

ControlLogix Gateway ModuleEtherNet/IP Communication Interface ModulePLC-5 Family ControllersRSLinx Software

❝The line manager and the packagingmanager can go into the new systemform the PCs at their desks and see what is happening now. And we havethe option of putting information on the “Beernet” (SAB’s term for their Intranet).❞

RepresentativeSouth African Breweries Limited (SAB)

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Food and BeverageApplication History

Exploring the possibilities of EtherNet/IP does not stop withthis publication. More information is available to youthrough the following:

Seminars Rockwell Automation has designed seminars with hands-onlabs that can introduce you to the various EtherNet/IP products and solutions that may fit your needs. If you areinterested, contact the nearestRockwell Automation office for a schedule.

World Wide Web EtherNet/IP, as well as othernetwork information, can be located atwww.ab.com/networks. This website contains detailsabout EtherNet/IP products as well as other productsoffered by Rockwell Automation.

Contact InformationRockwell Automation engineers design products, configuresolutions, and deliver services that maximize the reliabilityand maintainability of your processes. Contact your localRockwell Automation sales office for more information anda demonstration.

Copyright 2000 Rockwell International CorporationAll trademarks and registered trademarks are property of their respectivecompanies. Ethernet is a trademark of Digital Equipment Corporation.ControlNet is a trademark of ControlNet International. DeviceNet is a trademark of Open DeviceNet Vendors Association. Windows, Microsoft,

and Windows NT are trademarks of MicrosoftCorporation. PLC, PLC-5, FLEX, ControlLogix,PanelView, PanelBuilder, Powermonitor, ProcessLogix, PanelBuilder32, RSPower32,RSEnergy, PanelView 550, PanelView 900, DH+,Data Highway PLUS, RSLinx, SLC and RSView

are trademarksof RockwellAutomation.

www.ab.com/networks

Next StepRockwell Automation Your Future

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