i_pn03-103+fte

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FFaauulltt TToolleer r aanntt EEtthheer r nneett ((FFTTEE)) PPNN0033--110033

September, 2002

Outstanding features and benefits for robust networking!

• 4 communication paths between FTEnodes

• Tolerates a variety of multiple failures incables and electronics

• Rapid (~1 sec) detection and recovery

• Transparent to PC applications

• Allows normal (non-FTE) Ethernet nodes

• Online addition/removal of nodes

• COTS network hardware

• Minimal overhead—no duplicatemessages

• Fully distributed—no “master” node

• Easy configuration

• Fast 100 Mbps performance

• STP or fiber cable for noise protection

• CE-Mark compliant

• Full suite of services available for networkengineering, installation, andmanagement

• Available with the Honeywell family of

automation systems-- Experion PKS™, PlantScape

© , and TPS.

Honeywell systems with FTE:Industrial network robustness at all levels

The evolution of open Ethernet technology hasintroduced high-performance, low-cost networkingto industrial plants. In the past, providing robustindustrial control networks with commercial-off-the-shelf (COTS) Ethernet equipment was a major hurdle. Now, Honeywell is able to link the benefits

of Ethernet technology with their expertise indesigning robust networks in order to deliver thepatented Fault Tolerant Ethernet (FTE) solution.The FTE design is an advanced networking solution

using COTS equipment—delivering increasedsystem availability while reducing commissioningand maintenance costs.

FTE components

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 Outstanding Networking BenefitsOffered Only by Honeywell

Fault tolerance for Ethernet using commercialequipment. Engineering is easy.

Rapid response to faults. Conventional Ethernetredundancy schemes commonly employ twoseparate Ethernet networks, with each node (aserver or station) connected to both networks. If acommunication failure occurs, the elapsed time for a particular node to switch to the other network canbe over 30 seconds, depending upon the networkcomplexity and the equipment used.

Honeywell’s FTE solution employs a single networkand does not require a server or station to re-establish its network connection. As a result, theswitchover time is typically one second!

Multiple communication paths to toleratemultiple faults. By providing more communicationpaths between nodes than dual LANs, FTEtolerates more faults—all single faults, as well asmany multiple faults. Nodes in an FTE community continually check the status of each path.

Connectivity F T E

d u a l

Number of networks 1 2

Number of communication paths between:

- dual-connection nodes

- dual-connection and single-connection nodes- single-connection nodes on the same tree/network

- single-connection nodes on different trees/networks

4

21

1

2

11

0

FTE provides more communication paths with one

network than conventional dual LAN redundancy.

Even Ethernet nodes with no FTE hardware or software can benefit from being in an FTE network.Though such nodes are not aware of the FTEcommunity, the FTE nodes are aware of theEthernet nodes and support two communicationpaths to each of them. This means the Ethernetnodes also enjoy a more available communicationsenvironment. In conventional dual-networkredundancy schemes, single-connection nodes ondifferent networks cannot communicate. In an FTEnetwork, all nodes can communicate—wherever they are connected.

FTE is also transparent to higher-level applicationprograms in FTE nodes. Those applications benefitfrom the high network availability that FTE provides,without requiring additional software configuration.

Full hardware redundancy in a single network. Since two independent networks will inevitably havesome differences in configuration and performance,the single network approach of the FTE offerssignificant advantages. And since a single networkis simpler to manage, its configuration and

performance are consistent. Analytical anddiagnostic tools can access all equipment from asingle connection, and can readily provide aperspective of the entire communication system.

And nodes can typically switch much faster between ports on the same network than betweenports on different networks.

In the FTE redundancy approach, the key to itsmultiple-path capability is its unique topology: two

parallel trees of switches and cabling— A and B—linked at the top in order to form one fault-tolerantnetwork. In this way, switches and cables are fullyredundant within a single network. The separate

identity of each tree is maintained by color-codingand tagging of cables, switches and FTE nodeports.

Each FTE node has 2 ports that connect to a switchin each tree. Ethernet nodes can connect to either tree. There may be one or more levels of switches,as well as multiple pairs of switches at each level,according to the needs of the application.

Switches

Switches

FTE FTE FTE FTE Ethernet Ethernet

A B

A B A B

FTE’s parallel tree topology provides full redundancy

in a single network.

The parallel tree topology provides multiple pathsbetween an FTE node and any other node, as wellas allowing every Ethernet node to communicate

with every other Ethernet node—no matter where inthe network the nodes may be connected.

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103

Switches

Switches


A B

A B A B

Switches

Switches


A B

A B A B

Switches

Switches


A B

A B A B

FTE provides 1 path between Ethernet nodes

Switches

Switches


A B

A B A BSwitches

Switches


A B

A B A B

Switches

Switches


A B

A B A B

Switches

Switches


A B

A B A B

FTE provides 2 paths between an FTE node and an

Ethernet node

FTE provides 4 paths between FTE nodes

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 Expandable network architecture yieldsflexibility and growth potential. An FTE networkinterconnects clusters of nodes. A cluster is a groupof nodes with high intercommunication. Nodes in acluster are typically involved with the same processunit. Examples include control servers, history

servers, operator workstations, and supervisorycontrollers.

An FTE node contains Honeywell FTE software andtwo Network Interface Controllers (NIC) —one toconnect to each tree. FTE is an option for mostHoneywell system nodes (see their respectivespecifications). FTE software can also be installedon any other node that is a Windows 2000 PC—provided that the PC and its Network InterfaceControllers have been certified together for FTE.

A typical FTE network contains several pairs of cluster switches interconnected at the next level by

a pair of backbone switches (as shown below). Asmall FTE network might consist entirely of one setof cluster switches, while a very large FTE networkmight have an additional level of switches betweenthe cluster and backbone switches.

The FTE nodes form a fault-tolerant community whose members can communicate as long as aminimum of one path exists between each of them.The maximum number of FTE nodes in acommunity is 511. Additionally, up to 511 Ethernet(non-FTE) nodes can have a single connection to

the FTE network in order to join the FTEcommunity. Then, the FTE nodes detect theseEthernet nodes and use any available path tocommunicate with them.

FTE can operate under either Windows 2000workgroups or domains. The Domain Controller must be an Ethernet node since that functionexecutes on a PC with a single Ethernet port.

Besides the fault-tolerant communications driver,FTE software includes management modules for reporting the status of an FTE node to other nodes.These FTE management modules can also beinstalled on Ethernet nodes to create monitored Ethernet nodes. The status of these nodes can bereported to FTE nodes and is displayed along withthe status of FTE nodes by the SystemManagement Display software.

A firewall or router is recommended to connect an

FTE community to any other network. An exampleof this is the Plant Information Network (PIN). Keepin mind that the FTE network must be a separatesubnet. A firewall or router is not needed if the FTEcommunity is isolated. Honeywell’s networkservices organization can provide consultingservices, installation and support services for firewalls and routers, as well as for other networkcomponents. They also certify additional PCs andnetwork equipment that may be used in an FTEnetwork application.

UNIT #1CLUSTER

UNIT #2CLUSTER

History,

Advanced

Control

UNIT #3CLUSTER

Backbone

Switches

Cluster

Switches

Plant Information Network

(PIN)

Firewall

A B A B A B

A B

FTE ex andable network architecture

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 FTE network components provide applicationflexibility. You can implement an FTE network withcopper or fiber optic cabling, or a combination of thetwo. A multimode fiber optic cable can reach up to 2km (1.2 mi), and a copper cable can reach up to

100 m (300 ft). FTE network equipment is availablewith the corresponding copper or fiber opticinterfaces.

Typically, the connections to the backbone switcheswill be multimode fiber optic, although copper cables and switches can also be used. Whilecluster cabling is normally copper, media converterscan be used when a longer distance fiber optic linkis required from a switch to a node.

Honeywell offers only fiber optic and STP (shieldedtwisted pair) copper cables, in order to meet thespecifications of communication equipmentsuppliers for reliable operation of their equipment inhigh-noise industrial environments, and to meet CEMark requirements where applicable.

Honeywell offers, and supports, the finest networkequipment—ensuring reliable network operation.We also test Honeywell releases with the revisionsof that equipment by their suppliers. Additionally,alternative equipment, or equipment for specialapplications such as long distance links, can beused when certified for FTE. A certification is valid

for the specific releases tested—subsequentrevisions require re-certification.

FTE Software – Patented fault tolerance logic – Multiple communication paths between nodes,

for multiple fault tolerance – Fast switchover to minimize system disruption – Extensive diagnostics to reduce maintenance

costs and troubleshooting time – Network status and node status displays

Network Interface Controller (NIC) – 2 single-port cards or 1 dual port card per PC – Single-port cards for application flexibility – Dual port card for performance and minimal PCI

slot consumption

Switches – 10/100 Mbps ports – Powerful multiple processors for high

performance operation – Runtime diagnostics to detect and isolate noisy

cables and jabbering nodes – Remote management functions for remotediagnostics and configuration

– STP copper and multi-mode fiber optic models

Media Converters – Convert between copper and multimode fiber

optic media – Provide flexibility for varied application

requirements

Cables – Copper STP for reliable operation under plant

electrical noise – 62.5/125 multimode fiber optic for complete

electrical isolation and longer distances

TYPICALLY FIBER OPTIC -up to 2km

CAT5 WIRE -up to 100mFiber optic media converterscan be used for long distances NIC CARD

Single or dual

Backbone

Switches

Cluster Switches SOFTWARE

CD


MediaConverters

Basic FTE Network Equipment

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 Topology examples. These examples areintended to illustrate some basic configurations—certainly many variations are possible.

Minimum: The minimum FTE network consists of one cluster with a pair of switches, a crossover cable, and cabling for as many as 12 FTE andEthernet nodes.

In the minimum example, all the distances fromnodes to switches are less than 100 meters, soSTP equipment and cabling can be usedthroughout.

FTE FTE Ethernet

Network Interface Controllers

A B

STP cables

crossover cable

Minimum FTE Network All cable lengths < 100 m

Cluster Switches

Small : A small FTE network might consist of threeclusters—each with 12 or fewer FTE and Ethernetnodes, totaling 20-30 nodes of all types. Since thereare multiple clusters, they are linked by a pair of backbone switches.

(Note: This example assumes that all the distancesfrom nodes to switches are less than 100 meters,so STP equipment and cabling can be usedthroughout. If a few nodes must be located morethan 100 meters from the switches, that connectioncan be accomplished using multimode fiber opticcables and Ethernet media converters, as shown inthe large system example.)



FTE FTE Ethernet

A B A B A B

A B

STP cables

STP cables

crossover cable

Small FTE Network All cable lengths < 100 m

Cluster Switches

STP

Backbone Switches

STP

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 Large: This example is one illustration of theflexibility of FTE topology. The diagram describesan FTE network with 15-20 clusters of varioussizes, three of which are shown.

The switches are designed for easy expansion of both the switch and the network. Each switch has

uplink and cascade slots. The uplink slot houses anadapter to link that switch to a higher-level switch of a different type, such as to link a copper switch to afiber optic switch. The cascade slot houses amodule that enables a switch to be expandedbeyond its 12 ports. This is accomplished by“stacking” additional switches on top of oneanother, and interconnecting their cascademodules. The stack of switches then functions asone logical switch. Up to eight switches of 12 portseach can be stacked, and copper or fiber opticswitches can be mixed in any combination.

In the large network example, some clusters havemore than 12 FTE and Ethernet nodes. This meansthat those clusters have expansion switches, inaddition to the base switches. The distance fromthe nodes to the cluster switches is less than 100meters—enabling the use of STP cabling. To accommodate a network of this size, there arealso expansion switches at the backbone level.Since some of the clusters are located more than

100 meters from the backbone switches, thebackbone switches have fiber optic ports, and thecabling from the cluster switches is also fiber optic.

And because the cluster switches have STPinterfaces, each switch has a fiber optic uplinkadapter connecting it to the fiber optic cable.

Also shown is a remote FTE node that is connectedto the backbone switches via a pair of Ethernetmedia converters located close to the node.Ethernet media converters are an economicalsolution for a remote node. Connecting the remotenode to STP switches would require another pair of media converters at the switches.

Connecting several remote nodes in scatteredlocations to a cluster would require mountingseveral pairs of media converters near the cluster switches. In that case, a better solution might be toadd fiber optic expansion switches to the cluster switches in order to connect the remote nodes.

If there were several nodes in the same remotelocation, one solution would be to install at theremote location a pair of STP switches with fiber optic uplink adapters, and connect the remotenodes to those switches. Then only one pair of fiber optic cables would be needed to connect theremote switches into the cluster switches.

Cluster Switches



FTE FTE Ethernet

A B A B A B

STP cables

Backbone Switches

A B

fiber optic cables

crossover cable

Large FTE Network Some cluster switch cables > 100 m

Some node cables > 100 m15-20 clusters, some with 15-20 nodes

STP

fiber optic

FTE Remote

Node

fiber optic cables

STP cables

Media Converters

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 See the status of the FTE network from anynode. Each FTE node contains software thatreports the status of its 4 communication paths toeach other node, as determined by short“heartbeat” messages that are regularly sent alongeach path. The status of each node’s paths can be

viewed from the FTE Status Display.

The FTE Status Display is an HCI-managedcomponent of the Honeywell System ManagementDisplay software, which operates within theMicrosoft Management Console (MMC)environment of Windows 2000.

The System Management Display can show notonly FTE status but also many other types of system information. It is a software packageseparate from FTE, which can be loaded onto anynode in the FTE network.

Below is an example of an FTE Status Display.Since node FTE-APP59 has been selected, thecolumns A->A, A->B, B->A, and B->B show thestatus of FTE-APP59’s communication paths toevery other node ( A and B refer to the A and Btrees of the FTE network).

If another node such as FTE-GUS34 were selected,the FTE Status Display would change to show thestatus of FTE-GUS34’s paths to other nodes.

The FTE Status Display can monitor not only thecommunication paths from an FTE node to other FTE nodes but also to Ethernet (non-FTE) nodes.In the FTE Status Display, a “1” in the column NumInterfaces indicates an Ethernet node with a singleconnection, so some communication paths to it are

shown as “N/A” (not applicable).

It is also possible for the FTE Status Display tomonitor the status of the communication paths froman Ethernet node to other nodes. Even though anEthernet node has no FTE hardware or operatingsoftware, the FTE status reporting software can beloaded into it so that it too can send heartbeatmessages and report the status of itscommunication paths. The FTE status reportingsoftware is available free of charge in order tofacilitate providing the status of all nodes in the FTEnetwork.

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103 Outstanding Network Services. Honeywell has anoutstanding network services organization that

manages all aspects of Ethernet systems—from asmall process control system to a total enterprise.Examples include:

Network planning, design, installation, andintegration—including all cabling, racks, testing,training, and documentation

Security assessment and engineering—including authorization, authentication,encryption, activity logging, intrusion detection,and virus protection

Firewall engineering, configuration, testing, and

management—providing secure remote accessto a customer’s network from anywhere in theworld

Remote monitoring of customer networks

around the clock—ensuring all components areoperating properly, including:

– networks (switches, routers, firewalls) – systems (PlantScape, TPS, PHD, servers,

any type of PC) – PC applications (running and responding).

Network Performance Management --supporting optimum operation by proactivetracking of network component performance

Remote Network Administration—ensuringcorrect installation of updates and configurationchanges for components such as servers,switches, firewalls, and routers

Procurement and support of PCs and networkequipment in order to provide consistentoperation

There are two specific services available to supportFTE.

♦ Firewall Design Service—a firewall securesand controls access to an FTE networkfrom other networks. Honeywell’s extensiveexpertise in firewall technology provides afirewall that is completely engineered andtested to meet project requirements for small networks of up to 20 nodes. Firewallsfor larger networks can be quoted on

request.♦ Device Certification Service—this service

certifies network components for use inFTE networks, using Honeywell’sexperienced network engineers and testinglaboratory facilities.

Honeywell’s network services organization canmeet all your needs for FTE, as well as for all other networks in your plant!

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Product Information Note Fault Tolerant Ethernet (FTE)September, 2002 PN03-103

PlantScape® is a registered trademark and Experion PKS™ is a trademark of Honeywell International Inc. All other products and brand and product names shown herein are trademarks of their respective owners.

While this information is presented in good faith and believed to be accurate, Honeywell disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement

with and for its customer. In no event is Honeywell liable to anyone for any indirect, special or consequential damages.The information and specifications in this document are subject to change without notice. USA: Honeywell Industry Solutions, 16404 N. Black Canyon Hwy., Phoenix, AZ 85053 /Canada: The Honeywell Centre, 155 Gordon Baker Rd., NorthYork, Ontario M2H 3N7 /Latin America: Honeywell, Inc., 480 Sawgrass Corporate Parkway, Suite 200, Sunrise, Florida 33325/Japan: Honeywell K.K.,14-6 Shibaura 1-chome, Minato-ku, Tokyo, Japan 105-0023/Asia: Honeywell Pte Ltd., Honeywell Building, 17 Changi Business Park Central 1, Singapore486073, Republic of Singapore/Pacific Division: Honeywell Pty Ltd., 5 Thomas Holt Drive, North Ryde NSW Australia 2113/Europe and Africa:Honeywell S.A. Avenue du Bourget 3, 1140 Brussels, Belgium/Eastern Europe: Honeywell Praha, s.r.o. Budejovicka 1, 140 21 Prague 4, CzechRepublic /Middle East: Honeywell Middle East Ltd., Technology Park, Cert Complex Block Q, Muroor Rd., Abu Dhabi, U.A.E.

Industry Solutionswww.acs.honeywell.com ©Honeywell International Inc.

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