© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Wireless Gateways Smart Wireless Gateways The 21 st Century modem Frank Williams May 1, 2007

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO The Plant : A complex environment  sec msec 1 sec secs min hours Courtesy: Apprion Adding wireless provides opportunities, but presents challenges

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO The new competitive reality! Global competition demanding higher productivity More data, with more intelligence, yielded from more points throughout the plant, or factory. Basically, a new paradigm in productivity gain : data availability when and where needed we have seen this before 4-20mA  Hart Marshalling cables  Foundation Field bus, Ethernet Automation  DeviceNet, Profibus, etc Alarm systems  Pagers, SMS, GSM,

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Plant or Factory has more wireless Wireless Ethernet Wireless I/O Sensors Analog / digital Pulse / Freq Pressure / Flow Wireless Data PLC to PLC DCS to Remote PLC/DCS to HMI Protocol connectivity Wireless finds new applications With greater reliability And more flexible at less cost

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO The largest constraint to collecting information is … the cost/hassle of wiring The largest constraint to sharing information is… data incompatibility Plant & Factory Information hurdles wireless wireless gateways $40/linear ft mobility mobility downtime downtime protocols speed speed network structure network structure

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Wireless Network challenges Reliable information (data) transfer with… -larger amounts of information demanded -more mobile, flexible and greater scalability -networked from different, and more places Connectivity to and from high-speed industrial LAN’s -Profibus (12Mbit/s),DeviceNet (500kbit/s), Modbus (1Mbit/s), Ethernet (10/100Mbit/s) -Interconnectivity to different LAN’s - protocol incompatibility Security (process as well as business side of things ) -hackers, competitors and other perpetrators -jamming or unwanted messages into process -“malicious” damage?- e.g. disgruntled employees

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO SMART Wireless Gateways offer… Advances on traditional modem Protocol conversion - adds flexibility Faster by using efficient wireless protocol Better network bandwidth management Reliable and secure data transfer

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO “Smart” Radio Modem Data bus Gateways can act as “smart” radio modems to overcome limitations of normal radio modems Data bus Data protocol only on data bus side Data is converted to a highly efficient wireless protocol on the radio side The Smart Gateway can now yield tremendous benefit to the User… Smart Gateway Smart Gateway Smart Gateway

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO LAN Speed Problem Conventional Radio Modems Normal radio modems handle data protocols at 9600bit/s, 19.2kbit/s, etc – slow in today’s information-hungry, high-speed environment Radio Modem Radio Modem --- data bus speed must be reduced to match the speed of the radio modem, affecting the pre-existing bus ---

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO LAN Speed Solution Wireless Gateways Wireless Gateways connect to the LAN at full bus data rate Existing LAN devices are not affected. profibus – 12Mbit/s Modbus – 1Mbit/s Ethernet – 10/100Mbit/s Transfer at protocol speed profibus – 12Mbit/s Modbus – 1Mbit/s Ethernet – 10/100Mbit/s wireless

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Response Time Problems Conventional Radio Modem High speed data protocols require fast response - Profibus (11Mbit/s), DeviceNet (1Mbit/s) etc Radio Modem Radio Modem Master sends a command to the slave - the radio delays the command Slave responds, but too late Master device times out and comms stops X

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Wireless Gateway Master sends a command - the Gateway responds, the Master does not time out The SMART Gateway transmits the information - fast response is maintained by exception reporting wireless protocol The second SMART Gateway passes on the information: Communications is successful and continues A newer approach

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Network Structure Constraints Conventional Radio Modems The Wireless Network has the same network structure limitations as the Host protocol - m ost are master-slave polling networks Radio Modem Radio Modem Radio Modem Radio Modem

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Wireless network is independent of the data protocol - peer to peer Multiple masters - no problems Slave to slave - easy add Path routing – flexible & quick Network Structure Improvement User Scalability & flexibility

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Network Bandwidth Management Conventional Radio Modems Master-slave polling networks become slow as the network size increases Radio network becomes busy as size increases Radio Modem Radio Modem Radio Modem Radio Modem

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO SMART Wireless Gateways Gateways use a more intelligent wireless protocol Based on exception reporting (transmitting on a change), plus transfers on demand Better Bandwidth Management

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Protocol Incompatibility Modbus DF1 Data bus interconnectivity Normal radio modems can only connect the same protocol Profibus x x x x Radio Modem Radio Modem Radio Modem Radio Modem

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Data bus interconnectivity SMART Gateways use a “neutral” wireless protocol - different data buses can be interconnected Modbus DF1 Profibus Protocol Compatibility

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO SECURITY Can Wireless Gateways help against: hackers, competitors and other perpetrators jamming or unwanted messages into process “malicious” damage?- e.g. disgruntled employees

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Security Data bus Conventional Radio Modems Security achieved by data encryption. Unable to limit transfer of data or authenticate the transfer. Data bus Any data can be transferred Radio Modem Radio Modem Radio Modem

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Data bus SMART Wireless Gateways Gateways can only transfer known data Firewall protection to level “7” Blacklist/white list AES encryption routine Data bus Only known approved data can be transferred Security

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Example - Tank Gauging Profibus Ethernet Profibus

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Example - Tank Gauging Profibus Ethernet Add a High Level Switch Most Gateways have capability for connection of discrete, analog, and pulse I/O High level switch

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Profibus Ethernet Profibus High level switch Devicenet Modbus + Internet “Wireless Information Backbone”

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Summary Wireless Gateway = Smart Radio Modem  Overcomes speed limitations with fast data protocols  Allows connection at full bus speed  Provides peer-to-peer networking for scalability / flexibility  Better wireless network bandwidth management  Secure data bus expansion – encryption & firewall  Data bus interconnectivity - protocol conversion  Internet connectivity - web enabled interface  Allows formation of Wireless Information Backbone

© ELPRO Technologies NORCAL ISA Think Wireless…Think ELRPO Thank you Frank Williams – office – cell