Optimizing Wireless Technology: Perspectives of the End User

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Optimizing Wireless Technology Perspectives of
the End User

• Dick Caro, CMC Associates
• Acton, MA USA

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Presenter

• Dick Caro
• CEO of CMC Associates Business Strategy
  Professional Services
• Vice President of ARC Advisory Group in Dedham,
  Massachusetts
• Chairman of ISA SP50 and formerly of IEC Fieldbus
  Standards Committees
• ISA100 Founder and Co-Chair User Working Group
• Senior Manager with Arthur D. Little, Inc. in
  Cambridge, MA
• Founder of Autech Data Systems
• Director of Marketing at ModComp
• The Foxboro Company
• BS and MS in Chemical Engineering, and an MBA
• ISA Fellow
• Certified Automation Professional
• Process Automation Hall of Fame
• Authored 3 books on automation networks

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Data Sources

• ISA100 WG8 User Requirements document
• Control Magazine survey Jan-July 2007 (almost 500
  responses)
• InTech Magazine market study ongoing
• ISA100 Use Cases
• ISA100 presentations and sessions
• Direct user interviews
• Personal experience

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Topics

• User industry profile
• Current wireless applications
• Density of instrumentation
• Future wireless applications
• Host integration of wireless networks
• Legacy wired networks
• Factors influencing wireless networks in
  automation
• Powering wireless field devices
• Latency requirements

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User Industry Profile
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Other

• Discrete parts manufacturing
• Building Automation
• SCADA pipelines, power, water/waste
• Systems integration (variety of uses)

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Current Wireless Applications

• Based on devices from many different suppliers
• Accutech
• Honeywell
• Emerson
• Omnex
• Dust
• Sensicast
• Crossbow
• Safety monitoring
• Tank farms
• Well-head monitoring
• Water/waste monitoring

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Density of Instrumentation(not just wireless)
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Instrument Density

• Survey results indicate an average density of 4
  devices per 100 sq. meters
• Biased by large plants and SCADA
• Projected density 10-15 devices per 10 sq. meters
• Note that many plants have tall structures with
  instruments distributed along the tall equipment
  (distillation)
• Equipment clustered into plant unit operations
• Few devices between plant units

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Future Wireless Applications
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Host Integration of Wireless Networks
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Integration With Legacy Wired Networks
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Legacy Wired Networks

• Dominance of Ethernet
• Modbus/TCP
• EtherNet/IP
• PROFINET
• Foundation Fieldbus HSE not mentioned
• Other included
• HART
• DeviceNet
• DH
• AB DF1
• DNP3
• ASi
• ControlNet

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Factors Influencing Use of Wireless Devices
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Factor Analysis

• Note
• Single network for many applications
• Single network standard
• If combined would total 30 and be the most
  important factor
• Reliability and Security
• Total 50
• Each are more important than battery life

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Powering Wireless Devices
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Power Analysis

• Survey did not ask about power scavenging
• Solar/Light power
• Vibration
• Thermal generation
• Air-power generation
• Inductive generation

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Latency Requirements
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Latency Interpretation

• Most users view wireless for monitoring and
  alerting
• A few visualize use for control
• Alerting gives a clue for actual applications
• When an alert becomes an alarm
• Scanning is now more frequent
• Priority increases
• Cannot wait for seconds/minutes before reporting
  an alarm
• Implies device must originate alarms

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User Worries About Wireless

• Coexistence/interference especially at 2.4 GHz
• Multiple protocols sharing the same bandwidth
• ISA100
• WirelessHART
• ZigBee
• WiFi
• Bluetooth
• Microwave ovens in control rooms
• Cordless telephones
• Jamming of 2.4 GHz spectrum
• Terrorism
• Sabotage
• Network privacy

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Conclusions

• Most users visualize wireless for monitoring and
  alerting
• A few plan to eventually use wireless for control
• Users want a single protocol for the plant
  wireless network
• Many wireless applications are new not
  previously measured with wired instruments
• Use of wireless networks is very important to
  most users
• Battery life is important, but not critical
• Reliability and security are critical