LonWorksTM On Amtrak

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LonWorksTM On Amtraks Acela Express

• Introduction
• Players
• Networks
• Systems
• Status

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LonWorksTM On Amtraks Acela Express

• Introduction
• Amtraks Original Goal
• Reap some of the Benefits of the prolific use of
  micro-processor based systems
• How
• Specify the centralized collection of subsystem
  operation and status data
• Why
• Improve information availability
• Thereby improving transportation operations, and,
• Improve equipment turn-around time

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LonWorksTM On Amtraks Acela Express

• Introduction
• Amtrak did not specify how to integrate data
  collection, only that it was to be accomplished
• Why?
• The integration of the data from the diverse
  subsystems in the industry is a difficult task
• Potential System providers had diverse approaches
  as to how to accomplish this task

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LonWorksTM On Amtraks Acela Express
Levels of Integration
OSI Laver Model Purpose LonTalk Services
Application Application compatibility Network variables, generic message functions, standard types objects
Presentation Data interpretation Foreign frame Interpretation
Session Remote actions Request-response, polling
Transport End-to-end reliability Acknowledged service, multicast, authentication, duplicate detection
Network Destination addressing Domain wide broadcast, destination addressing, router support
Datalink Media access framing Framing, data encoding, CRC error checking, predictive-CSMA, collision
Physical Electrical interconnect Media specific details, transceiver type, physical connect
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LonWorksTM On Amtraks Acela Express

• Players
• Amtrak End User
• Bombardier
• Systems Integration on Superliner II, NJ Comet
  IV, Kuala Lumpur Metro, NYCTA R-142
• Vapor Canada
• Bombardier hardware supplier and industry
  experience
• Echelon LonWorksTM
• System and equipment for industrial application
• LonTalk protocol provides all 7 of the levels of
  the OSI model

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LonWorksTM On Amtraks Acela Express

• Networks
• Car Internal Network (CIN)
• LonWorks Twisted Pair Transceivers
• FTT-10A, 78kbps
• Power Brake SubNetwork (PBIN)
• LonWorks Twisted Pair Transceivers
• FTT-10A, 78kbps
• Separated for Independent Traffic Control
• Trainset Monitoring Network
• Special Physical Layer

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LonWorksTM On Amtraks Acela Express
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LonWorksTM On Amtraks Acela Express
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LonWorksTM On Amtraks Acela Express

• Trainset Monitoring Network (TNET)
• Token Bus Network
• Industry-standard 50 ohm Shielded Twisted Pair
• Based on IEEE 802.4,
• except for physical layer
• Hardened for environment
• High Noise Immunity
• High Voltage Open Circuit Withstand
• Current Limit to control contact degradation
• Opto-isolation to control inter-car voltage
  variations
• Transfer speed 170 kbps

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LonWorksTM On Amtraks Acela Express

• System Variables
• Train-wide Status
• Subsystem Operational Status
• Subsystem Analog Values
• Maintenance Events

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LonWorksTM On Amtraks Acela Express

• System Variables
• Train-Wide Status
• 480 VAC Available prevent false maintenance
  events
• No Active Cab
• All Doors Closed
• No Motion
• Layover Mode
• Master Door Control Station Side
• Main Pressure Reservoir Ok Prevent false events
• Door Open Inhibit Active

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LonWorksTM On Amtraks Acela Express

• System Variables
• Subsystem Operational Status
• Periodically transmitted variables, rate
  adjustable
• 16 to 96 individual Operational Status bits
• Some bits common to all systems
• Some bits unique to each subsystem
• Train Operational Values speed, pressures
• Car monitoring Unit forwards variables to the
  Displays
• Car Monitoring Unit stores variables rolling
  history

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LonWorksTM On Amtraks Acela Express

• System Variables
• Subsystem Analog Values
• Non-essential for Train Operation,
• Coach Interior Temperature
• Battery voltage
• Etc.
• Display Unit requests value from Car Monitoring
  Unit
• Car Monitoring Units sets a refresh rate for the
  variable from the specific Subsystem
• Display Unit will state when variable is no
  longer needed
• Car Monitoring Unit resets the refresh rate to
  zero

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LonWorksTM On Amtraks Acela Express

• System Variables
• Maintenance Events
• Fault Detection (I.e., LVPS Failed)
• Maintenance Forecasting (I.e., Door slow closing)
• Information (I.e., ATC C/O Active)
• Manual Fault Entry (I.e., Broken mirror)
• Type of Events
• Set/Reset (I.e., online/offline)
• Pulse (I.e., one time occurrence event)
• Information
• Code, Description, Type
• Car Monitoring Unit tags with Date, Time, Etc.

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LonWorksTM On Amtraks Acela Express
STATUS
Primary Operating Display (POD) In an ALERTER
display
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LonWorksTM On Amtraks Acela Express
STATUS
Primary Operating Display (POD) In an Degraded
Operation Mode (POD or MFD in fault)
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LonWorksTM On Amtraks Acela Express
STATUS
Multifunction Display (MFD) Status of Tilt System
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LonWorksTM On Amtraks Acela Express
STATUS
Multifunction Display (MFD) Maintenance Events
For Wheel Slip System
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LonWorksTM On Amtraks Acela Express