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Transportation Systems Design, Inc.
®
LONMARK
and the IEEE’s new
Rail Transit Vehicle Interface
Standards
LONMARK Transportation Meeting
Brooklyn, NY
April 28, 1999
T. J. Sullivan
Principal
Transportation Systems Design, Inc.
Oakland, CA
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Transportation Systems Design, Inc.
Presentation Overview
What is IEEE 1473
How is it used?
Where does the LONMARK Interoperability
Association fit in ?
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Transportation Systems Design, Inc.
“Plug and Play”
Mechanical Standard
Electrical Standard
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Transportation Systems Design, Inc.
TCRP Project G4/G4A
“Developing Standards for System and Subsystem
Interfaces in Electric Rail Passenger Vehicles”
Funded by National Academy of Science
– Via Transportation Research Board
– American Public Transit Association
IEEE Standard 1473
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Transportation Systems Design, Inc.
Eight Initial Working Groups
1 - Communications
2 - CB Train Control
3 - Health Monitoring
4 - Safety Standards for Software
5 - VOBC/Propulsion/Brake
6 - Auxiliary Power Systems
7 - Vehicle Passenger Information
8 - Environmental Standards
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Transportation Systems Design, Inc.
IEEE 1473 Train Network
RADIO
MODEM
COMMUNICATIONS NETWORK
CB Train Control
Health Monitoring
VOBC/Propulsion/Brake
Auxiliary Power Systems
Vehicle Passenger Information
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Transportation Systems Design, Inc.
Working Group #1: IEEE 1473
Bob Anderson, Harmon Industries
Exhaustive search and evaluation
Initial list reduced quickly to two
–Both selected as a standard
–Both can potentially interoperate
Key RTVIS Working Group
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Transportation Systems Design, Inc.
IEEE 1473
IEEE 1473 -T (TCN)
–
Dedicated, high performance rail network protocol
»
IEC Draft Standard
supported by Adtranz, Siemens, Ansaldo
Not supported by SNCF (France)
IEEE 1473 - L ( LONWORKS® )
Cost-effective, open architecture, general purpose
– Over 10 million nodes sold worldwide; >3500 OEMs
– US Rail Applications
–
» AAR’s
ECP Brake Standard (1.5 million freight cars)
» PTC Standard for Conrail / CSXT / NS
» Many light and heavy rail systems including MTA NYC Transit
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Transportation Systems Design, Inc.
Train Communications Network
Train Network
Routerr
Routerr
Routerr
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Transportation Systems Design, Inc.
IEEE 1473-L Node
Follows ISO 7- Layer OSI Model
Protocol is Open and Published
Two silicon sources
Many Development Tools
– LonMaker
» Object Oriented Design Tool
» Uses Visio drawing program
» Generates executable network software directly from Visio drawing
– Neuron “C”
» C-like program language
» Enhanced with “WHEN”
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Transportation Systems Design, Inc.
IEEE 1473-L Interfaces
78 kbps
“Free Topology”
Bus
11 General-purpose I/O Lines
PWM, ANALOG
OR SERIAL
Propulsion / Brake
Tractive Effort P-Signal
FREQUENCY
Tachometers
IEEE 1473-L
LONWORKS
NEURON
Integrated Circuit
(THREE 8-BIT
MICROPROCESSORS)
“UPLOADABLE”
APPLICATION
PROGRAM
( EEPROM )
PWM
PWM
ACTIVE TOGGLE
Train Doors
EMERGENCY
BRAKE
SERIAL
Passenger Signs
ANALOG
Load Weigh
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Transportation Systems Design, Inc.
IEEE 1473-L Program Example 1
Trainline
BRAKE
SYSTEM
B+
DOORS CLOSED
when (doors = = not closed) { brakes = ON } ;
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Transportation Systems Design, Inc.
IEEE 1473-L Program Example 2
when (loadweigh = = AW3)
{ Display (Train = (Full)) } ;
20 MPH
PELHAM 143
(AW 1)
PELHAM
PELHAM123
123
PELHAM 103
(AW 3)
(AW 1)
Prototype Control Center Graphic
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Transportation Systems Design, Inc.
Obtaining True Interoperability
The Devil is in the Details
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Transportation Systems Design, Inc.
IEEE Interoperability Issues
Existing RTVISC standards are necessary
Currently, they are not sufficient
– Many still have a “performance/functional” flavor
– Precise interfaces required to permit interoperability
Additional work is required by either or both:
– IEEE Working Groups
– LONMARK Interoperability Association
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Transportation Systems Design, Inc.
LONMARK Association
Independent Association of LONWORKS users
– Manufacturers, end-users, and integrators/car builders
Governed by industrial council
Well established interoperability guidelines
– Functional Profiles
– Complete interoperable specifications
Promotes LONMARK certified products
– Existing published guidelines
– Task groups make new guidelines
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Transportation Systems Design, Inc.
The IEEE Standards Pieces
Buyers
Suppliers
IEEE
RTVIS
WG9
Funders
LONMARK
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Transportation Systems Design, Inc.
What lies Ahead?
Process may now be “end-user” driven
TCRP Project will facilitate standardization
NYC Transit is a major standards force
– Actively participates & supports IEEE standards
– Mandates LONWORKS and LONMARK devices
– Needs 200 subway cars/year
» Until they stop running the subways in NYC
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Transportation Systems Design, Inc.
Summary
Communications Interoperability is Key
NYCT mandates LONWORKS and LONMARK
IEEE RTVIS established overall standards
LONMARK Association will help complete the
details to ensure Interoperability
You’re all welcome to join in
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Transportation Systems Design, Inc.
Questions & Discussion
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