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MIL/STD-1553B Bus Overview. J. Frederick Bartlett Fermilab June 3, 1999. MIL/STD 1553 Field Bus Support. The MIL/STD-1553B standard 1 MHz clock Manchester II bi-phase code Transformer coupling Bus lengths 100 meters+ 16-bit word size 20 μ sec/word Status word for each transaction

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Mil std 1553b bus overview

MIL/STD-1553B BusOverview

J. Frederick Bartlett

Fermilab

June 3, 1999


Mil std 1553 field bus support
MIL/STD 1553 Field Bus Support

  • The MIL/STD-1553B standard

    • 1 MHz clock

    • Manchester II bi-phase code

    • Transformer coupling

    • Bus lengths 100 meters+

    • 16-bit word size

    • 20 μ sec/word

    • Status word for each transaction

    • High noise rejection

    • Very Robust


Mil std 1553 field bus properties
MIL/STD 1553 Field Bus Properties

  • Addressing structure

    • Remote terminal (RT) - 31

    • Broadcast (all RT’s)

    • Subaddress - 30

    • Word count - 1 to 32

    • Mode function


Vxworks epics 1553 support
VxWorks/EPICS 1553 Support

  • VxWorks Driver

    • Uses a POSIX queue for serialization

    • Multiple transactions per queue element (atomic)

    • User callback function

    • Long data blocks sequenced as multiple transactions by the driver

  • EPICS driver wrapper


Vxworks epics 1553 support1
VxWorks/EPICS 1553 Support

  • Generic record (mil1553)

    • No device module

  • Generic device (planned)

    • AI, AO, BI, BO, LONGIN, LONGOUT, MBBI, MBBO, WF

  • Rack monitor

    • Complex record example

    • 1U rack profile

    • 64 A/D channels

      • Read with two 1553 transactions

    • 8 D/A channels

    • 4 binary channels

      • Input/output selection

      • 32 word per channel


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