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MIL/STD-1553B Bus Overview

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

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  1. MIL/STD-1553B BusOverview J. Frederick Bartlett Fermilab June 3, 1999

  2. 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

  3. 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

  4. 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

  5. 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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