Embedded control technique for distributed control systems

Details Embedded control technique for distributed control systems Embedded control technique for distributed control systems

1990-07-03

1991-06-25

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 581, 370 855, 3701101, H04J 324

Patent

active

050273493

ABSTRACT:
A control method and apparatus for an electronic system having a plurality of functional elements, both intelligent and non-intelligent, interconnected by a plurality of time-division multiplexed serial data links, wherein information is normally conveyed in time slots on the data links. Control information is exchanged between the elements by using one or more of said time slots as control channels for all control information. The format of the control information is compatible with both the intelligent elements and non-intelligent elements. The control information format includes a plurality of bits for providing command data, a plurality of address bits, a valid bit to indicate that the information being transmitted is a valid message, an interrupt bit to signal a microprocessor in an intelligent device to interrupt and service the message, and a parity bit for error checking.

REFERENCES:
patent: 4703478 (1987-10-01), Haselton et al.
patent: 4715031 (1987-12-01), Crawford et al.
patent: 4819228 (1989-04-01), Baran et al.

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