Process communication link

Details Process communication link Process communication link

1979-07-02

1981-06-02

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370 92, 370 95, H04J 600

Patent

active

042715059

ABSTRACT:
A distributed, electronic process control system is disclosed having a plurality of remotely located stations interacting to control a complex industrial process. The stations communicate via a process communication link which supports secure, multi-master communication. The link provides a transparent medium of exchange for the secure transfer of process status and control information among the stations, such that each station may initiate and control system communication for a predetermined time period.

REFERENCES:
patent: 3597549 (1971-08-01), Farmer
patent: 3659271 (1972-04-01), Collins
patent: 3818447 (1974-06-01), Craft
patent: 3851104 (1974-11-01), Willard
patent: 3961139 (1976-06-01), Bowman

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