Signal transmission system in a digital controller system

Details Signal transmission system in a digital controller system Signal transmission system in a digital controller system

1979-06-13

1981-03-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 79, 370 13, 371 34, H04J 300

Patent

active

042544998

ABSTRACT:
A digital controller system with a hierarchy organization having a high level control section, a plurality of low level control sections which are monitored and controlled by the high level control section, and a plurality of loop station means connected to each low level control section for transmitting signals directly to a process variable circuit and receiving signals directly from the process variable circuit, a signal transmission system in which return and collation are effected for every word in the data transmission between the loop station means and the low level control sections, and return and collation for every word and transfer for every block are selectively carried out in the data transmission between the low level control sections and the high level control section.

REFERENCES:
patent: 3634830 (1972-01-01), Baskin
patent: 3699525 (1972-10-01), Klavins
patent: 3843834 (1974-10-01), Burke
patent: 3995258 (1976-11-01), Barlow
patent: 4097695 (1978-06-01), Grace et al.
patent: 4118772 (1978-10-01), Takada

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