US3651484A
Expired / Lapsed
US
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Multiple process control system
Assignee: Elsag Bailey Inc
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Filing: 1969-08-12
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Granted: 1972-03-21
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Expires: 1989-08-12
Abstract
Abstract In a process control system employing a digital computer, an apparatus for and method of simultaneously controlling a plurality of processes. A parallel control input interface interrogates a set of output variables from each process and forms a plurality of data words which are addressed for display to the digital computer. The computer develops control words from the data words by the execution of a command program and addresses a parallel control output interface. The parallel control output interface accepts the control words from the digital computer and interprets the control words to simultaneously control the plurality of processes.
Inventors
- 👤 George R Smeallie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/05; G05B19/054; G05B15/00; G05B15/02; G05B2219/00; G05B2219/10; G05B2219/11; G05B2219/1125
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A process control system employing a central processor, a control interface for performing parallel control operations, comprising: input interface means for simultaneously interrogating a plurality of sets of process signal variables, each said set having a plurality of outputs, said input interface means including means for assembling for use by said central processor a plurality of data words, each said data word having a pattern corresponding to the accumulation of said outputs from said sets, said input interface means also including means for address decoding said assembled data words to transfer said data words to said central processor, said central processor having means for developing a plurality of control words from said data words; and output interface means including means for address decoding said control words to transfer said control words from said central processor to said output interface means, said output interface means including means for accepting said control words to simultaneously control said plurality of sets of process signal variables.
Claim 2
Dependent Claim
162 words
A process control system employing a central processor, a control interface for performing parallel control operations, comprising: input interface means for simultaneously interrogating a plurality of sets of process signal variables, each said set having a plurality of outputs, said input interface means including means for assembling for use by said central processor a plurality of data words, each said data word having a pattern corresponding to the accumulation of said outputs from said sets, said input interface means also including means for address decoding said assembled data words to transfer said data words to said central processor, said central processor having means for developing a plurality of control words from said data words; and output interface means including means for address decoding said control words to transfer said control words from said central processor to said output interface means, said output interface means including means for accepting said control words to simultaneously control said plurality of sets of process signal variables.
Claim 3
Dependent Claim
30 words
The control interface of claim 1, wherein said assembling means includes means for contiguously accumulating similar output variables from each of said sets of process variables in corresponding data words.
Claim 4
Dependent Claim
23 words
The control interface of claim 2, wherein said computer control word developing means includes means for performing logical operations on said data words.
Claim 5
Dependent Claim
23 words
The control interface of claim 3, wherein said computer control word developing means includes means for performing mathematical operations on said data words.
Claim 6
Independent Claim
98 words
The method of simultaneously controlling a plurality of processes, each process having a set of output signal variables, which comprises the steps of: a. interrogating and assembling the output variables of the processes as a plurality of data words for display to a central processor, b. address decoding the assembled data words for input to said central processor, c. processing the data words within said central processor to develop a plurality of control words, d. address decoding the control words for output, and e. accepting and interpreting each control word to simultaneously control the plurality of process variables.
Claim 7
Independent Claim
98 words
The method of simultaneously controlling a plurality of processes, each process having a set of output signal variables, which comprises the steps of: a. interrogating and assembling the output variables of the processes as a plurality of data words for display to a central processor, b. address decoding the assembled data words for input to said central processor, c. processing the data words within said central processor to develop a plurality of control words, d. address decoding the control words for output, and e. accepting and interpreting each control word to simultaneously control the plurality of process variables.
Claim 8
Dependent Claim
23 words
The method of claim 5, wherein said step of assembling includes contiguously accumulating similar output variables from said sets in corresponding data words.
Claim 9
Dependent Claim
18 words
The method of claim 6, wherein said step of processing includes performing logical operations on the data words.
Claim 10
Dependent Claim
19 words
The method of claim 7, wherein said step of processing also includes performing mathematical operations on the data words.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |