EP0472169A2
Expired / Lapsed
EP
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Plant monitoring and control system
Assignee: Toshiba Corp
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Filing: 1991-08-20
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Granted: —
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Expires: 2011-08-20
Abstract
Abstract A plant monitoring and control system is specialized in a plant such as a reactor power plant, which is provided with plural process systems (A, B, ...N) functionally divided, and is communicable between the process systems with broadcast communication. Detection signals corresponding to process variables of the process systems, detected by the detectors (11A, 11B, ... 11N), are supplied into the transmission line (14) by the remote process input-output unit (13A, 13B ... 13N). Command signals can be also supplied into the line via a input unit (161A, 161B ... 161N) and a console controller (162A, 162B ... 162N) of a corresponding operator console (16A, 16B ... 16N). A corresponding process controller (15A, 15B ... 15N) takes in the detection signals and command signals from the line (14) and returns calculated control signals into the line. The remote process input-output unit (13A, 13B ... 13N) controls the corresponding process device (12A, 12B ... 12N) by giving the control signals. Each of the process controllers incorporates a control backup element against control failure of other process controllers, then eliminating the multiplex construction of the process controller (15A, 15B ... 15N) for a redundant system. The console controller (162A, 162B ... 162N) controls images on a display unit (163A, 163B ... 163N) in the corresponding operator console (16A, 16B ... 16N). A display backup element can also be incorporated in the console controllers respectively, then simplifying the console construction.
Inventors
- 👤 Yoshiyuki Kimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:58
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/20; G06F11/202; G06F11/2035; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0259; G05B23/0267; G05B23/0272; G06F11/2017; G21; G21C; G21C17/00; G05B2223/00; G05B2223/06; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y04; Y04S; Y04S10/00; Y04S10/50; Y04S10/52
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
224 words
A plant monitoring and control system comprising: a plurality of detectors for detecting respective process variables of plural process systems which are functionally divided in a plant; a plurality of process devices for controlling the process systems by control signals; a transmission line for transmitting signals for broadcast communication; a plurality of means for supplying detection signals from the plural detectors into the transmission line at every assigned time; a plurality of input units, usable by operators, provided corresponding to the every process system; a plurality of means for supplying command signals from the plural input units into the transmission line at every assigned time; a plurality of means for controlling the process, which take in the detection signals and command signals corresponding to the process systems from the transmission line at every assigned time, calculate the control signals by operation in accordance with assigned control function for the process systems, and supply the control signals into the transmission line at every assigned time; a plurality of means for driving the process devices, which take in the control signals corresponding to the process systems from the transmission line at every assigned time, and supply the control signals to the process devices respectively; and a control backup means for backing up the process control means, in case some of the process control means get faulty.
Claim 2
Dependent Claim
299 words
A plant monitoring and control system comprising: a plurality of detectors for detecting respective process variables of plural process systems which are functionally divided in a plant; a plurality of process devices for controlling the process systems by control signals; a transmission line for transmitting signals for broadcast communication; a plurality of means for supplying detection signals from the plural detectors into the transmission line at every assigned time; a plurality of input units, usable by operators, provided corresponding to the every process system; a plurality of means for supplying command signals from the plural input units into the transmission line at every assigned time; a plurality of means for controlling the process, which take in the detection signals and command signals corresponding to the process systems from the transmission line at every assigned time, calculate the control signals by operation in accordance with assigned control function for the process systems, and supply the control signals into the transmission line at every assigned time; a plurality of means for driving the process devices, which take in the control signals corresponding to the process systems from the transmission line at every assigned time, and supply the control signals to the process devices respectively; a plurality of means for controlling displays, which take in, corresponding to the process systems, the detection signals and the control signals from the transmission line as well as the command signals from the input unit at every assigned time, and form display signals by operation in accordance with assigned display function for the process systems; a plurality of display units for displaying each images based on the display signals from the display control means; and a display backup means for backing up the display control means, in case some of the display control means get faulty.
Claim 3
Dependent Claim
320 words
A plant monitoring and control system comprising: a plurality of detectors for detecting respective process variables of plural process systems which are functionally divided in a plant; a plurality of process devices for controlling the process systems by control signals; a transmission line for transmitting signals for broadcast communication; a plurality of means for supplying detection signals from the plural detectors into the transmission line at every assigned time; a plurality of input units, usable by operators, provided corresponding to the every process system; a plurality of means for supplying command signals from the plural input units into the transmission line at every assigned time; a plurality of means for controlling the process, which take in the detection signals and command signals corresponding to the process systems from the transmission line at every assigned time, calculate the control signals by operation in accordance with assigned control function for the process systems, and supply the control signals into the transmission line at every assigned time, a plurality of means for driving the process devices, which take in the control signals corresponding to the process systems from the transmission line at every assigned time, and supply the control signals to the process devices respectively; a control backup means for backing up the process control means, in case some of the process control means get faulty; a plurality of means for controlling displays, which take in, corresponding to the system equipments, the detection signals and the control signals from the transmission line as well as the command signals from the input unit at every assigned time, and form display signals by operation in accordance with assigned display function for the process systems; a plurality of display units for displaying each images based on the display signals from the display control means; and a display backup means for backing up the display control means, in case some of the display control means get faulty.
Claim 4
Dependent Claim
29 words
A system as claimed in claim 1 or 3, wherein the control backup means is composed of plural control backup means corresponding to the plural process control means respectively.
Claim 5
Dependent Claim
42 words
A system as claimed in claim 4, wherein the process control means and the control backup means are incorporated in a single process controller, and both the process control means and control backup means operate using time sharing in the process controller.
Claim 6
Dependent Claim
75 words
A system as claimed in claim 4, wherein the single control backup means is provided with a backup order table in which a backup order for other process systems is included, an arithmetic operation procedure table in accordance with control functions which are assigned to the process systems to be backed up, and means for calculating the control signals on the basis of data from the backup order table and the arithmetic operation procedure table.
Claim 7
Dependent Claim
60 words
A system as claimed in claim 4, wherein the plural control backup means interchange each other information representing task amounts in the corresponding self process control means, updates and memorizes an order of less task at a certain time interval on the basis of the interchanged information, and backs up the faulty process control means according to the updated order.
Claim 8
Independent Claim
19 words
A system as claimed in any of claims 1 to 7, wherein the plant is a reactor power plant.
Claim 9
Dependent Claim
58 words
A system as claimed in claim 8, wherein the plural process control means and the plural control backup means are each grouped according to differences in attribute of the control function assigned to the process control means, and each of the control backup means acts as a substitute for the faulty process control means in the group only.
Claim 10
Dependent Claim
27 words
A system as claimed in claim 3, wherein the display backup means is composed of plural display backup means corresponding to the plural display control means respectively.
Claim 11
Dependent Claim
40 words
A system as claimed in claim 10, wherein the display control means and the display backup means are incorporated in a single controller, and both the display control means and display backup means operate using time sharing in the controller.
Claim 12
Dependent Claim
27 words
A system as claimed in claim 11, wherein the controller, the input unit, and the display unit are incorporated in an operator console at every process system.
Claim 13
Dependent Claim
58 words
A system as claimed in claim 8, wherein the plural display control means and the plural display backup means are each grouped according to differences in attribute of the display function assigned to the display control means, and each of the display backup means acts as a substitute for the faulty display control means in the group only.
Claim 14
Dependent Claim
68 words
A system as claimed in claim 10, wherein the input unit is provided with a keyed switch having operator-changed ON and OFF positions and supplying signals corresponding the switching positions, and the display backup means takes in the signal from the keyed switch, judges the switching position of the keyed switch, and backs up the display control means, in case only when the switching position is ON position.
Claim 15
Dependent Claim
46 words
A system as claimed in claim 10, wherein the input unit is capable of taking in passwords from operators, and the display backup means takes in the passwords, and backs up other display control means, in case only when the passwords coincides with a predetermined one.
References Cited (Backward Citations)
No citation records indexed.
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