US3895351A - Automatic programming system for standardizing multiplex transmission systems - Google Patents

Automatic programming system for standardizing multiplex transmission systems Download PDF

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Publication number
US3895351A
US3895351A US320774A US32077473A US3895351A US 3895351 A US3895351 A US 3895351A US 320774 A US320774 A US 320774A US 32077473 A US32077473 A US 32077473A US 3895351 A US3895351 A US 3895351A
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United States
Prior art keywords
control unit
output
addresses
unit
responsive
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Expired - Lifetime
Application number
US320774A
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English (en)
Inventor
James A Neuner
Maurizio Traversi
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CBS Corp
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Westinghouse Electric Corp
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Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US320774A priority Critical patent/US3895351A/en
Priority to CA187,779A priority patent/CA1000425A/en
Priority to DE2364314A priority patent/DE2364314C2/de
Priority to JP49004664A priority patent/JPS4997195A/ja
Priority to GB5993973A priority patent/GB1450929A/en
Priority to ES421895A priority patent/ES421895A1/es
Priority to BE1005616A priority patent/BE809319A/xx
Priority to FR7400184A priority patent/FR2212586B1/fr
Priority to IT7201/74A priority patent/IT1005309B/it
Priority to CH4874A priority patent/CH589902A5/xx
Priority to SE7400069A priority patent/SE404444B/xx
Application granted granted Critical
Publication of US3895351A publication Critical patent/US3895351A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/22—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling

Definitions

  • control unit is responsive to the enable signal to process the corresponding input ad dressed into a desired output format and transmit the same to the corresponding output unit. If an address not associated with an input is generated by the control unit there will be no corresponding output unit to enable processing within the control unit, hence, the address will be ignored. Accordingly, the control unit can be designed to generate a number of addresses in excess of the number of inputs to accommodate expansion of the system by the incorporation of additional inputs and output units. The additional addresses, and any corresponding fault conditions activated, will thus be ignored until expansion of the system is desired.
  • a specific application to nuclear reactor position indication is described which enables a standardized design to be incorporated regardless of the size of the reactor employed (i.e.. the number of rods monitored).
  • This invention pertains in general to multiplex trans' mission systems and more particularly to a standardized design for such systems to enable the accession and transmission of additional inputs.
  • Modules should be provided on a per-rod basis only. so that modules associated with non-existing rods can be eliminated while maintaining the intra-wiring capability of a full system.
  • the error codes generated by the absence of unnecessary units should be automatically ignored by the central control unit without the need for special ized programming of any kind. while the error code generated by removing a legitimate encoder unit should always be recognized and indicated.
  • this invention provides an automatic programming system for standardizing multiplexed transmission systems to accommodate a varying number of inputs.
  • the plurality of inputs to be transmitted are respectively addressed from a central control unit which provides a second concurrent corresponding address to an output unit associated with the input addressed.
  • the output unit is responsive to the second address to provide an enable signal to the control unit.
  • the enable signal activates the control unit to process the corresponding input addressed into a desired output format and transmit the same to the corresponding output unit. Addresses generated by the control unit which have no corresponding input are ignored inasmuch as no corresponding enable signal exists to activate the control processing circuitry.
  • the control unit can be designed to generate a number of addresses in excess of the number of inputs and output units to accommodate expansion of the system by the incorporation of additional input and output units responsive to corresponding ones of the excess of addresses.
  • FIG. I is a block diagram of a position indication system incorporating the concepts of this invention.
  • FIG. 2 is a block diagram illustrative of the intercourse of signals employed in the embodiment illustrated in FIG. 1.
  • the detector coils and the associated containment electronics employed within the position indication system contemplated by this in vention and respectively described by reference characters l and in FIGS. 1 and 2 are divided into two separate identical groups A and B. Each group is capable of providing redundant information on the true position of each control rod with one-half the overall resolution of the system.
  • the two sets of digital data are transmitted through independent time division multiplexed channels to the reactor control room where independent error checking is performed.
  • the two sets of verified data are sent to a central control unit and combined to determine the true position of the control rod with full resolution.
  • Rod position information is available through independent and separate outputs including a location real time display using light emitting diodes for the reactor operator. and a plant computer which operates as a data logger.
  • a block diagram of the overall rod position indication system with its individual component systems is illustrated in FIG. 1. Redundancy is implemented within the detectors l0, containment electronics 20 and display area as pictorially illustrated by groups A and B. respectively identifying the separate signal trains. The operation of each of the individual blocks identified by legends can better be understood by reference to the explanation provided in copending application Ser. No. 320.792. W. E. Case 44.067 cited above.
  • Standardization is implemented in accordance with this invention by employing a logic signal (60" signal) which is returned to the central control unit 30 by each display unit 40 when addressed, as illustrated in the block diagram provided in FIG. 2. Since one display unit is associated with two encoder units corresponding to a given rod location and is addressed at the same time as the encoder units whenever new data is re quested for that rod. the return of a 60" or *enable signal from a display unit will acknowledge not only the presence of that display unit but also the existence of a rod to be monitored in the corresponding location and therefore will verify the validity of any existing error code generated. All the (30" signal terminals on the various display units are OR-wired together in a single bus configuration. Any display unit, when plugged into the system. will activate the signal when addressed by the control unit and will enable acknowledgement of any possible corresponding error codes which may be generated.
  • a logic signal 60" signal
  • the computer can be programmed to know which rods are used and which are not so that it can properly accept or reject incoming error codes.
  • a completely standardized intra-system wiring configuration primarily employing bus wiring can then be established to accommodate the largest possible number of control rods.
  • the only affect of a missing encoder unit is the generation of a error code l l l l 1" during the corresponding address period as described in the operational description of application Ser. No. 320,792, W. E. Case 44.067.
  • the standard central control unit is hard wired to ignore the resulting error code, as explained in the aforecited application with accompanying figures. unless a 00" signal is activated at the same time by the display units. This signal results from the OR-busing of the individual (10" signals generated by each display unit when addressed by the control unit. Removal of a display unit will cause the GO output to float and assume a 0" logical state in the corresponding address period. (the same as if no display card were addressed) with the result that the central control unit will ignore any error signal generated during that address period.
  • This invention permits the implementation of a fully standardized intra-system wiring scheme that can be employed for any reactor plant configuration.
  • the resulting interconnection layout is particularly appealing because it extensively uses busing of corresponding terminal pins and minimizes specialized point-to-point connections.
  • An exemplary wiring layout and circuit schematic for each of the units illustrated in block form, together with an operational description thereof. is provided in the aforecited copending application.
  • the main advantage provided by this invention is that it permits any control rod position indication system and most other multiplexing applications to be implemented by means of a completely standardized wiring scheme employing a minimum number of identical printed circuit modules. This results in a larger volume of identical intra-system wiring packages and makes possible the use of cost saving manufacturing techniques such as automated point-to-point wiring or printed circuit backwiring; both made even simpler by the predominance of bus oriented interconnection patterns. Thus. the reoccurring engineering time and enginecring costs required for each new reactor plant and multiplexing application by previous conventional approaches are minimized. in addition. by entirely avoiding hard-wired customization. both training for and the execution of maintenance procedures are greatly simplified.
  • An automatic programming system for standardizing multiplexed transmission systems comprising:
  • a central control unit electrically coupled to the output of each of said input units and operable to generate. sequence and transmit a plurality of first and second corresponding addresses; and plurality of output units.
  • each output unit corresponding to at least one input unit and responsive to a corresponding one of said second addresses to communicate a corresponding enable signal to said control unit, each input unit receiving a corresponding first address and responsive thereto to communicate said data signal to said control unit.
  • said control unit being responsive to said enable signal corresponding to said input unit addressed. to process said data signal and communicate an output signal representative thereof to said corresponding output unit.
  • a digital position indication system for displaying the relative position of a movable element with respect to fixed known coordinates comprising:
  • a sensory system responsive to the element's position to provide discrete electrical outputs indicative thereof
  • an encoder system operable upon said discrete outputs to provide a digital coded output representation of the elemcnts position
  • an interface system operable upon said digital coded outputs to respectively transmit said digital coded outputs upon a first corresponding command address signal
  • a central control unit for generating. sequencing and transmitting said first command address to said interface system and a second corresponding command address.
  • said interface system being responsive to said first address to effect transmission of a corresponding one of said digital coded outputs to said control system for processing into a decoded display signal;
  • each display unit corresponding to at least one of said digital coded outputs and responsive to a corresponding one of said second addresses to communicate a corresponding enable signal to said control unit.
  • said control unit being responsive to said enable signal corresponding to said digital coded output addressed by said corresponding first address to process said digital coded output and communicate a display output signal representative thereof to said corresponding display unit.
  • said sensory system includes a plurality of sensors corresponding to the plurality of elements. said sensors being responsive to the respective element's position to provide corresponding discrete electrical outputs indicative thereof;
  • said encoder system includes a plurality of encoder units corresponding to said plurality of sensors and operable upon the corresponding respective discrete outputs to provide a corresponding digital coded output representation of the corresponding elements position;
  • said plurality of first and second corresponding addresses is greater in number than said plurality of encoder units so as to form an excess of said first and second addresses without corresponding digital coded outputs so that the position indication system can be expanded to monitor the position of additional elements by including a corresponding sensor. encoder unit and display unit for each additional element and assigning one of said corresponding excess of first and second addresses to each additional corresponding digital output and display unit. respectively.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Safety Devices In Control Systems (AREA)
  • Selective Calling Equipment (AREA)
US320774A 1973-01-03 1973-01-03 Automatic programming system for standardizing multiplex transmission systems Expired - Lifetime US3895351A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US320774A US3895351A (en) 1973-01-03 1973-01-03 Automatic programming system for standardizing multiplex transmission systems
CA187,779A CA1000425A (en) 1973-01-03 1973-12-10 Automatic programming system for standardizing multiplex transmission systems
DE2364314A DE2364314C2 (de) 1973-01-03 1973-12-22 Zeitmultiplexübertragungssystem für mehrere Kanäle
JP49004664A JPS4997195A (es) 1973-01-03 1973-12-28
GB5993973A GB1450929A (en) 1973-01-03 1973-12-28 Automatic programming system for standardizing multiplex transmission systems
ES421895A ES421895A1 (es) 1973-01-03 1973-12-29 Un sistema automatico de programacion multiplexado para normalizar sistemas multiplexados de transmision de senal.
BE1005616A BE809319A (fr) 1973-01-03 1974-01-02 Systeme de programmation automatique pour la standardisation desystemes de transmission multiplex
FR7400184A FR2212586B1 (es) 1973-01-03 1974-01-03
IT7201/74A IT1005309B (it) 1973-01-03 1974-01-03 Apparecchiatura multiplex automati ca di programmazione per la unifi cazione dei sistemi multiplex di trasmissione di segnali
CH4874A CH589902A5 (es) 1973-01-03 1974-01-03
SE7400069A SE404444B (sv) 1973-01-03 1974-01-03 Tidsmultiplext signaloverforingssystm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US320774A US3895351A (en) 1973-01-03 1973-01-03 Automatic programming system for standardizing multiplex transmission systems

Publications (1)

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US3895351A true US3895351A (en) 1975-07-15

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US320774A Expired - Lifetime US3895351A (en) 1973-01-03 1973-01-03 Automatic programming system for standardizing multiplex transmission systems

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US (1) US3895351A (es)
JP (1) JPS4997195A (es)
BE (1) BE809319A (es)
CA (1) CA1000425A (es)
CH (1) CH589902A5 (es)
DE (1) DE2364314C2 (es)
ES (1) ES421895A1 (es)
FR (1) FR2212586B1 (es)
GB (1) GB1450929A (es)
IT (1) IT1005309B (es)
SE (1) SE404444B (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006460A (en) * 1974-12-10 1977-02-01 Westinghouse Electric Corporation Computer controlled security system
US4035771A (en) * 1973-02-27 1977-07-12 Bayer Aktiengesellschaft Process for the remote transmission and indication of electrical measured values in electrolysis cells
US4241330A (en) * 1978-09-28 1980-12-23 General Atomic Company Multiple-processor digital communication system
US4371496A (en) * 1980-06-18 1983-02-01 Westinghouse Electric Corp. Position indication system
WO1993015482A2 (en) * 1992-01-25 1993-08-05 A&B (Fire Prevention) Ltd. Remote monitoring system
CN105702303A (zh) * 2016-01-20 2016-06-22 中广核研究院有限公司 反应堆控制棒运动控制装置
US9697916B2 (en) * 2008-01-09 2017-07-04 Analysis And Measurement Corporation Automated system for on-line monitoring and diagnostics of rod position indication coils for nuclear power plants

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444518A (en) * 1965-10-22 1969-05-13 Electronic Associates System for display and control of logic element outputs
US3470542A (en) * 1967-03-17 1969-09-30 Wang Laboratories Modular system design
US3551885A (en) * 1968-01-18 1970-12-29 Honeywell Inc Validity apparatus for computer based process control equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3539998A (en) * 1967-07-12 1970-11-10 Burroughs Corp Communications system and remote scanner and control units
US3571805A (en) * 1968-08-07 1971-03-23 North American Rockwell Random or sequential access multichannel multiplexer
AT305093B (de) * 1969-06-17 1973-02-12 Uninorm Anstalt Anlage zur Übertragung von Informationen
CH545467A (de) * 1971-03-08 1973-12-15 Biviator Sa Anlage zur Überwachung mehrerer Personen oder Objekte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444518A (en) * 1965-10-22 1969-05-13 Electronic Associates System for display and control of logic element outputs
US3470542A (en) * 1967-03-17 1969-09-30 Wang Laboratories Modular system design
US3551885A (en) * 1968-01-18 1970-12-29 Honeywell Inc Validity apparatus for computer based process control equipment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035771A (en) * 1973-02-27 1977-07-12 Bayer Aktiengesellschaft Process for the remote transmission and indication of electrical measured values in electrolysis cells
US4006460A (en) * 1974-12-10 1977-02-01 Westinghouse Electric Corporation Computer controlled security system
US4241330A (en) * 1978-09-28 1980-12-23 General Atomic Company Multiple-processor digital communication system
US4371496A (en) * 1980-06-18 1983-02-01 Westinghouse Electric Corp. Position indication system
WO1993015482A2 (en) * 1992-01-25 1993-08-05 A&B (Fire Prevention) Ltd. Remote monitoring system
WO1993015482A3 (en) * 1992-01-25 1993-09-02 A & B Fire Prevention Ltd Remote monitoring system
GB2278475A (en) * 1992-01-25 1994-11-30 A & B Fire Prevention Ltd Remote monitoring system
GB2278475B (en) * 1992-01-25 1995-09-13 A & B Fire Prevention Ltd Remote monitoring system
US9697916B2 (en) * 2008-01-09 2017-07-04 Analysis And Measurement Corporation Automated system for on-line monitoring and diagnostics of rod position indication coils for nuclear power plants
CN105702303A (zh) * 2016-01-20 2016-06-22 中广核研究院有限公司 反应堆控制棒运动控制装置

Also Published As

Publication number Publication date
GB1450929A (en) 1976-09-29
SE7400069L (es) 1974-09-24
CH589902A5 (es) 1977-07-29
FR2212586A1 (es) 1974-07-26
ES421895A1 (es) 1976-09-01
BE809319A (fr) 1974-07-02
DE2364314A1 (de) 1974-07-04
JPS4997195A (es) 1974-09-13
SE404444B (sv) 1978-10-02
IT1005309B (it) 1976-08-20
CA1000425A (en) 1976-11-23
FR2212586B1 (es) 1978-07-07
DE2364314C2 (de) 1984-05-24

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