CA1173927A - Communication system and method - Google Patents

Communication system and method

Info

Publication number
CA1173927A
CA1173927A CA000405695A CA405695A CA1173927A CA 1173927 A CA1173927 A CA 1173927A CA 000405695 A CA000405695 A CA 000405695A CA 405695 A CA405695 A CA 405695A CA 1173927 A CA1173927 A CA 1173927A
Authority
CA
Canada
Prior art keywords
current
circuit
current variations
communication system
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000405695A
Other languages
English (en)
French (fr)
Inventor
Felix J. Houvig
Ronald H. Rowlands
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell Inc
Original Assignee
Honeywell Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/317,083 external-priority patent/US4520488A/en
Application filed by Honeywell Inc filed Critical Honeywell Inc
Application granted granted Critical
Publication of CA1173927A publication Critical patent/CA1173927A/en
Expired legal-status Critical Current

Links

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CA000405695A 1981-11-02 1982-06-22 Communication system and method Expired CA1173927A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/317,083 US4520488A (en) 1981-03-02 1981-11-02 Communication system and method
US317,083 1981-11-02

Publications (1)

Publication Number Publication Date
CA1173927A true CA1173927A (en) 1984-09-04

Family

ID=23232038

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000405695A Expired CA1173927A (en) 1981-11-02 1982-06-22 Communication system and method

Country Status (2)

Country Link
JP (1) JPS5885649A (ja)
CA (1) CA1173927A (ja)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60119139A (ja) * 1983-11-30 1985-06-26 Yokogawa Hokushin Electric Corp ２線式伝送器
JPS60249441A (ja) * 1984-05-24 1985-12-10 Yokogawa Hokushin Electric Corp 二線式デ−タ伝送装置
JPH0744488B2 (ja) * 1984-12-07 1995-05-15 横河電機株式会社 二線式デ−タ伝送装置
US4607247A (en) * 1985-08-12 1986-08-19 The Babcock & Wilcox Company On-line serial communication interface from a transmitter to a current loop
US4816703A (en) * 1985-08-12 1989-03-28 The Babcock & Wilcox Company On-line serial communication interface from a current loop to a computer and/or terminal
US4729125A (en) * 1985-08-12 1988-03-01 The Babcock & Wilcox Company On-line serial communication interface to a transmitter from a current loop
JPS6264804A (ja) * 1985-09-05 1987-03-23 Yokogawa Electric Corp 信号伝送装置
JP2735174B2 (ja) * 1985-10-16 1998-04-02 株式会社日立製作所 ２線式通信方法
JPS6295485A (ja) * 1985-10-22 1987-05-01 Omron Tateisi Electronics Co 検出センサ装置
JPS62213439A (ja) * 1986-03-14 1987-09-19 Yamatake Honeywell Co Ltd 通信方式
JPS63167595A (ja) * 1986-12-27 1988-07-11 Hitachi Ltd 二重化コミニユケ−タ
JPS63314700A (ja) * 1987-06-17 1988-12-22 Yokogawa Electric Corp ２線式パルス伝送方式
JPH0633723Y2 (ja) * 1987-09-03 1994-08-31 山武ハネウエル株式会社 通信装置
JPH01156418U (ja) * 1988-04-21 1989-10-27
JPH0650555B2 (ja) * 1989-02-09 1994-06-29 株式会社日立製作所 ４線式フイールド計器装置とその通信方法
JP2580343B2 (ja) * 1989-10-13 1997-02-12 株式会社日立製作所 フィールド計器システム及びコミュニケータ
JP2007139793A (ja) * 2006-12-25 2007-06-07 Hitachi Ltd 気体流量計
DE102008041030A1 (de) * 2008-08-06 2010-02-11 Robert Bosch Gmbh Vorrichtung und Verfahren zur Erfassung einer Messgröße

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524209B2 (ja) * 1971-05-15 1977-02-02
JPS50156463A (ja) * 1974-06-07 1975-12-17
JPS5238807A (en) * 1975-09-22 1977-03-25 Hitachi Ltd Signal transmission unit
JPS567588A (en) * 1979-06-30 1981-01-26 Matsushita Electric Works Ltd Remote control unit for time sharing multiplex transmission

Also Published As

Publication number Publication date
JPH0447358B2 (ja) 1992-08-03
JPS5885649A (ja) 1983-05-23

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Legal Events

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MKEX Expiry