EP1866887A2 - Alimentation de transducteur de mesure pour l'automatisation des processus - Google Patents

Alimentation de transducteur de mesure pour l'automatisation des processus

Info

Publication number
EP1866887A2
EP1866887A2 EP06725336A EP06725336A EP1866887A2 EP 1866887 A2 EP1866887 A2 EP 1866887A2 EP 06725336 A EP06725336 A EP 06725336A EP 06725336 A EP06725336 A EP 06725336A EP 1866887 A2 EP1866887 A2 EP 1866887A2
Authority
EP
European Patent Office
Prior art keywords
transmitter
signal line
power supply
transmitted
microcontroller
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.)
Granted
Application number
EP06725336A
Other languages
German (de)
English (en)
Other versions
EP1866887B1 (fr
Inventor
Michael Korn
Alfred Umkehrer
Thomas Joegel
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.)
Endress and Hauser Wetzer GmbH and Co KG
Original Assignee
Endress and Hauser Wetzer GmbH and Co KG
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 DE102005027047A external-priority patent/DE102005027047A1/de
Application filed by Endress and Hauser Wetzer GmbH and Co KG filed Critical Endress and Hauser Wetzer GmbH and Co KG
Publication of EP1866887A2 publication Critical patent/EP1866887A2/fr
Application granted granted Critical
Publication of EP1866887B1 publication Critical patent/EP1866887B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Definitions

  • the invention relates to a transmitter power supply for process automation technology
  • field devices are often used which serve to detect and / or influence process variables.
  • field devices are level gauges, mass flow meters, pressure and temperature measuring devices, pH redox potential measuring devices, conductivity meters, etc., which detect the corresponding process variables level, flow, pressure, temperature, pH value or conductivity value as sensors.
  • actuators z.
  • valves that control the flow of a liquid in a pipe section or pumps that change the level in a container.
  • the signal transmission between field devices and higher-level units is often based on the known 4-20 mA standard.
  • a galvanic separation takes place during the transmission of the signals between the control system, which is arranged in the safe area, and the field device, which is arranged in the intrinsically safe area.
  • galvanic isolation also takes place in the transmitter supply unit.
  • Intelligent field devices have tei wise extensive diagnostic functionalities that z. B. evaluate the loads of sensors or actuators, maintenance times determine and warn the user of the danger of an early failure of the field device.
  • Transmitter power supply for process automation technology that for powering a transmitter and for forwarding current signals that are transmitted between the transmitter and a parent unit via a signal line, is used, characterized in that the transmitter power supply SG connected via a modem to the signal line L.
  • the essential idea of the invention is that in a transmitter power supply a modem and a microcontroller, which is equipped with a signaling device is connected to provide. This allows the transmitter power supply and the transmitter to communicate with each other. Additional information is transmitted from the transmitter to the transmitter power supply and signaled by means of the signaling device.
  • Separation unit provided, which serves for galvanic isolation of the transmitted between the transmitter and control system current signals.
  • the signaling device is designed as a switching contact and / or as a display element.
  • FIG. 1 block diagram of an inventive
  • a transmitter power supply MSSG a transmitter MU and a control system LS, which serves as a parent unit, are shown schematically.
  • the transmitter MU may, for. B. to the temperature sensor TMT 162 Fa. Endress + Hauser act.
  • the transmitter power supply SG in the signal path from the transmitter MU to the control system LS on a barrier EX according to the regulations on hazardous areas, a separation unit TTE for galvansichen separation and a current source SQ on.
  • the microcontroller ⁇ C is connected to a signaling device SE which consists of an optical display element AE (eg LED diode) and a switching contact SK.
  • a signaling device SE which consists of an optical display element AE (eg LED diode) and a switching contact SK.
  • AE eg LED diode
  • SK switching contact
  • the transmitter MU detects a reading which is converted into a 4-20 mA current signal. This current signal is transmitted via the line section L1 to the measuring transformer supply SG and further via the line section L2 to the control system LS.
  • the transmitter MU In addition to the measured value, the transmitter MU also provides further additional information essentially diagnostic information.
  • the communication between the transmitter power supply SG and the transmitter MU takes place as already mentioned according to the HART standard.
  • the transmitter supply unit SG which acts as a master, at regular intervals the transmitter MU, which serves as a slave, query.
  • microcontroller ⁇ C The additional information is evaluated in microcontroller ⁇ C in accordance with the settings made and can then be signaled acoustically by the signaling device SE via the switching contact SK connected siren or via the display element AE with an LED diode.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention concerne une alimentation de transducteur de mesure pour l'automatisation des processus. Afin d'assurer l'alimentation en énergie d'un transducteur de mesure et de transmettre des signaux de courant qui sont transmis par l'intermédiaire d'une ligne de signalisation entre le transducteur de mesure et une unité connectée en amont, un microcontrôleur (?C) connecté par un modem à la ligne de signalisation (L) et un dispositif de signalisation (SE) commandé par le microcontrôleur (?C) sont ajoutés dans l'alimentation de transducteur de mesure (SG). Le dispositif de signalisation (SE) sert à signaler des informations supplémentaires qui sont fournies par le transducteur de mesure (MU) et qui sont transmises au microcontrôleur (?C) par l'intermédiaire de la ligne de signalisation (L).
EP06725336.9A 2005-04-07 2006-03-28 Alimentation de transducteur de mesure pour l'automatisation des processus Not-in-force EP1866887B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005016141 2005-04-07
DE102005027047A DE102005027047A1 (de) 2005-06-10 2005-06-10 Messumformerspeisegerät für die Prozessautomatisierungstechnik
PCT/EP2006/061071 WO2006106055A2 (fr) 2005-04-07 2006-03-28 Alimentation de transducteur de mesure pour l'automatisation des processus

Publications (2)

Publication Number Publication Date
EP1866887A2 true EP1866887A2 (fr) 2007-12-19
EP1866887B1 EP1866887B1 (fr) 2015-01-28

Family

ID=37025107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06725336.9A Not-in-force EP1866887B1 (fr) 2005-04-07 2006-03-28 Alimentation de transducteur de mesure pour l'automatisation des processus

Country Status (3)

Country Link
US (1) US20090216496A1 (fr)
EP (1) EP1866887B1 (fr)
WO (1) WO2006106055A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006055396A1 (de) * 2006-11-22 2008-05-29 Endress + Hauser Gmbh + Co. Kg Signaltrenneinheit für eine Zwei-Leiter-Prozessregelschleife
DE102016122714A1 (de) * 2016-11-24 2018-05-24 Endress + Hauser Wetzer Gmbh + Co Kg Kommunikations-Adapter für einen Transmitter eines Feldgeräts

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469746A (en) * 1993-03-30 1995-11-28 Hitachi, Ltd. Electromagnetic flow meter
FR2727230B1 (fr) * 1994-11-18 1996-12-20 Commissariat Energie Atomique Dispositif d'adaptation de capteurs ou d'actionneurs de type "hart" avec un reseau local industriel de type "fip" et procede de mise en oeuvre de ce dispositif
US6611775B1 (en) * 1998-12-10 2003-08-26 Rosemount Inc. Electrode leakage diagnostics in a magnetic flow meter
US6765968B1 (en) * 1999-09-28 2004-07-20 Rosemount Inc. Process transmitter with local databus
US7773715B2 (en) * 2002-09-06 2010-08-10 Rosemount Inc. Two wire transmitter with isolated can output

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006106055A2 *

Also Published As

Publication number Publication date
US20090216496A1 (en) 2009-08-27
WO2006106055A3 (fr) 2007-01-18
WO2006106055A2 (fr) 2006-10-12
EP1866887B1 (fr) 2015-01-28

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