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WO2018184766A1 - Appareil de terrain de la technique d'automatisation à alimentation électrique par câble ethernet - Google Patents

Appareil de terrain de la technique d'automatisation à alimentation électrique par câble ethernet Download PDF

Info

Publication number
WO2018184766A1
WO2018184766A1 PCT/EP2018/054928 EP2018054928W WO2018184766A1 WO 2018184766 A1 WO2018184766 A1 WO 2018184766A1 EP 2018054928 W EP2018054928 W EP 2018054928W WO 2018184766 A1 WO2018184766 A1 WO 2018184766A1
Authority
WO
WIPO (PCT)
Prior art keywords
field device
ethernet
connection
power over
field
Prior art date
Application number
PCT/EP2018/054928
Other languages
German (de)
English (en)
Inventor
Tobias Paul
Harald SCHÄUBLE
Original Assignee
Endress+Hauser SE+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
Application filed by Endress+Hauser SE+Co. KG filed Critical Endress+Hauser SE+Co. KG
Publication of WO2018184766A1 publication Critical patent/WO2018184766A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40045—Details regarding the feeding of energy to the node from the bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40221—Profibus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/4026—Bus for use in automation systems

Definitions

  • Level gauges, flowmeters, pressure and temperature measuring devices, pH redox potential measuring devices, conductivity meters, etc. which record the corresponding process variables level, flow, pressure, temperature, pH or conductivity.
  • actuators such as valves or pumps, are used to control the flow of a liquid in a single fluid
  • Pipe section or the level can be changed in a container.
  • field devices are all devices that are used close to the process and that provide or process process-relevant information. In the context of the invention, field devices are therefore in particular also remote I / Os,
  • Radio adapter or generally understood devices that are arranged on the field level.
  • Power over Ethernet designates a possibility with which networkable devices are also supplied with power via the Ethernet cable.
  • PoE Power over Ethernet
  • Automation systems still two- or four-wire field devices, which are connected via a two- or four-wire wiring with each other and at least one parent unit, for example.
  • a control unit PLC common.
  • the two- or four-wire field devices known from the prior art are designed such that the measured value communicates in an analog manner via the two-wire wiring or the two-wire line, i. is transmitted.
  • the transmission is usually based on the 4 to 20 mA standard.
  • Automation technology common field bus with each other and at least one parent unit are connected.
  • the bus-powered field devices known from the prior art are designed such that the measured value is communicated digitally via the fieldbus. Since usually the wiring of such an automation system, especially in the case that is to be switched from two- or four-wire field devices or bus-powered field devices on Power over Ethernet based field devices, a significant cost, it is desirable that a high cabling effort is avoided.
  • Cabling overhead can be converted to Pover over Ethernet-based field devices.
  • a power over Ethernet-based field device of automation technology comprising:
  • a sensor and / or actuator for determining and / or setting a process variable
  • an Ethernet connection arranged on the field device housing for connecting the field device to an Ethernet-based network, so that the field device can be supplied with energy via the Ethernet connection and can exchange data with the network;
  • a field device electronics is adapted to provide the at least one further field device connection with energy, so that a connected to the other field device connection further field device can be supplied with energy and further set up is, data with the other field device
  • the invention use is made of the fact that when powering a field device at a measuring point by means of Power-Over-Ethernet, a power of 3.84 W is already available in the smallest class at the terminal, ie the field device. This power is not completely required by the field device of the measuring point itself, so that it is possible according to the invention to supply at least one further field device, which is correspondingly connected to the field device fed by means of Power Over Ethernet, with energy.
  • the Power Over Ethernet based field device is included according to the invention arranged such that it communicates data, in particular measured values, with the connected field device, process them and can pass on accordingly. In this way, a step-by-step conversion of the existing automation systems to Power over Ethernet can take place without great initial costs and with minimal wiring effort.
  • the at least one further field device connection is set up so that at least one field device, which is configured to transmit at least one measured value digitally, can be connected as a further field device and the field device electronics are furthermore configured such that the at least one connected to the further field device terminal field device, which is adapted to transmit at least one measured value digitally, is supplied with energy and that data between the Ethernet-based network and the at least one field device can be communicated.
  • the field device electronics are furthermore configured such that the at least one connected to the further field device terminal field device, which is adapted to transmit at least one measured value digitally, is supplied with energy and that data between the Ethernet-based network and the at least one field device can be communicated.
  • the field device electronics to be set up such that the at least one field device, which is set up to transmit at least one measured value digitally, can transmit the at least one measured value according to one of the following protocols:
  • HART protocol which preferably provides a multidrop mode, a Profibus PA protocol, or
  • the at least one further field device connection is set up as a further field device, a field device, which is adapted to transmit at least one measured value analog, connectable and the field device electronics is further adapted to that on field device connectable to the field device field device, which is adapted to transmit at least one measured value analog, according to an analog 4 to 20-mA standard can be supplied with energy and that data with the at the other
  • Field device connection connectable field device according to the 4 to 20 mA standards are communicable.
  • the object is also according to the invention by a system of
  • Automation technology solved comprising an automation system with at least: an Ethernet-based network;
  • a Power over Ethernet cable that connects the Ethernet-based network to the Power over Ethernet-based field device via the Ethernet port; and at least one further non-Power over Ethernet-based field device, wherein the further field device is connected to the further supplying field device connection of the Power over Ethernet-based field device, so that the further supplying field device connection supplies the further field device with energy and further serves that the further Power over Ethernet-based field device data can not communicate with the Ethernet-based network through the Power over Ethernet-based field device.
  • the at least one further field device is designed as a field device, which is set up to transmit at least one measured value digitally
  • the system further comprises a field bus, which is at least the field device which is set up. to transmit at least one measured value digitally connected to the further supplying field device connection of the Power over Ethernet-based field device
  • the field device electronics is further configured to supply the field device connected to the field device connection with energy and data connected to the field device connected to the field device to communicate over the fieldbus according to a bus protocol.
  • the development may further comprise a plurality of field devices, which are each configured to transmit at least one measured value, which are connected via the fieldbus to the Power over Ethernet-based field device, wherein the field device electronics is further adapted to the multiple field devices with energy to supply and communicate data with the several other field devices according to the bus protocol.
  • the development can very particularly preferably provide that the fieldbus is designed as a HART fieldbus, a Profibus PA or an FF and the further field device or the further field devices is or are configured to have the at least one measured value corresponding to the
  • the further field device is designed as a field device which is set up to transmit at least one measured value analogously and the system further comprises a two-wire connection, which includes the further field device with the further supplying field device connection of the Power over Ethernet -based field device connects, wherein the field device electronics is further configured to provide the field device connected to the field device via the two-wire connection according to a 4 to 20-mA standard with power and data to the other field device according to the 4 to 20-mA standard communicate.
  • Fig. 1 a an example of a known from the prior art
  • Fig. 1 b an example of a known from the prior art
  • FIG. 2 a shows an example of a design of an automation system with Power-over-Ethernet-based field devices
  • FIG. 2 b shows an example of a configuration of an automation system with Ethernet-based field devices, which are supplied with energy via their own energy supply unit
  • FIG. 2 a shows an example of a design of an automation system with Power-over-Ethernet-based field devices
  • FIG. 2 b shows an example of a configuration of an automation system with Ethernet-based field devices, which are supplied with energy via their own energy supply unit
  • FIG. 3 is a schematic representation of a first embodiment of a power over Ethernet-based field device according to the invention.
  • Fig. 4 an automation system with a hazardous area and a non-hazardous area in which the power over Ethernet-based field device according to the invention is preferably used.
  • Figure 1 a shows an example of a known from the prior art
  • Automation system in which the field devices 20 and 30 of the individual measuring points via a two-wire line 21 to a parent unit 10, for example.
  • a programmable logic controller (short: PLC) are connected.
  • the automation system shown may refer to measuring or monitoring a level of a tank and includes two two-wire field devices 20, the first two-wire field device 20, the level by radar and the second field device 20, the temperature of the medium to calculate a normal volume measures .
  • the two two-wire field devices 20 are connected to the PLC 10 via a two-wire line 21 for this purpose, both to transmit data, in particular the measured value, as well as to be supplied with energy.
  • the two-wire field devices 20 are designed to communicate the data in such a way that they convert the data into an analog current signal, for example the analogue 4 ... 20 mA current signal common in automation technology, and vice versa.
  • the communication between the two-wire field devices 20 and the PLC 10 is then via the analog 4 ... 20 mA current signal.
  • the data is transmitted by Frequency Shift Keying (FSK) by superimposing a high-frequency oscillation on the low-frequency analog current signal.
  • FSK Frequency Shift Keying
  • each field device 30 is connected via a two-wire connection 21 to the parent unit 10.
  • HART also allows a digital communication to multiple field devices 30 via a common data bus or field bus 31.
  • 1 b shows an example of such a structure of an automation system, in which the field devices 30 of the individual
  • Measuring points are connected via a common fieldbus 31 to the parent unit 10.
  • the HART specification provides a so-called multidrop operation.
  • multidrop operation the superordinated unit 10, for example the
  • the current for operating the fieldbus 31 connected to the field devices 30 available by impressing a current of 4 mA on the field bus 31 for feeding and each parallel to the fieldbus connected field device 30 is set up such that it data with about +/- 0.5 mA modulated onto the impressed current for HART communication.
  • Automation system substantially corresponds to the structure shown in Fig. 1 b.
  • FIG. 2 a shows by way of example a basic structure of an automation system with Power-over-Ethernet-based field devices.
  • all field devices 40 used with the higher-level unit 10 for example, a PoE switch, respectively via a
  • Ethernet-based field devices 50 are used with switching functionality without Power over Ethernet, each having its own power supply 52, eg. A power supply , (Fig. 2b).
  • a power supply e. A power supply
  • FIG. 3 shows a schematic representation of a first exemplary embodiment of a Power over Ethernet-based field device 60 according to the invention.
  • the field device 60 has a field device housing 61, depending on the configuration, a sensor and / or an actuator 62, an Ethernet connection 63, which is arranged on the field device housing 61 is and a field device electronics 65, which controls the sensor and / or actuator 62 and controls the provided by the field device 60 provided functionality on.
  • the field device 60 has at least one further field device connection 64, which is likewise arranged on the field device housing 61.
  • the at least one further field device connection is designed in such a way and connected to the field device electronics, that a further field device 20 or 30 connected to the further field device connection can be supplied with energy.
  • the field device electronics 65 of the field device according to the invention is designed for this purpose such that the energy in the PoE-based field device 60 via the
  • Ethernet port 63 is provided, in part, the at least one other
  • Field device 20 or 30 is available when it is connected to the other field device port 64. Furthermore, the field device electronics 65 are set up so that data can be communicated between the Ethernet connection 63 of the PoE-based field device 60 and the at least one field device 20 or 30 connected to the further field device connection 64, so that the PoE-based field device as it were
  • the at least one further field device connection 64 either an ordinary two-wire field device 20, as shown in FIG. 1a and described accordingly, or a bus-fed field device 30, as shown in FIG is described accordingly connected. Furthermore, a number of bus-fed field devices 30 can also be connected to the further field device connection 64
  • Field device branch of an existing automation system can be connected.
  • the field device electronics 65 are configured so that the bus-powered field devices 30 connected in series can communicate their respective data with the PoE-based field device 60 via a corresponding Ethernet tunnel. In this way, the implementation effort at the system level or
  • Automation system with bus-powered field devices can be additionally facilitated.
  • the PoE-based field device 60 has a plurality of further field device connections 64 which are arranged on the field device housing 61, so that a plurality of further field devices 20 and 30 can be connected.
  • the PoE-based field device 60 may be designed such that both a plurality of further bus-fed field devices 30 can be connected to the several other field device connections 64 or that a further two-wire field device 20 can be connected to each further field device connection 64.
  • the PoE-based field device 60 may also be designed in such a way that both bus-fed field devices 30 and two-wire field devices 20 can be connected via respectively different further field device connections 64.
  • the bus-fed field devices 30 in particular such field devices come into consideration, which transmit their data according to the HART protocol, the Profibus PA or FF protocol.
  • the PoE-based field device can be used in particular in automation systems with explosion-endangered 80 and non-hazardous areas 90.
  • the PoE-based field device 60 can be arranged, for example, in the non-hazardous area 90 and at least one further field device in the form of a two-wire field device 20 or a bus-powered field device 30, which is arranged in the explosion-hazard region 80 via the at least one further field device connection 64 be connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Programmable Controllers (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention concerne un appareil de terrain de la technique d'automatisation à alimentation électrique par câble Ethernet comprenant : un boîtier d'appareil de terrain (61) ; un capteur et/ou un actionneur (62) pour déterminer et/ou régler une grandeur de processus ; une connexion Ethernet (63), disposée sur le boîtier d'appareil de terrain, pour connecter l'appareil de terrain à un réseau Ethernet (70) de telle sorte que l'appareil de terrain peut être alimenté par l'intermédiaire de la connexion Ethernet et ledit appareil de terrain peut échanger des données avec le réseau ; au moins une autre connexion d'appareil de terrain (64) alimentaire, disposée sur le boîtier d'appareil de terrain (61), pour connecter au moins un autre appareil de terrain (20, 30) ; une électronique d'appareil de terrain (65), laquelle est conçue pour alimenter en énergie l'au moins une autre connexion d'appareil de terrain (64) de telle sorte qu'un autre appareil de terrain (20, 30), connecté à une autre connexion d'appareil de terrain (64), peut être alimenté en énergie et ledit autre appareil de terrain est en outre conçu pour échanger des données avec l'autre appareil de terrain (20, 30) de telle sorte que les données peuvent être communiquées entre le réseau Ethernet et l'autre appareil de terrain, connecté à l'autre connexion d'appareil de terrain.
PCT/EP2018/054928 2017-04-07 2018-02-28 Appareil de terrain de la technique d'automatisation à alimentation électrique par câble ethernet WO2018184766A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017107535.6A DE102017107535A1 (de) 2017-04-07 2017-04-07 Power over Ethernet-basiertes Feldgerät der Automatisierungstechnik
DE102017107535.6 2017-04-07

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WO2018184766A1 true WO2018184766A1 (fr) 2018-10-11

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WO (1) WO2018184766A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653606A (zh) * 2019-10-09 2021-04-13 菲尼克斯电气公司 用于连接控制装置和现场设备的模块化接口系统
CN113532506A (zh) * 2020-04-09 2021-10-22 Vega格里沙贝两合公司 测量装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021101498A1 (de) 2021-01-25 2022-07-28 Vega Grieshaber Kg Feldgerät mit APL-Field-Switch

Citations (3)

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WO2007012014A2 (fr) * 2005-07-19 2007-01-25 Rosemount Inc. Module d'interface presentant une fonction alimentation electrique par cable ethernet
WO2007012074A1 (fr) * 2005-07-20 2007-01-25 Rosemount Inc. Dispositif de champ a alimentation sur ethernet
WO2016192789A1 (fr) * 2015-06-03 2016-12-08 Brainlab Ag Gestion d'alimentation sur ethernet pour dispositifs de puissance

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DE102006036770A1 (de) * 2006-08-07 2008-02-14 Siemens Ag Verfahren zur Inbetriebnahme von mindestens einem Feldgerät
US8132035B2 (en) * 2007-05-25 2012-03-06 Raven Technology Group, LLC Ethernet interface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012014A2 (fr) * 2005-07-19 2007-01-25 Rosemount Inc. Module d'interface presentant une fonction alimentation electrique par cable ethernet
WO2007012074A1 (fr) * 2005-07-20 2007-01-25 Rosemount Inc. Dispositif de champ a alimentation sur ethernet
WO2016192789A1 (fr) * 2015-06-03 2016-12-08 Brainlab Ag Gestion d'alimentation sur ethernet pour dispositifs de puissance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653606A (zh) * 2019-10-09 2021-04-13 菲尼克斯电气公司 用于连接控制装置和现场设备的模块化接口系统
CN112653606B (zh) * 2019-10-09 2022-12-27 菲尼克斯电气公司 用于连接控制装置和现场设备的模块化接口系统
CN113532506A (zh) * 2020-04-09 2021-10-22 Vega格里沙贝两合公司 测量装置

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