EP1519257B1 - Unité de traitement de données avec une unité de découplage - Google Patents

Unité de traitement de données avec une unité de découplage Download PDF

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Publication number
EP1519257B1
EP1519257B1 EP04022728.2A EP04022728A EP1519257B1 EP 1519257 B1 EP1519257 B1 EP 1519257B1 EP 04022728 A EP04022728 A EP 04022728A EP 1519257 B1 EP1519257 B1 EP 1519257B1
Authority
EP
European Patent Office
Prior art keywords
unit
data
display
data processing
processing unit
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 - Lifetime
Application number
EP04022728.2A
Other languages
German (de)
English (en)
Other versions
EP1519257A3 (fr
EP1519257A2 (fr
Inventor
Markus Herzog
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 DE10344864A external-priority patent/DE10344864A1/de
Priority claimed from DE20314961U external-priority patent/DE20314961U1/de
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1519257A2 publication Critical patent/EP1519257A2/fr
Publication of EP1519257A3 publication Critical patent/EP1519257A3/fr
Application granted granted Critical
Publication of EP1519257B1 publication Critical patent/EP1519257B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Definitions

  • the invention relates to a data processing unit with a decoupling unit.
  • Technical facilities are controlled and operated by means of digital, programmable data processing systems.
  • any type of technical equipment and systems both in single arrangement and in data networking, e.g. understood by a fieldbus.
  • technical devices in an industrial application are to be understood as individual devices, such as e.g.
  • a technical device can also be an entire production plant in which locally distributed resources are used to operate an entire technical process, e.g. a chemical plant, a production line or a processing plant.
  • HMI devices ie Human Machine Interface
  • B + B devices devices for "operator control and monitoring” technical equipment
  • HMI device is a generic term and also includes all components belonging to this group of devices, in particular also an HMI display panel or also short HMI panel.
  • HMI display panel or also short HMI panel.
  • HMI devices e.g. "Operator Panels”, often referred to as “operator panels” or “OPs” for short, and referred to as HMI devices or associated programming devices used industrial personal computer IPC.
  • HMI devices take over because of their special functionality, e.g. In a networked automation system, functions that can generally be regarded as specification and postprocessing of data of the technical equipment to be controlled. This feature is called “Supervisor Control and Data Acquisition” (SCADA). For this purpose, a special software is executed by an HMI device.
  • SCADA Supervisor Control and Data Acquisition
  • HMI devices e.g. interactive process images of the technical equipment to be operated visualized and operated, but also projected and generated.
  • a selective display of reactions of the technical equipment is possible on the one hand, mostly in the form of measured values and messages.
  • plant-specific configurations can also be possible with an HMI device, e.g. the configuration of interactive process images.
  • a data processing unit for example an HMI device, in particular an HMI display panel, is generally composed of a control unit, for example a printed circuit board, and a display unit, for example a display.
  • the display is connected to the printed circuit board via a ribbon cable, also called foil cable.
  • the display, especially the LCD display, of the HMI device is connected via the ribbon cable driven.
  • the display has, for example, an integrated display controller with integrated image memory. This image memory is updated with a desired change of the image content. Data from the CPU to the display controller need only be transmitted if the image content of the display, in particular LCD displays, is to be changed. With constant image content, the data as well as any control signals may be static.
  • the printed circuit board has a central processing unit (CPU) and other components, for example a RAM memory, which are connected to a data bus, for example a CPU address and data bus.
  • CPU central processing unit
  • data bus for example a CPU address and data bus.
  • the components of the printed circuit board are controlled by the CPU or data is exchanged via this data bus.
  • This data traffic constantly signal edges are connected to the lines, which cause a corresponding noise emission.
  • the display controller is usually connected directly to the CPU address and data bus via the ribbon cable.
  • the show US 2001/0050659 A1 and the US Pat. No. 6,510,525 B1 a data processing unit similar to that of an HMI device.
  • the cable, in particular ribbon cable usually involves a relatively long cable, which can cover several centimeters, depending on the design and cable installation, there may be strong but at least permanent interference emissions.
  • Object of the present invention is to provide a data processing unit, such as HMI device, in which the control of the display unit, such as display, by the control unit, such as printed circuit board, is improved.
  • the display unit for example the display, in particular the display controller
  • the command unit for example CPU
  • the data transmission device consists, for example, of a CPU address and data bus and a connected ribbon cable , is interrupted. Data or signals which are transmitted via the data bus are therefore not automatically applied to the display controller because the decoupling unit can be activated or deactivated.
  • the data processing unit is provided for data transmission between the command unit and the display unit when the decoupling unit is activated.
  • the command unit and the display unit are physically decoupled when the decoupling unit is deactivated. For this purpose, the decoupling unit assumes a high-impedance state.
  • the decoupling unit ensures that signals or data transmitted via the data bus are only transmitted to the display unit, for example display controllers, when the decoupling unit is activated, ie. only if the data or signals are also provided for the display.
  • the decoupling unit remains deactivated, ie in the high-resistance state, ie. the data traffic on the CPU address and data bus remains invisible to the display controller since in these cases there is no physical connection between the command unit, for example the CPU, and the display unit, for example the display, in particular the display controller. As a result, no interference radiation is generated on the ribbon cable in these cases.
  • the decoupling unit has means which effect a self-activation of the decoupling unit in a transmission of data which are intended for the display unit, and / or cause deactivation of the decoupling unit when the data transmission to the display unit has ended.
  • This has the advantage that this does not have to be controlled externally, for example, but is automatic.
  • the decoupling unit is a driver module.
  • the decoupling unit has at least one resistor, wherein the resistor is a pull-up or a pull-down resistor. Due to the combination with such resistors, the edge steepness in the activated state is lowered during the signal or data transmission to the display unit. This results in a lower noise radiation on the ribbon cable.
  • Driver chips are very inexpensive and can be easily combined with resistors, in particular pull-up or pull-down resistors, so that conventional data processing units, For example, HMI devices can be retrofitted very easily and inexpensively.
  • Noise emissions or interference radiation via the ribbon cable therefore only occur in the direct data or signal transmission to the display unit, wherein the noise emissions is minimized by the combination of the driver module with pull-up or pull-down resistors beyond. This also results in a lower dispersion of the emission values for the individual HMI devices of a series.
  • the CPU data address bus experiences less capacitive loading through the LCD display and the ribbon cable. Cost-intensive shielding measures of the ribbon cables, for example, by ferrites, can be completely dispensed with in the inventive arrangement. Due to the inventively lower noise radiation on the ribbon cable between the LCD display and, for example, printed circuit board, there are also further cost advantages due to shorter development times that would otherwise be incurred in reducing the noise emission.
  • the data processing unit is an HMI device, which is also provided for use in an automation system. It can be used particularly advantageously for operating and monitoring of or in industrial installations, in particular automation installations.
  • FIG. 1 shows a schematic representation of a known data processing unit 1, for example, HMI device, in particular HMI display panel.
  • HMI device 1 consists of a control unit 5, for example, printed circuit board, and a display unit 2, for example a display, in particular an LCD display, via a data transmission device 4, 4a, for example consisting of a CPU address and data bus and a connected ribbon cables are interconnected.
  • the display 2 in this case has an integrated display controller 2a, which evaluates and converts control signals or data that are transmitted by the printed circuit board 5.
  • the display 2, in particular LCD display, of the HMI device 1 is thus called via the ribbon cable 4 a, or also called film line.
  • the printed circuit board 5 has a command unit 3, for example CPU (Central Processing Unit), and further components 8a, 8b, 8c, for example RAM memory, etc., which are connected to a data bus 4, for example a CPU address and data bus , Via the data bus 4, the components 8a, 8b, 8c, the printed circuit board 5 are controlled by the CPU 3 or exchanged data. Thus, there is constant traffic on the data bus 4.
  • a command unit 3 for example CPU (Central Processing Unit)
  • components 8a, 8b, 8c for example RAM memory, etc.
  • the data bus 4 is connected directly to the ribbon cable 4a and this with the display controller 2a directly.
  • the ribbon cable 4 a all signals which are transmitted via the data bus 4 are then also present on the display 2 if the signals or data are not available for the display. Controller 2a and the display 2, but for example, for the components 8a, 8b, 8c, are determined.
  • the constant traffic is also on the display controller 2a. With this traffic, a constant change of signal edges is connected to the lines, which cause a corresponding noise radiation 9. Since it is the ribbon cable 4 a usually a relatively long line, which may include several centimeters, is, depending on the design and cable laying to possibly strong, but at least permanent noise emissions. 9
  • FIG. 2 shows an exemplary comparison of the data traffic on the data bus 4 and the ribbon cable 4a of the known HMI device 1.
  • the diamonds of the respective data traffic 11, 12 symbolize the data, or signals, such as control signals via the data bus 4 and the ribbon cable 4a are transmitted.
  • the numbers in the diamonds of the respective traffic 11, 12 symbolize the respective recipients, according to the names from the FIG. 1 , This shows that the data traffic 11 on the data bus 4 is identical to the data traffic 12, which is applied via the ribbon cable 4 a to the display controller 2 a of the display 2.
  • FIG. 3 shows a schematic representation of an HMI device according to the invention 1.
  • a decoupling unit 6, for example a driver module is installed between the data bus 4 and the ribbon cable 4a, so that the direct connection between the display 2, in particular the display controller 2a, and the CPU 3 is interrupted. Data or signals which are transmitted via the data bus 4 are thus not automatically applied to the display controller 2a.
  • the driver module 6 is both activated and deactivated. According to the invention, data transmission to the display controller 2 a, for example from the CPU 3, is possible only in the activated state of the driver module 6. In the deactivated state of the driver module 6, CPU 3 and display 2 are physically decoupled. For this purpose, the driver module 6 must be able to be switched to a high-impedance state.
  • the driver module 6 activates itself in the case of a transmission of data intended for the display controller 2a. If the data transmission to the display controller 2a has ended, the driver module automatically switches itself back into the deactivated state. An external control is not necessary.
  • the control signals for activating or deactivating the driver module 6 can of course also be transmitted from the CPU 3 via the data bus 4 to the driver module 6.
  • driver module 6 with a resistor 7, for example, a pull-up or a pull-down resistor, coupled.
  • a resistor 7 for example, a pull-up or a pull-down resistor
  • the edge steepness in the signal or data transmission to the display controller is lowered during the transition from the activated state to the deactivated state of the driver component 6.
  • Driver chips 6 are very inexpensive and can be easily combined with resistors 7, in particular pull-up or pull-down resistors, so that conventional data processing units 1, for example HMI devices, can be retrofitted very easily and inexpensively.
  • Noise emissions or interference radiation via the ribbon cable 4 a thus only exist in the case of direct data or signal transmission to the display controller 2 a or the display 2, in which case the noise emissions due to the combination of the driver module 6 with pull-up or Pull-down resistors 7 is minimized. This also results in a lower dispersion of the emission values for the individual HMI devices of a production series.
  • the data bus 4 experiences a lower capacitive load through the display 2 and the ribbon cable 4a.
  • Cost-intensive shielding measures of the ribbon cable 4a for example, by ferrites, can be completely dispensed with in the inventive arrangement. Due to the inventively lower interference radiation 9 on the ribbon cable 4 a between the display 2, in particular LCD display, and printed circuit board 5, there are also further cost advantages due to shorter development times, which would otherwise be incurred in reducing the noise emission 9 by constructive measures.
  • the HMI device 1 according to the invention can be used for operating and monitoring of or in industrial plants, in particular automation plants.
  • FIG. 4 shows an exemplary comparison of the data traffic on the data bus 4 and the ribbon cable 4a of the HMI device according to the invention 1.
  • the diamonds of the respective data traffic 11, 12 symbolize according to FIG. 2 the data or signals, for example control signals, which are transmitted via the data bus 4 or the ribbon cable 4 a.
  • the numbers in the diamonds of the respective data traffic 13, 14 again symbolize the respective recipients, according to the names from the FIG. 1 , This shows that the data traffic 14, which rests on the display controller 2a of the display 2 via the ribbon cable 4a, in comparison to the data traffic 13 which rests on the data bus 4, by the inventive arrangement on the transmission of data to the display controller 2a is limited. All other data transfers are only on the data bus 4.
  • the present invention relates to a data processing unit 1, for example HMI device, with a decoupling unit 6, for example a driver module.
  • the HMI device 1 consists of a control unit 5, for example, printed circuit board, and a display unit 2, for example display, which are connected to each other via a ribbon cable 4 a.
  • the driver module 6 according to the invention ensures that interference emissions 9 which occur during data transmission between the printed circuit board 5 and the display 2 on the ribbon cable 4 a are minimized.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Claims (9)

  1. Unité ( 1 ) de traitement de données ayant au moins une unité ( 2 ) d'affichage et une unité ( 3 ) d'instruction, l'unité ( 3 ) d'instruction et l'unité ( 2) d'affichage étant reliées entre elles au moyen d'un dispositif ( 4, 4a ) de transmission de données pour la transmission de données,
    dans laquelle l'unité (2) d'affichage a un display-controller ( 2a ),
    dans laquelle le dispositif (4, 4a) de transmission de données a un bus ( 4 ) de données et un câble ( 4a ) à ruban plat,
    dans laquelle le display-controller ( 2a ) est en liaison avec le bus ( 4 ) de données par le câble ( 4a ) à ruban plat, caractérisée en ce qu'une unité ( 6 ) de découplage est montée entre le bus ( 4 ) de données et le câble ( 4a ) à ruban plat, dans laquelle l'unité ( 6 ) de découplage peut être activée ou peut être désactivée,
    dans laquelle, lorsque l'unité ( 6 ) de découplage est activée, une transmission de données est prévue entre l'unité ( 3 ) d'instruction et l'unité ( 2 ) d'affichage,
    dans laquelle l'unité ( 3 ) d'instruction et l'unité ( 2 ) d'affichage sont découplées physiquement, lorsque l'unité ( 6 ) de découplage est désactivée, et l'unité (6) de découplage a des moyens, qui provoquent une autoactivation de l'unité ( 6 ) de découplage, lors d'une transmission de données qui sont destinées à l'unité ( 2 ) d'affichage, et/ou une désactivation de l'unité ( 6 ) de découplage, lorsque la transmission de données à l'unité (2) d'affichage est terminée.
  2. Unité de traitement de données suivant la revendication 1,
    caractérisée
    en ce que l'unité ( 6 ) de découplage peut prendre un état très ohmique.
  3. Unité de traitement de données suivant l'une des revendications précédentes,
    caractérisée
    en ce que l'unité ( 6 ) de découplage est un module d'attaque.
  4. Unité de traitement de données suivant l'une des revendications précédentes,
    caractérisée
    en ce que l'unité ( 6 ) de découplage a au moins une résistance ( 7 ).
  5. Unité de traitement de données suivant la revendication 4,
    caractérisée
    en ce que la résistance ( 7 ) est une résistance pull-up ou une résistance pull-down.
  6. Unité de traitement de données suivant l'une des revendications précédentes,
    caractérisée
    en ce que l'unité (1) de traitement de données est un appareil HMI.
  7. Unité de traitement de données suivant l'une des revendications précédentes,
    caractérisée
    en ce que l'unité ( 2 ) d'affichage est un LCD-display.
  8. Unité de traitement de données suivant l'une des revendications précédentes,
    caractérisée
    en ce que l'unité ( 1 ) de traitement de données est prévue pour être utilisée dans un système d'automatisation.
  9. Système d'automatisation ayant au moins une unité ( 1 ) de traitement de données suivant l'une des revendications 1 à 8.
EP04022728.2A 2003-09-26 2004-09-23 Unité de traitement de données avec une unité de découplage Expired - Lifetime EP1519257B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20314961U 2003-09-26
DE10344864 2003-09-26
DE10344864A DE10344864A1 (de) 2003-09-26 2003-09-26 Datenverarbeitungseinheit mit Entkopplungseinheit
DE20314961U DE20314961U1 (de) 2003-09-26 2003-09-26 Datenverarbeitungseinheit mit Entkopplungseinheit

Publications (3)

Publication Number Publication Date
EP1519257A2 EP1519257A2 (fr) 2005-03-30
EP1519257A3 EP1519257A3 (fr) 2009-03-04
EP1519257B1 true EP1519257B1 (fr) 2013-04-24

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Application Number Title Priority Date Filing Date
EP04022728.2A Expired - Lifetime EP1519257B1 (fr) 2003-09-26 2004-09-23 Unité de traitement de données avec une unité de découplage

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Country Link
EP (1) EP1519257B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202453678U (zh) * 2012-02-13 2012-09-26 施耐德电器工业公司 一种人机界面装置和包含其的控制柜

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152761A (en) * 1983-12-15 1985-08-07 Citizen Watch Co Ltd A liquid crystal display device
US6237056B1 (en) * 2000-07-14 2001-05-22 Videon, Inc. Apparatus and method for high speed board-to board ribbon cable data transfer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510525B1 (en) * 1999-04-26 2003-01-21 Mediaq, Inc. Method and apparatus to power up an integrated device from a low power state
JP2002072990A (ja) * 2000-06-12 2002-03-12 Sharp Corp 画像表示システム及び表示装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152761A (en) * 1983-12-15 1985-08-07 Citizen Watch Co Ltd A liquid crystal display device
US6237056B1 (en) * 2000-07-14 2001-05-22 Videon, Inc. Apparatus and method for high speed board-to board ribbon cable data transfer

Also Published As

Publication number Publication date
EP1519257A3 (fr) 2009-03-04
EP1519257A2 (fr) 2005-03-30

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