EP0728581B1 - Bus system for a printing machine - Google Patents
Bus system for a printing machine Download PDFInfo
- Publication number
- EP0728581B1 EP0728581B1 EP96101643A EP96101643A EP0728581B1 EP 0728581 B1 EP0728581 B1 EP 0728581B1 EP 96101643 A EP96101643 A EP 96101643A EP 96101643 A EP96101643 A EP 96101643A EP 0728581 B1 EP0728581 B1 EP 0728581B1
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- EP
- European Patent Office
- Prior art keywords
- bus
- stations
- connection
- station
- transmitting
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0009—Central control units
Definitions
- the invention relates to a bus system for a printing press according to the preamble of Claim 1.
- the lines representing the bus system are used for installation and service work often charged in an improper manner. So it can happen that the cable an optical waveguide or a coax conductor is bent or bent too much. It can also be done by pulling cables, especially through narrow, sharp-edged openings damage to the insulation or protective sheathing. Such Damage options are also exposed to twisted pair wire buses.
- Coax or twisted two-wire bus Interference fields to reduce the transmission capacity, if not to the total transmission failure of the respective bus system to lead.
- Such disturbances also represent a severe impairment of the Bus system, which is particularly the case when lines are used in particular Service lines are not routed properly and in close proximity to others Line systems arrive. Aging in components, especially with optoelectronic ones Signal transmission are a potential source of errors.
- EP-A 0 270 871 describes a system for input and / or output of signals known a digital control system. Individual peripheral units are over one Bus system, output register and output stage connected to a control unit. The content of the output register and the output signals of the output stages are separated can be queried.
- the object of the present invention is therefore a bus system according to the preamble of claim 1 to expand in such a way that, with a simple design, the above Disadvantages avoided and changes in the transmission capacity of the bus system can be recognized as early as possible.
- bus or The bus system is also used for transmission lines in which data is transmitted in each case between neighboring stations in the manner of a loop.
- At least one of those coupled to the bus system Stations has a bus coupler, which from time to time or each time it is switched on of the bus system (power-on) a signal sequence for the purpose of establishing a connection with the or the other stations on the bus system, this signal output by the Bus coupler takes place in such a way that at least one physical quantity of the bus system underlying line protocol outside of an intended framework lies.
- This can be done in particular with optical fibers in such a way that e.g. a Master station for a power-on, i.e. switching on the printing press along with Control, via the bus system with the other stations a connection with less Tried to build up transmit power.
- one Station repeated this connection establishment with successively increasing transmission power. Only when all the addressed stations establish the connection properly acknowledge - the acknowledgment is expediently carried out on the line protocol provided transmission power level -, the bus coupler switches the intended Station to the intended transmission power and the normal one takes place if there is no error Broadcast mode. By gradually increasing the transmission power when trying connections to the other stations it is possible to determine which minimum Transmitting power the bus line requires proper data transmission just barely allow. It is therefore the difference between the normal transmission power can be formed in accordance with the line protocol and the minimum transmission power determined in this way, from which a measure of the system reserve can be derived.
- bus coupler designed according to the invention this can be determined and can be used, for example, to display a corresponding warning or even to trigger a system crash by locking the press drive can be used against tarnishing.
- the principle according to the invention is not only limited for use in bus systems, which have fiber optic cables or optical fibers. Nor does it have to Transmit power with which a station tries to establish a connection to other stations, can be varied, but there can also be other physical quantities in the line protocol used differently.
- potential Bus error sources can also be determined by establishing the connection with a different Transmission frequency, with a bandwidth other than intended, under conscious Addition of secondary or interference frequencies and the like can be carried out.
- the criterion for determining the system reserve is the variation of a physical transmission size, So at what value the value of the varied physical quantity is a proper one Establishing a connection between the stations.
- each station has a bus coupler according to the invention Transmission lines between neighboring stations.
- Fig. 1 shows the printing units of a sheet-fed offset printing machine.
- the individual printing units stations 1.1 to 1.5 designed as computers are assigned, which have a common and formed as an optical fiber bus 2 in signal connection with each other stand.
- a station 1.1 like the other stations 1.2 to 1.5 (not shown there), has one Bus coupler 3, which consists of a transmitting 3.1 and receiving part 3.2. About the send 3.1 and receiving part 3.2, the transmission and reception of signals of the bus takes place 2 to and from the other stations 1.2 to 1.5.
- the transmitting part 3.1 of the bus coupler 3 of the station 1.1 is with a control and Evaluation unit 4 in operative connection, so that on the bus 2 via the optoelectronics of the bus coupler 3 transmit signals with different signal power can be emitted.
- transmitting part 3.1 has a light transmitter that can be controlled in terms of light output.
- Control and evaluation unit 4 determines the power with which the light transmitter feeds the optical signals into the optical fiber.
- FIG. 2 shows a time diagram according to which the control and evaluation unit 4 uses the Transmitting part 3.1 of the bus coupler 3, the transmission power for establishing a connection with the other stations 1.2 to 1.5 gradually increased.
- the time diagram in FIG. 2 also includes Pn marked the transmission power of normal signal exchange.
- the transmitting part 3.1 of the bus coupler 3 sends a total of three times signals for establishing a connection with a transmission power P, which is smaller than that normally provided Transmission power Pn.
- Under the signal delivery to establish a connection with the remaining stations 1.2 to 1.5 is one in the optical fiber of bus 2 as a serial bus understand certain bit sequence.
- the increase in transmission power P is from Signal delivery to signal delivery step by step up to the intended transmission power value Pn increased.
- the time diagram of FIG. 3 shown under the time diagram of FIG. 2 shows the following: that only at a time T1 one of the stations 1.1 to 1.5 the signal sequence recognized for the purpose of establishing a connection and correspondingly with full transmission power to the transmitting station 1.1 has returned.
- Control and evaluation unit 4 can thus generate a response signal A, which is here To be understood as an example, changes from 0 to 1 when one or more of the stations 1.1 to 1.5 the correct connection establishment has been acknowledged.
- the stations 1.2 to 1.5 do not have to acknowledge the correct connection establishment, that with reduced Transmit power sent signals back to station 1.1, but it is also possible that the confirmation of the correct connection establishment by a predetermined signal or bit sequence takes place.
- control and Evaluation unit 4 Since the control and Evaluation unit 4 has gradually increased the transmission power P and further by the control and Evaluation unit 4 can be determined via the receiving part 3.2 of the bus coupler 3 which point in time at which transmission power P from one of the stations 1.2 to 1.5 the correct connection establishment has been acknowledged, it can now be determined how big the difference between the normally provided transmission power Pn and the minimum required Is transmission power for proper data traffic. From this difference in performance a quality value can then be formed, which shows how large the power reserve of the Bus system is. If this previously defined power difference falls below a predetermined one Limit value, it can be provided to display a warning and / or to lock the drive of the printing machine against starting.
- the invention was based on an actual bus or bus system explained. Only one station 1.1 has the bus coupler designed according to the invention 3 on. If the bus is designed as a loop, each of the existing stations points 1.1 - 1.n the bus coupler 3 according to the invention, so that a check of each Transmission lines between two neighboring stations. The one previously described The process is the same.
Landscapes
- Small-Scale Networks (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Computer And Data Communications (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
- Optical Communication System (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Rotary Presses (AREA)
Abstract
Description
Die Erfindung betrifft ein Bussystem für eine Druckmaschine gemäß dem Oberbegriff von
Anspruch 1.The invention relates to a bus system for a printing press according to the preamble of
Bei Bogenoffsetdruckmaschinen ist es, wie schon seit langem bei großen Rollenrotationsdruckmaschinen bekannt, in den einzelnen Einheiten Stationen in Form vom Rechnern anzuordnen und diese mittels einem Bus miteinander zu verbinden. So ist beispielsweise aus der EP 0 543 281 A1 eine Steuerung für Rotationsdruckmaschinen bekannt, bei welcher jedem Anlagenteil ein oder mehrere Rechner-Einheiten zugeordnet sind und diese Einheiten über einen Koax- bzw. verdrillten Zweidrahtleiter-Bus miteinander verbunden sind. So ist es möglich, daß beispielsweise von einer Master-Station, über welche die gesamte Steuerung der Druckmaschine erfolgt, Kommandos in Form von Bussignalen an die einzelnen Rechner-Einheiten in den jeweiligen Aggregaten gesendet werden. Die einzelnen Einheiten, welche beispielsweise mit Sensoren oder sonstigen Erfassungseinrichtungen verbunden sind, können ebenfalls Signale an die Master-Station zurücksenden. Ebenfalls kann vorgesehen sein, daß keiner der Rechner-Einheiten einen Master darstellt, sondern daß sämtliche Rechner-Einheiten autark und gleichberechtigt nötige Information in Form von Signalen senden und empfangen können.With sheetfed offset presses it is like it has been with large web-fed rotary presses for a long time known to arrange stations in the form of computers in the individual units and connect them to each other using a bus. For example, is out a control for rotary printing presses is known from EP 0 543 281 A1, in which each plant part is assigned one or more computer units and these units are connected to each other via a coax or twisted two-wire bus. So it is possible, for example, from a master station via which the entire Control of the printing press takes place, commands in the form of bus signals to the individual Computer units are sent in the respective aggregates. The individual units, which, for example, is connected to sensors or other detection devices signals can also be sent back to the master station. Can also be provided that none of the computer units represents a master, but that all computer units self-sufficient and equally necessary information in the form of Can send and receive signals.
Aus der DE-Z der Polygraph, 9/86, Seite 1103 und 1104 ist es ferner bekannt, die in den einzelnen Druckwerken angeordneten Mikroprozessoren über ein Verbundnetzt aus Glasfaserkabeln untereinander und mit dem Fernsteuerpult der Druckmaschine zu verbinden. Der Vorteil der Glasfasertechnik als Bussystem liegt dabei darin, daß eine größtmögliche Datenübertragungsrate bei völliger Immunität gegenüber elektrischen Störeinflüssen gegeben ist.From DE-Z of the Polygraph, 9/86, page 1103 and 1104 it is also known that in the microprocessors arranged in individual printing units via a composite network of fiber optic cables to connect with each other and with the remote control panel of the printing press. The advantage of fiber optic technology as a bus system is that it is the largest possible Data transfer rate given complete immunity to electrical interference is.
Bei Installations- und insbesondere Servicearbeiten kommt es aber immer wieder vor, daß die Verbindungen der einzelnen Stationen mit dem Bus gelöst bzw. wieder hergestellt werden müssen. Dabei kann es passieren, daß elektrische und/oder optische Verbindungen (Steckverbindungen) nicht ordnungsgemäß hergestellt werden. Bei elektrischen Steckverbindungen kann beispielsweise ein nicht vollständiges Aufstecken oder das Einbringen von Verunreinigungen in den Steckverbinder dazu führen, daß die derartig mit dem Bus verbundene Station keine ordnungsgemäße Signalankopplung an den Bus erfährt. Für eine bestimmte Zeit kann dabei trotzdem noch ein Signaltransfer zwischen Bus und jeweiliger Station stattfinden, es liegt dann aber eine potentielle Fehlerquelle vor, welche auch durch übliche und bekannte Bustests mittels Signalroutinen und dgl. zu nicht vorhersehbaren plötzlichen Ausfällen führen kann.During installation and in particular service work, it always happens that the connections between the individual stations can be released or restored by bus have to. It can happen that electrical and / or optical connections (Plug connections) are not properly established. With electrical plug connections can, for example, an incomplete insertion or the introduction of Contamination in the connector leads to the fact that it is connected to the bus Station does not experience proper signal coupling to the bus. For a specific one Time can still be a signal transfer between the bus and the respective station take place, but then there is a potential source of error, which can also be caused by usual and known bus tests using signal routines and the like for unpredictable sudden Failures.
Bei Installations- und Servicearbeiten werden die das Bussystem darstellenden Leitungen oftmals in nicht vorschriftsgemäßer Weise belastet. So kann es vorkommen, daß das Kabel eines Lichtwellenleiters oder eines Koax-Leiters zu stark gekrümmt bzw. geknickt wird. Auch kann es durch Ziehen von Kabeln, insbesondere durch enge, scharfkantige Öffnungen zu einer Beschädigung der Isolations- bzw. Schutzummantelungen kommen. Derartigen Schadensmöglichkeiten sind dabei auch verdrillte Zweitdrahtleiterbusse ausgesetzt.The lines representing the bus system are used for installation and service work often charged in an improper manner. So it can happen that the cable an optical waveguide or a coax conductor is bent or bent too much. It can also be done by pulling cables, especially through narrow, sharp-edged openings damage to the insulation or protective sheathing. Such Damage options are also exposed to twisted pair wire buses.
Die oben beschriebenen Beschädigungs- oder Fehlbehandlungsmöglichkeiten stellen ebenfalls eine potentielle Fehlerquelle dar. Auch hier ist bei bekannten Bussytemen ein plötzlicher Signalausfall nicht vorhersehbar.The damage or mishandling options described above also pose is a potential source of error. Again, with known bus systems there is a sudden one Signal loss not predictable.
Neben unsachgemäßen Handhabungen an dem Busleitungssystem können ferner gerade bei Koax- bzw. verdrillten Zweidrahtleiterbussen Störfelder zu einer Herabsetzung der Übertragungskapazität, wenn nicht gar zum totalen Übertragungsausfall des jeweiligen Bussystems führen. Hier seien beispielsweise magnetische oder kapazitive Einkopplungen von Starkstromleitungen, Überkopplung benachbarter Leitungen und Ströme in Abschirmungsleitungen genannt. Derartige Störungen stellen ebenfalls eine starke Beeinträchtigung des Bussystemes dar, wozu es insbesondere dann kommt, wenn Leitungen insbesondere bei Serviceleitungen nicht ordnungsgemäß verlegt werden und in zu enge Nachbarschaft mit anderen Leitungssystemen gelangen. Auch Alterungen in Bauteilen, insbesondere bei optoelektronischer Signalübertragung, stellen eine potentielle Fehlerquelle dar.In addition to improper handling of the bus line system, it is also possible for Coax or twisted two-wire bus Interference fields to reduce the transmission capacity, if not to the total transmission failure of the respective bus system to lead. Here, for example, magnetic or capacitive couplings from Power lines, coupling of neighboring lines and currents in shielding lines called. Such disturbances also represent a severe impairment of the Bus system, which is particularly the case when lines are used in particular Service lines are not routed properly and in close proximity to others Line systems arrive. Aging in components, especially with optoelectronic ones Signal transmission are a potential source of errors.
Bei Glasfaserkabeln und Lichtwellenleitern ist es bekannt, deren Funktionssicherheit hinsichtlich der Signalübertragung über die Messung der optischen Dämpfung zu erfassen. In the case of fiber optic cables and optical fibers, it is known that they are functionally reliable to detect the signal transmission by measuring the optical attenuation.
Dazu ist es aber nötig, die zusammenhängenden Enden in der Leitung von der jeweiligen Station zu lösen und an ein spezielles Meß- und Diagnosegerät anzuschließen. Bei dem nachfolgenden Anschließen der zusammenhängenden Enden einer Leitung an die Einheiten kann es dabei wegen der nötigen Handhabungen ebenfalls zu potentiellen Fehlerquellen führen, wenn insbesondere die optische Ankoppelung zwischen Leiterende und der dazugehörigen Optoelektronik nicht vollständig und einwandfrei hergestellt wird. Weist die Optoelektronik einer Station dabei mehrere und auch freie Eingänge auf, so ist ferner auch ein Fehlstecken bei der Wiederherstellung der Lichtwellenleiterverbindung möglich. To do this, however, it is necessary to separate the connected ends in the line from the respective Solve station and connect to a special measuring and diagnostic device. In which subsequently connecting the contiguous ends of a line to the units There may also be potential sources of error due to the necessary handling lead, in particular if the optical coupling between the end of the conductor and the associated one Optoelectronics is not completely and properly manufactured. Assigns the optoelectronics One station has several and also free inputs, so there is also one Incorrect insertion possible when restoring the fiber optic connection.
Aus der EP-A 0 270 871 ist ein System zur Ein- und/oder Ausgabe von Signalen eines digitalen Steuersystems bekannt. Einzelne Peripherie-Einheiten sind über ein Bussystem, Ausgangsregister und Endstufe an eine Steuereinheit angeschlossen. Der Inhalt der Ausgangsregister und die Ausgangssignale der Endstufen sind getrennt abfragbar. EP-A 0 270 871 describes a system for input and / or output of signals known a digital control system. Individual peripheral units are over one Bus system, output register and output stage connected to a control unit. The content of the output register and the output signals of the output stages are separated can be queried.
Aufgabe der vorliegenden Erfindung ist es daher, ein Bussystem gemäß dem Oberbegriff
von Anspruch 1 derartig zu erweitern, so daß bei einfacher Ausgestaltung die oben genannten
Nachteile vermieden und Veränderungen in der Übertragungskapazität des Bussystems
frühestmöglich erkannt werden können.The object of the present invention is therefore a bus system according to the preamble
of
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1. Weiterbildungen
der Erfindung ergeben sich aus den Unteransprüchen. Der Begriff Bus bzw.
Bussystem wird hierbei auch für Übertragungsleitungen verwendet, bei denen eine Datenübertragung
jeweils zwischen benachbarten Stationen nach Art einer Loop erfolgt.This problem is solved by the characterizing features of
Erfindungsgemäß ist vorgesehen, daß wenigstens eine der an das Bussystem angekoppelten Stationen einen Buskoppler aufweist, der von Zeit zu Zeit bzw. bei jedem Einschalten des Bussystems (Power-On) eine Signalfolge zwecks Aufbau einer Verbindung mit der oder den anderen Stationen auf das Bussystem sendet, wobei diese Signalabgabe durch den Buskoppler in einer Weise erfolgt, daß wenigstens eine physikalische Größe des dem Bussystem zugrunde liegenden Leitungsprotokolls außerhalb eines vorgesehenen Rahmens liegt. Dies kann insbesondere bei Lichtwellenleitern in einer Weise erfolgen, daß z.B. eine Master-Station bei einem Power-On, also dem Einschalten der Druckmaschine nebst Steuerung, über das Bussystem mit den anderen Stationen eine Verbindung mit geringer Sendeleistung aufzubauen versucht. Dabei kann insbesondere vorgesehen sein, daß die eine Station diese Verbindungsaufnahme mit sukzessiv steigender Sendeleistung wiederholt. Erst wenn sämtliche angesprochenen Stationen den Verbindungsaufbau ordnungsgemäß quittieren - die Quittierung erfolgt in zweckmäßiger Weise auf dem gemäß Leitungsprotokoll vorgesehenem Sendeleistungsniveau -, schaltet der Buskoppler der vorgesehenen Station auf die vorgesehene Sendeleistung um und es erfolgt im fehlerfreien Fall der normale Sendebetrieb. Durch das sukzessive Erhöhen der Sendeleistung beim Versuch Verbindungen zu den übrigen Stationen aufzubauen ist es möglich, festzustellen, welche minimale Sendeleistung die Busleitung benötigt um eine ordnungsgemäße Datenübertragung gerade noch zu ermöglichen. Es ist somit die Differenz zwischen der normalen Sendeleistung gemäß Leitungsprotokoll und der derartig ermittelten Minimalsendeleistung bildbar, woraus ein Maß für die Systemreserve abgeleitet werden kann.According to the invention it is provided that at least one of those coupled to the bus system Stations has a bus coupler, which from time to time or each time it is switched on of the bus system (power-on) a signal sequence for the purpose of establishing a connection with the or the other stations on the bus system, this signal output by the Bus coupler takes place in such a way that at least one physical quantity of the bus system underlying line protocol outside of an intended framework lies. This can be done in particular with optical fibers in such a way that e.g. a Master station for a power-on, i.e. switching on the printing press along with Control, via the bus system with the other stations a connection with less Tried to build up transmit power. It can in particular be provided that one Station repeated this connection establishment with successively increasing transmission power. Only when all the addressed stations establish the connection properly acknowledge - the acknowledgment is expediently carried out on the line protocol provided transmission power level -, the bus coupler switches the intended Station to the intended transmission power and the normal one takes place if there is no error Broadcast mode. By gradually increasing the transmission power when trying connections to the other stations it is possible to determine which minimum Transmitting power the bus line requires proper data transmission just barely allow. It is therefore the difference between the normal transmission power can be formed in accordance with the line protocol and the minimum transmission power determined in this way, from which a measure of the system reserve can be derived.
Eine wie eingangs beschrieben zustandegekommene Fehlerquelle wird aber in der Regel bewirken, daß die Differenz zwischen der normalerweise vorgesehenen Sendeleistung und der gerade noch zum Zustandekommen eines Verbindungsaufbaues minimal benötigten Sendeleistung deutlich geringer wird. Durch den erfindungsgemäß gestalteten Buskoppler ist dies feststellbar und kann beispielsweise zur Anzeige eines entsprechenden Warnhinweises oder gar zum Auslösen eines Systemabbruchs mit einem Sperren des Druckmaschinenantriebs gegen ein Anlaufen genutzt werden.However, a source of error as described at the beginning is usually cause the difference between the normally envisaged transmit power and who just needed minimally to establish a connection Transmission power becomes significantly lower. Through the bus coupler designed according to the invention this can be determined and can be used, for example, to display a corresponding warning or even to trigger a system crash by locking the press drive can be used against tarnishing.
Das erfindungsgemäße Prinzip ist dabei nicht nur zur Verwendung bei Bussystemen beschränkt, welche Glasfaserkabel bzw. Lichtwellenleiter aufweisen. Auch muß nicht die Sendeleistung, mit der eine Station den Verbindungsaufbau zu anderen Stationen versucht, variiert werden, sondern es können auch andere physikalische Größen im vom Leitungsprotokoll abweichender Weise verwendet werden. Erfindungsgemäß können potentielle Busfehlerquellen auch dadurch ermittelt werden, indem der Verbindungsaufbau mit abweichender Sendefrequenz, mit einer anderen als vorgesehenen Bandbreite, unter bewußter Hinzumischung von Neben- oder Störfrequenzen und dgl. durchgeführt werden. Auch hier ist das Kriterium zur Ermittlung der Systemreserve das Variieren einer physikalischen Sendegröße, also bei welchem Wert der Wert der variierten physikalischen Größe ein ordnungsgemäßer Verbindungsaufbau zwischen den Stationen zustande kommt.The principle according to the invention is not only limited for use in bus systems, which have fiber optic cables or optical fibers. Nor does it have to Transmit power with which a station tries to establish a connection to other stations, can be varied, but there can also be other physical quantities in the line protocol used differently. According to the invention, potential Bus error sources can also be determined by establishing the connection with a different Transmission frequency, with a bandwidth other than intended, under conscious Addition of secondary or interference frequencies and the like can be carried out. Here too the criterion for determining the system reserve is the variation of a physical transmission size, So at what value the value of the varied physical quantity is a proper one Establishing a connection between the stations.
Sind die Übertragungsleitungen des Bussystems als sogenante Loop ausgebildet, bei der die Daten von einer Station zu jeweils einer benachbarten Station weitergeleitet werden, so weist jede Station einen erfindungsgemäßen Buskoppler auf Geprüft werden dann die Übertragungsleitungen zwischen benachbarten Stationen. Are the transmission lines of the bus system designed as a loop, in which the data is forwarded from one station to a neighboring station, so each station has a bus coupler according to the invention Transmission lines between neighboring stations.
In einer als Bus im eigentlichen Sinne ausgebildeten Übertragungsleitung reicht es, daß lediglich eine Station einen entsprechend steuerbaren Buskoppler zur Variation wenigstens einer physikalischen Sendegröße aufweist.In a transmission line designed as a bus in the true sense, it is sufficient that only at least one station has a controllable bus coupler for variation has a physical transmission size.
Des weiteren erfolgt die Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnungen. Es zeigt:
- Fig. 1
- prinzipiell ein erfindungsgemäß ausgebildetes Bussystem,
- Fig. 2 + 3
- Zeitdiagramme zur Verdeutlichung des erfindungsgemäßen Wirkprinzips.
- Fig. 1
- in principle a bus system designed according to the invention,
- Fig. 2 + 3
- Time diagrams to illustrate the principle of action according to the invention.
Fig. 1 zeigt die Druckwerke einer Bogenoffsetdruckmaschine. Den einzelnen Druckwerken
sind als Rechner ausgebildete Stationen 1.1 bis 1.5 zugeordnet, welche über einen gemeinsamen
und als Lichtwellenleiter ausgebildeten Bus 2 in Signalverbindung miteinander
stehen.Fig. 1 shows the printing units of a sheet-fed offset printing machine. The individual printing units
stations 1.1 to 1.5 designed as computers are assigned, which have a common
and formed as an
Eine Station 1.1 weist, wie die übrigen Stationen 1.2 bis 1.5 (dort nicht dargestellt), einen
Buskoppler 3 auf, der aus einem Sende- 3.1 und Empfangsteil 3.2 besteht. Über den Sende-3.1
und Empfangsteil 3.2 erfolgt das Senden und Empfangen von Signalen des Busses
2 an und von den übrigen Stationen 1.2 bis 1.5.A station 1.1, like the other stations 1.2 to 1.5 (not shown there), has one
Der Sendeteil 3.1 des Buskopplers 3 der Station 1.1 steht mit einer Steuer- und
Auswerteeinheit
4 in Wirkverbindung, so daß auf dem Bus 2 über die Optoelektronik des Buskopplers
3 Sendesignale mit unterschiedlicher Signalleistung abgegeben werden können. Der
Sendeteil 3.1 weist dazu einen in der Lichtleistung steuerbaren Lichtsender auf. Über die
Steuer- und Auswerteeinheit 4 erfolgt die Festlegung, mit welcher Leistung der Lichtsender
die optischen Signale in den Lichtwellenleiter einspeist.The transmitting part 3.1 of the
Erfindungsgemäß ist nun vorgesehen, daß bei einem Power-On - dazu steht die Steuer-und
Auswerteeinheit 4 mit einer nicht dargestellten Spannungsversorgung der Druckmaschine
in Wirkverbindung - über den Sendeteil 3.1 des Buskopplers 3, gesteuert durch die
Steuer- und Auswerteeinheit 4, ein Signal zur Verbindungsaufnahme mit ein oder mehreren
der übrigen Stationen 1.2 bis 1.5 mit verminderter und danach steigender Sendeleistung
wiederholt abgegeben wird.According to the invention, it is now provided that in the case of a power-on - the control and
Fig. 2 zeigt ein Zeitdiagramm, nach welchem die Steuer- und Auswerteeinheit 4 über den
Sendeteil 3.1 des Buskopplers 3 die Sendeleistung zur Aufnahme einer Verbindung mit den
übrigen Stationen 1.2 bis 1.5 schrittweise erhöht. Im Zeitdiagramm der Fig. 2 ist dabei mit
Pn die Sendeleistung des normalen Signalaustausches gekennzeichnet. In diesem Beispiel
sendet der Sendeteil 3.1 des Buskopplers 3 insgesamt drei mal Signale zur Verbindungsaufnahme
mit einer Sendeleistung P, welche jeweils kleiner ist als die normalerweise vorgesehene
Sendeleistung Pn. Unter der Signalabgabe zum Aufbau einer Verbindung mit den
übrigen Stationen 1.2 bis 1.5 ist bei dem Lichtwellenleiter des Busses 2 als seriellen Bus eine
bestimmte Bit-Folge zu verstehen. Die Erhöhung der Sendeleistung P wird dabei von
Signalabgabe zu Signalabgabe schrittweise bis auf den vorgesehenen Sendeleistungswert
Pn erhöht.FIG. 2 shows a time diagram according to which the control and
Im unter dem Zeitdiagramm der Fig. 2 dargestellten Zeitdiagramm der Fig. 3 ist wiedergegeben,
daß erst zu einem Zeitpunkt T1 einer der Stationen 1.1 bis 1.5 die Signalfolge
zwecks Verbindungsaufbau erkannt und entsprechend mit voller Sendeleistung an die Sendestation
1.1 zurückgeschickt hat. In der mit dem Buskoppler 3 in Wirkverbindung stehenden
Steuer- und Auswerteeinheit 4 ist somit ein Antwort signal A generierbar, welches hier
beispielhaft zu verstehen von 0 auf 1 wechselt, wenn von einer oder mehrerer der Stationen
1.1 bis 1.5 der ordnungsgemäße Verbindungsaufbau quittiert worden ist. Die Stationen
1.2 bis 1.5 müßen zur Quittierung des korrekten Verbindungsaufbaues nicht die mit verminderter
Sendeleistung gesendeten Signale wieder an die Station 1.1 zurücksenden, sondern
es ist auch möglich, daß das Quittieren des korrekten Verbindungsaufbaues durch eine
vorgegebene Signal- bzw. Bit-Folge erfolgt.The time diagram of FIG. 3 shown under the time diagram of FIG. 2 shows the following:
that only at a time T1 one of the stations 1.1 to 1.5 the signal sequence
recognized for the purpose of establishing a connection and correspondingly with full transmission power to the transmitting station
1.1 has returned. In the one in operative connection with the
Da die mit dem Buskoppler 3 der Station 1.1 in Wirkverbindung stehende Steuer- und
Auswerteeinheit 4 schrittweise die Sendeleistung P erhöht hat und ferner durch die Steuer-und
Auswerteeinheit 4 über den Empfangsteil 3.2 des Buskopplers 3 feststellbar ist, zu
welchem Zeitpunkt also bei welcher Sendeleistung P von einer der Stationen 1.2 bis 1.5
der korrekte Verbindungsaufbau quittiert wurde, ist nun feststellbar, wie groß die Differenz
zwischen normalerweise vorgesehenen Sendeleistung Pn und der minimal nötigen
Sendeleistung für einen ordnungsgemäßen Datenverkehr ist. Aus dieser Leistungsdifferenz
ist sodann ein Gütewert bildbar, aus dem hervorgeht, wie groß die Leistungsreserve des
Bussystems ist. Unterschreitet diese zuvorstehend definierte Leistungsdifferenz einen vorgegebenen
Grenzwert, so kann vorgesehen sein, einen Warnhinweis anzuzeigen und/oder
den Antrieb der Druckmaschine gegen ein Anfahren zu sperren.Since the control and
Im obigen Ausführungsbeispiel wurde die Erfindung an einem eigentlichen Bus bzw. Bussystem
erläutert. Lediglich eine Station 1.1 weist den erfindungsgemäß ausgebildeten Buskoppler
3 auf. Ist der Bus als Loop ausgebildet, so weist jede der vorhandenen Stationen
1.1 - 1.n den erfindungsgemäßen Buskoppler 3 auf, so daß jeweils eine Überprüfung der
Übertragungsleitungen zwischen zwei benachbarten Stationen erfolgt. Der zuvor beschriebene
Ablauf ist dabei aber der gleiche. In the above exemplary embodiment, the invention was based on an actual bus or bus system
explained. Only one station 1.1 has the bus coupler designed according to the
- 1.1 - 1.51.1 - 1.5
- Stationstation
- 22nd
- Busbus
- 33rd
- BuskopplerBus coupler
- 3.13.1
- Sendeteil (Buskoppler 3)Transmitting part (Bus Coupler 3)
- 3.23.2
- Empfangsteil (Buskoppler 3)Receiver part (bus coupler 3)
- 44th
- Steuer- und AuswerteeinheitControl and evaluation unit
Claims (4)
- Bus system for a printing press, particularly an offset sheet printing press, in which several stations are connected together via a bus for the purpose of data exchange and for this the individual stations have bus couplers together with transmission portions, characterised in that at least one of the stations (1.1) has a transmission portion (3.1) in the bus coupler (3), wherein the transmission portion (3.1) is constructed for this purpose in a fashion so as to emit signals for the purpose of constructing a connection with the remaining stations (1.2 - 1.5), wherein the value of at least one physical quantity on transmitting these signals varies from that value of the quantity provided for in the connection protocol and that via the transmitting portion (3.1) of the bus coupler (3) the at least one station repeats the signal emission for the purpose of constructing a connection with the remaining stations (1.2 - 1.5) and it can be carried out with stepwise alteration of the value of the physical quantity.
- Bus system according to Claim 1, characterised in that the bus (3) is constructed as an optical waveguide and that via the transmitting part (3.1) of at least one station (1.1), one or several attempts at building up a connection with the remaining stations (1.2 - 1.5) can be carried out with transmission power diminished with respect to the preset transmission power in the connection protocol.
- Bus system according to Claim 1 or 2, characterised in that by means of the transmitting parts (3.1) of at least one station (1.1), the transmitting processes for building up a connection with the remaining stations (1.2 - 1.5) can be carried out on each power on.
- Bus system according to one of the preceding Claims, characterised in that the stations (1.1 - 1.5) are connected with a bus in the form of a loop and each station (1.1 - 1.5) has a transmitting portion (3.1) in the respective bus coupler, by means of which the signals for constructing a connection with in each case a neighbouring station (1.2 - 1.5) can be emitted, wherein the value of at least one physical quantity on transmitting these signals varies from that value of the quantity provided in the connection protocol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19506261A DE19506261A1 (en) | 1995-02-23 | 1995-02-23 | Bus system for a printing press |
| DE19506261 | 1995-02-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0728581A2 EP0728581A2 (en) | 1996-08-28 |
| EP0728581A3 EP0728581A3 (en) | 1997-05-21 |
| EP0728581B1 true EP0728581B1 (en) | 1998-09-02 |
Family
ID=7754807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96101643A Expired - Lifetime EP0728581B1 (en) | 1995-02-23 | 1996-02-06 | Bus system for a printing machine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5730053A (en) |
| EP (1) | EP0728581B1 (en) |
| JP (1) | JP2766242B2 (en) |
| AT (1) | ATE170458T1 (en) |
| DE (2) | DE19506261A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19815185A1 (en) | 1998-04-04 | 1999-10-07 | Roland Man Druckmasch | Control computer for a printing press |
| DE20000919U1 (en) * | 2000-01-20 | 2000-03-09 | Roland Man Druckmasch | Monitoring device for a printing press |
| DE10311284B4 (en) * | 2003-03-14 | 2005-11-24 | Koenig & Bauer Ag | Printing machine with at least two printing units |
| DE10318541A1 (en) * | 2003-04-24 | 2004-11-11 | Koenig & Bauer Ag | Measurement, documentation and monitoring of electrical parameters relating to a print machine by use of a multi-function monitoring module integrated in the machine control unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60124760A (en) * | 1983-12-12 | 1985-07-03 | Mitsubishi Electric Corp | Bus supervisory device |
| DE3642500A1 (en) * | 1986-12-12 | 1988-06-23 | Heidelberger Druckmasch Ag | SYSTEM FOR INPUT AND / OR OUTPUT OF SIGNALS FROM A DIGITAL CONTROL SYSTEM |
| DE3839248A1 (en) * | 1988-11-21 | 1990-05-23 | Roland Man Druckmasch | DECENTRALIZED CONTROL CALCULATOR, IN PARTICULAR WITHIN A ROTATIONAL PRINTING MACHINE CONNECTED TO MULTIPLE PERIPHERAL UNITS BY A BUS |
| DE4000295C2 (en) * | 1990-01-08 | 1994-05-19 | Heidelberger Druckmasch Ag | Device for diagnosing a control system of a printing press |
| DE4113321A1 (en) * | 1991-04-24 | 1992-10-29 | Merten Gmbh & Co Kg Geb | METHOD FOR MONITORING THE FUNCTION OF A BUS CONNECTING UNIT |
| DE4237837A1 (en) * | 1991-11-21 | 1993-06-03 | Koenig & Bauer Ag | |
| DE4212742A1 (en) * | 1992-04-16 | 1993-10-21 | Bayerische Motoren Werke Ag | Error identification on data bus lines - has feedback lines from bus to microprocessor to compare voltage levels with reference values for fault identification |
| DE4437417A1 (en) * | 1993-10-19 | 1995-04-20 | Deutsche Bundespost Telekom | Method for monitoring digital signal connections |
-
1995
- 1995-02-23 DE DE19506261A patent/DE19506261A1/en not_active Withdrawn
-
1996
- 1996-02-06 DE DE59600488T patent/DE59600488D1/en not_active Expired - Fee Related
- 1996-02-06 AT AT96101643T patent/ATE170458T1/en not_active IP Right Cessation
- 1996-02-06 EP EP96101643A patent/EP0728581B1/en not_active Expired - Lifetime
- 1996-02-21 US US08/607,262 patent/US5730053A/en not_active Expired - Fee Related
- 1996-02-23 JP JP8036913A patent/JP2766242B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE19506261A1 (en) | 1996-09-05 |
| DE59600488D1 (en) | 1998-10-08 |
| JPH08267722A (en) | 1996-10-15 |
| JP2766242B2 (en) | 1998-06-18 |
| US5730053A (en) | 1998-03-24 |
| ATE170458T1 (en) | 1998-09-15 |
| EP0728581A2 (en) | 1996-08-28 |
| EP0728581A3 (en) | 1997-05-21 |
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