WO2022228797A1 - Austausch einer speicherprogrammierbaren steuerung - Google Patents
Austausch einer speicherprogrammierbaren steuerung Download PDFInfo
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- WO2022228797A1 WO2022228797A1 PCT/EP2022/058068 EP2022058068W WO2022228797A1 WO 2022228797 A1 WO2022228797 A1 WO 2022228797A1 EP 2022058068 W EP2022058068 W EP 2022058068W WO 2022228797 A1 WO2022228797 A1 WO 2022228797A1
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- WO
- WIPO (PCT)
- Prior art keywords
- programmable logic
- logic controller
- data
- cycle
- network
- Prior art date
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- 238000000034 method Methods 0.000 claims abstract description 214
- 238000004891 communication Methods 0.000 claims abstract description 62
- 230000006854 communication Effects 0.000 claims abstract description 62
- 238000012546 transfer Methods 0.000 claims abstract description 35
- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 description 37
- 238000011161 development Methods 0.000 description 9
- 230000018109 developmental process Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 230000007704 transition Effects 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- 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
- H04L12/40169—Flexible bus arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/052—Linking several PLC's
-
- 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
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
- H04L12/40195—Flexible bus arrangements involving redundancy by using a plurality of nodes
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/12—Plc mp multi processor system
- G05B2219/1208—Communication, exchange of control, I-O data between different plc
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/12—Plc mp multi processor system
- G05B2219/1209—Exchange control, I-O data to other plc, individually, without host
-
- 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
-
- 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
- the invention relates to a method for replacing a programmable logic controller, a device for carrying out the method, a computer program product and a computer-readable medium.
- Complex and/or automated processes are usually controlled by means of a programmable logic controller.
- the controlled process In order to replace such a programmable logic controller, for example for the purpose of maintenance, the controlled process previously had to be stopped and restarted after replacing the programmable logic controller. Such an interruption of the controlled process leads to considerable downtime and can thus cause considerable costs.
- a ring topology or a topology with separate signal connections between the two memory-programmable controls can be provided as the physical topology, for example.
- a significant interruption of the process to be controlled can be prevented in the event of an exchange of a programmable logic controller, this requires the selection of a predetermined physical network topology.
- the object of the invention is to specify an improved method for replacing a stored-program controller, in which the replacement can be implemented in a cost-effective and time-efficient manner. This object is achieved by a method having the features of claim 1.
- the invention is based on the object of specifying a device for carrying out the method according to the invention.
- the invention is based on the object of providing a computer program product for carrying out the method according to the invention with the device according to the invention.
- the invention is based on the object of specifying a computer-readable medium on which the computer program product according to the invention is stored.
- data is transmitted between different network participants in a network according to a communication cycle of consecutive time intervals defined in a communication scheme.
- the data is transmitted in a time-controlled manner.
- the time settings of the network participants are preferably coordinated synchronously with one another in accordance with a common clock signal. This can be done, for example, by means of a so-called "Precision Time Protocol (PTP)" known to the person skilled in the art. be lized.
- PTP Precision Time Protocol
- predetermined network participants are each authorized either to send or to receive the data.
- the communication cycle can be implemented on the basis of a time-division multiplex method, for example.
- the time-division multiplex method is also known as "Time Division Multiple Access” or the abbreviation "TDMA" derived from it.
- the time-division multiplex method is preferably a synchronous time-division multiplex method.
- time intervals with a fixed time length are In this way, communication in a network can be easily separated physically network topologies can be achieved.
- the data can be transmitted using a secure transmission protocol.
- This can be a transmission protocol according to the IEC 61784-3 standard, for example. In this way, the integrity of the transmitted data can be ensured.
- security requirements that are placed on the transmission of data in a network can be met in a simple manner.
- the data is transmitted between different network participants according to a “publish/subscribe” protocol.
- the data can be transmitted, for example, according to the “OPC UA PubSub” standard.
- the sender can dispense with explicit addressing of the data to one or more recipients.
- the data can be transmitted from one or more transmitters to one or more receivers unknown to the transmitters with little effort.
- At least two predetermined network participants are preferably authorized to transmit data during a time interval of the communication cycle. Particularly preferably, in this one time interval, at least one of the at least two predetermined network users is authorized to send and at least one other of the at least two network users is authorized to receive. This enables reliable data transmission from a transmitter to a receiver.
- a first programmable logic controller and a further programmable logic controller are provided as network participants in the network.
- the programmable logic controller can be a modular programmable logic controller, a compact programmable logic controller or a special form of programmable logic controller (PLC) known to those skilled in the art, such as a soft PLC, for example, in which PLC software running on a PC.
- PLC programmable logic controller
- a control function is performed by the first programmable logic controller.
- the first programmable logic controller runs through a process cycle consisting of a number of successive process steps. In each of the process steps, at least part of the data is either read in, processed or output.
- the process cycle here corresponds to a basic scheme that follows the input-processing-output principle. The sequence of the individual process steps can be arbitrary.
- the communication cycle is synchronized with the process cycle in such a way that a predetermined process step of the process cycle is executed during a time interval of the communication cycle assigned to this predetermined process step while the process cycle is running through over time.
- a predetermined process step of the process cycle is preferably end of the time interval of the communication cycle assigned to this predetermined process step. This enables a cost-effective allocation of a transmission of data between predetermined network participants numbers and predetermined process steps of the process cycle.
- the first programmable logic controller is authorized to send data and the further programmable logic controller to receive this data.
- transfer information is output by the first programmable logic controller.
- This transfer information is then read in by the further programmable logic controller during the time interval of the first type.
- the control function is exercised by the further programmable logic controller instead of by the first programmable logic controller.
- the method according to the invention thus makes it possible to transfer a control function from the first memory-programmable controller to the further memory-programmable controller, regardless of the physical topology of the network, in a cost-effective manner.
- an un interruption of the control function can be easily prevented in this way. Downtimes due to an interruption in the control function and a restart of the process to be controlled that is required after the replacement can thus be prevented.
- An advantageous development provides for a status indicator to be output as at least part of the transfer information, based on which an impending transfer of the control function is indicated. In this way, an amount of data for indicating the handover can be kept small.
- process status data is to be understood as data that has information about a progress, a status and/or a status transition of a process controlled by the exercise of the control function.
- the process status data can have information about a status and/or a status transition of a network participant of the network, which is controlled by the programmable logic controller.
- a progress, a state and/or a state transition of a process to be controlled, which deviates from a neutral starting state, can be detected by means of the process state data.
- this process state data is not available for a stored-program controller that assumes a control function of the process to be controlled, this means that the process to be controlled may need to be restarted from the neutral starting state in order to achieve reliable control of the process to be controlled.
- This process status data stored by the first programmable logic controller is output as at least one additional part of the transfer information.
- the further programmable logic controller can reliably take over and continue a control function from the first programmable logic controller on the basis of the transfer information. Successive process steps of the process cycle can then be run through by the further programmable logic controller instead of by the first programmable logic controller. There is no need to restart the process to be controlled.
- the control function can be quickly handed over between the programmable logic controllers. It is also conceivable that the handover information has information about an intended handover time.
- the process cycle be repeated several times from the first memory programmable controller is run through.
- the communi cation cycle is preferably run through several times.
- the communication cycle is particularly preferably run through multiple times synchronously with the process cycle, so that during each run through of the process cycle a predetermined process step of the process cycle is executed during a time interval of the communication cycle assigned to this predetermined process step. In this way, a reliable control function can be provided.
- process status data is recorded and stored by the first programmable logic controller during each run through of the process cycle.
- current process status data are always available for transmission to the further programmable logic controller.
- process status data it is conceivable here for the process status data to be output to the further programmable logic controller during each run through of the process cycle. In this way, a control function can also be continued by the further programmable logic controller in the event of an unforeseen failure of the first programmable logic controller.
- an advantageous development provides that at least one network user of the first type of the network is authorized to send input data during a second type of time interval of the communication cycle.
- the first programmable logic controller and/or the other programmable logic controller are authorized to receive this input data in the time interval of the second type of communication cycle.
- these input data are read in by the first programmable logic controller and/or the further programmable logic controller. This means that there is no need to identify a specific programmable logic controller as the recipient of the input data. In this way, the input data can be Big number, the senders of the data unknown, programmable logic controllers are received simultaneously.
- a sensor for example, can be provided as a network participant of the first type. By means of such a sensor, input data can be output to other network participants, in particular to the first programmable logic controller and/or the other programmable logic controller, during the time interval of the second type.
- the sensor can be a sensor already known to the person skilled in the art, such as a temperature sensor, a pressure sensor or a touch sensor.
- the input data from the first programmable controller and/or the additional programmable controller is processed into an output data record by means of a deterministic data processing program depending on the process status data the.
- a deterministic data processing program is to be understood in the present context as a program which, when executed repeatedly, always calculates the same output data set starting from the same input data and the same process status data. In this case, possible discrepancies between the calculated output data sets can only be due to hardware-related errors.
- data can thus be transmitted between other network participants. A time efficiency of a data flow can be optimized in this way.
- the input data are preferably processed by the further programmable logic controller using the same deterministic data processing program that is also used by the first programmable logic controller to process the input data.
- a further advantageous development provides that during a time interval of the fourth type of communication cycle at least one network subscriber of the second type is authorized to receive data.
- either the first programmable logic controller or the further programmable logic controller is authorized to send data.
- the at least one network participant of the second type first reads in part of the output data record. In this way, the communication scheme can be used to output the output data set to network users of the second type, independently of an identity of the programmable logic controller.
- An advantageous embodiment variant provides that the at least one second-type network subscriber is controlled by means of at least part of the output data record.
- a network participant of the second type can be an actor, for example.
- This actuator can be any actuator already known to a person skilled in the art.
- the actuator can be an electromechanical actuator or a hydraulic or pneumatic actuator. In this way, a control function can be exercised independently of an identity of the programmable logic controller. This allows a control function performed by the first programmable logic controller to be continued without interruption by the further programmable logic controller after the transfer information has been received.
- a further advantageous development provides that if the process cycle is run through multiple times by the first programmable logic controller, the control function after the transfer information has been read in is exercised by the further programmable logic controller instead of by the first programmable logic controller, beginning with a start time of a process cycle. This enables one of the first programmable logic controllers Control started process cycle can be terminated by this first spei cherprogrammbare controller. A process cycle can thus be run through by the further programmable logic controller from the beginning. An immediately following process cycle is preferably run through by the further programmable logic controller instead of by the first programmable logic controller. A particularly rapid handover can thereby be made possible.
- an advantageous development provides that if the process cycle is run through multiple times by the first programmable logic controller after the transfer information has been read in, the same process cycle is run through by the further programmable logic controller instead of by the first programmable logic controller. By going through the same process cycle, the same process steps are performed in the same order of the process cycle from the further programmable logic controller instead of from the first programmable logic controller. In this way, a tried and tested control function can be retained regardless of whether the programmable logic controller is replaced.
- the method according to the invention can be carried out by means of the device according to the invention.
- the device according to the invention has a plurality of network participants networked with one another in a network.
- the device has the network participants described above, which are each set up to implement the features described above in the respective context with the corresponding network participant.
- Data can be transmitted between the various network participants in the network in accordance with a communication cycle defined in a communication scheme, consisting of successive time intervals.
- the communication scheme and the communication cycle are, in particular, the written communication scheme and the communication cycle described in connection with the method.
- predetermined network users of the network can each be authorized either to send or to receive the data.
- the device according to the invention has a first programmable logic controller and a further programmable logic controller as network participants.
- the first programmable logic controller is set up to exercise a control function by running through a process cycle consisting of a number of successive process steps. Furthermore, the first programmable logic controller is set up to either read in, process or output part of the data in each of the several successive process steps.
- the process cycle and the associated process steps are, in particular, the process cycle described in connection with the method and the process steps described in connection with the method.
- the communication cycle is synchronized with the process cycle in such a way that while the process cycle is running through over time, a predetermined process step of the process cycle can be executed during a time interval of the communication cycle assigned to this predetermined process step.
- the further programmable logic controller is set up here to perform the control function instead of the first programmable logic controller after reading in transfer information output by the first programmable logic controller during a time interval of the first type.
- At least one network subscriber of the second type can be controlled by the first programmable logic controller and by the further programmable logic controller by means of the network. This makes it easy to replace a programmable logic controller that is designed to perform a control function.
- the device according to the invention can be prompted to carry out the method according to the invention.
- the computer program product according to the invention is stored on the computer-readable medium according to the invention.
- FIG. 1 shows a schematic representation of an exemplary embodiment of a device according to the invention
- the network 10 has four network participants that are networked with one another. Basically, in practice, the network 10 can have any other number of network participants. For the sake of clarity, the following exemplary embodiment is described using the four network participants. In practice, the number of network participants depends on the requirements of a process to be controlled.
- the network 10 has a first programmable logic controller 26 and a further programmable logic controller 28 as network participants.
- the network 10 has a sensor 40 and an actuator 42, for example.
- Data can be transmitted between the network participants of the network 10 according to a communication cycle 14 defined in a communication scheme 12 .
- the communication cycle 14 is illustrated in FIG. 2 and is implemented in the present exemplary embodiment according to a synchronous time-division multiplex method. This can be implemented, for example, using the "IEEE 802.1Qbv" standard.
- the time settings of the network participants are synchronized with one another according to a common clock signal.
- the time settings of the network participants can be coordinated with one another, for example, using a so-called "Precision Time Protocol (PTP)".
- PTP Precision Time Protocol
- the data is transmitted between the network participants in the present exemplary embodiment on the basis of a "publish/subscribe" protocol.
- the "OPC UA PubSub" standard can be used as a "publish/subscribe” protocol for this purpose
- the communication cycle 14 consists of five consecutive time intervals 16, 18, 20, 22, 24. During the time intervals 16, 18, 20, 22, 24, predetermined network Work participants of the network 10 each authorized either to send or to receive the data.
- the first programmable logic controller 26 is designed to exercise a control function by running through a first process cycle 30 .
- the first programmable logic controller 26 is set up to either read in, process or output at least part of the data in a plurality of successive process steps 32, 34, 36, 38 of the first process cycle 30.
- the control function can be exercised by means of the further programmable logic controller 28 .
- the sensor 40 is set up to record actual status data of a process to be controlled, which is not shown in detail.
- the process to be controlled can be any industrial and/or automated process. For example, it can be a control of a plant, such as a ventilation system in a tunnel, or a control of a machine.
- the actuator 42 is set up to receive target status data of the process to be controlled.
- the process to be controlled is transferred from an actual state to a desired state by means of the actuator 42 on the basis of this desired state data.
- the control function is exercised by means of the first programmable logic controller 26 in that the actual status data is read in in the successive process steps 32, 34, 36, 38 of the first process cycle 30, this actual status data is processed on the basis of a deterministic data processing program in connection with the process status data of the to be controlled before transition to target status data are processed and then the target status data are output.
- the actuator 42 can be controlled by the first programmable logic controller 26 .
- the first programmable logic controller 26 first runs through the first process cycle 30 several times.
- the first process cycle 30 consists of four successive process steps 32, 34, 36, 38.
- the first programmable logic controller 26 input data read.
- the first programmable logic controller 26 processes the input data that has been read in using a deterministic data processing program as a function of process status data to form an output data set.
- the process status data contain information about a status and/or a status transition of the actuator 42.
- the process status data contain information about a progress, a status and/or a status transition of the process to be controlled.
- a state of the actuator 42 can be changed by means of an actuation based on the output data set.
- the process status data are also recorded and stored by means of the first memory-programmable controller 26.
- the first programmable logic controller 26 outputs transfer information. On the basis of the transfer information, an imminent transfer of the control function can be indicated by the first programmable logic controller 26 and/or the process status data can be transmitted.
- the output data record calculated in the second process step 34 is output.
- the communication cycle 14 specified in the communication scheme 12 consists of five consecutive time intervals 16, 18, 20, 22, 24.
- the communication cycle 14 is synchronized with the first process cycle 30 in such a way that during a temporal runthrough of the communication cycle 14, each process step 32, 34, 36, 38 of the first process cycle 30 during one each time interval 16, 18, 20, 22 of the communication cycle 14 assigned to this respective process step 32, 34, 36, 38 is completely executed.
- the first process step 32 of the first process cycle 30 is fully executed during a first time interval 16 of the communication cycle 14 .
- the first programmable logic controller 26 is authorized to receive data.
- the sensor 40 is authorized to transmit data.
- input data in the form of actual status data of the process to be controlled are transmitted from sensor 40 to first programmable logic controller 26 during first time interval 16 .
- the second process step 34 of the first process cycle 30 is completely executed during a second time interval 18 of the communi cation cycle 14 .
- the first programmable logic controller 26 uses a deterministic data processing program to process the input data into an output data set as a function of the process status data.
- the third process step 36 is fully executed.
- the first programmable logic controller 26 is authorized to transmit data.
- the transfer information is output by the first programmable logic controller 26 during the third time interval 20 and is then read in by the additional programmable logic controller 28 .
- the process state data stored by the first programmable logic controller 26 are output as part of the transfer information during the third time interval 20 during each run through of the first process cycle 30 .
- a status indicator is output by the first programmable logic controller 26 as a further part of the transfer information during the third time interval 20 . Based on the status indicator, an imminent handover of the tax function are displayed.
- the further programmable logic controller 28 runs through a further process cycle 46 for reading in and processing the transfer information, consisting of two process steps 48, 50. It is conceivable here that the further process cycle 46 can have further process steps. In the present exemplary embodiment, the further process cycle 46 is run through several times by the further programmable logic controller 28 .
- the further process cycle 46 consists of a first further process step 48 in which the further programmable logic controller 28 reads data and a second further process step 50 in which the further programmable logic controller 28 evaluates and stores the data read. In order to read in the transfer information, the further programmable logic controller 28 is authorized to receive data during the third time interval 20 .
- the further process cycle 46 is synchronized with the communication cycle 14 in such a way that the first further process step 48 is carried out completely during the third time interval 20 .
- the fourth process step 38 is completed.
- the first programmable logic controller 26 is authorized to transmit data and the actuator 42 is authorized to receive the data.
- the output data set is transmitted to the actuator 42 in the form of setpoint status data.
- the actuator 42 is controlled using the target state data and an actual state of the actuator 42 can be converted into a target state.
- the process to be controlled is converted into a desired state by means of the actuator 42 starting from the actual state previously detected by the sensor 40 .
- the communication cycle 14 includes a fifth time interval 24, to which no process step of the first process cycle 30 or of the further process cycle 46 is assigned. During the fifth time interval 24, it is possible for other network participants, not shown, of the network 10 to send or receive data.
- the transfer information is output by the first programmable logic controller 26 in the third process step 36 each time the first process cycle 30 is run through.
- the status indicator either indicates an imminent handover or indicates that no handover of the control function is imminent.
- the control function starting with a start time 44 of a first process cycle 30 immediately following this first process cycle 30, is carried out by the further programmable logic controller 28 exercised by the first programmable logic controller 26.
- the process steps 32 , 34 , 36 , 38 are run through by the further programmable logic controller 28 instead of by the first programmable logic controller 26 .
- the authorizations for the transmission of data during the communi cation cycle 14 previously assigned to the first programmable logic controller 26 in the communication scheme 12 are immediately assigned to the further programmable logic controller 28.
- the control function of the first programmable logic controller 26 is transferred to the other programmable logic controller 28 in a time-efficient and uninterrupted manner from the start time 44 hand over.
- a function of the first programmable logic controller 26 is thus completely replaced by a function of the further programmable logic controller 28 .
- the first programmable logic controller 26 can then be removed from the network 10 .
- the first process cycle 30 is run through multiple times by the further programmable logic controller 28 instead of by the first programmable logic controller 26 .
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- Physics & Mathematics (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Programmable Controllers (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP22718673.1A EP4315762A1 (de) | 2021-04-27 | 2022-03-28 | Austausch einer speicherprogrammierbaren steuerung |
US18/557,662 US20240219882A1 (en) | 2021-04-27 | 2022-03-28 | Exchanging of a programmable logic controller |
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DE102021204165.5 | 2021-04-27 | ||
DE102021204165.5A DE102021204165A1 (de) | 2021-04-27 | 2021-04-27 | Austausch einer speicherprogrammierbaren Steuerung |
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WO2022228797A1 true WO2022228797A1 (de) | 2022-11-03 |
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PCT/EP2022/058068 WO2022228797A1 (de) | 2021-04-27 | 2022-03-28 | Austausch einer speicherprogrammierbaren steuerung |
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US (1) | US20240219882A1 (de) |
EP (1) | EP4315762A1 (de) |
DE (1) | DE102021204165A1 (de) |
WO (1) | WO2022228797A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030033030A1 (en) * | 2000-07-07 | 2003-02-13 | Ron Naismith | Input/output (I/O) scanner for a control system with peer determination |
DE202016007423U1 (de) * | 2016-12-03 | 2018-03-06 | WAGO Verwaltungsgesellschaft mit beschränkter Haftung | Modbus-Netzwerk zur redundanten Fernanbindung |
EP3674824A1 (de) * | 2018-12-28 | 2020-07-01 | Siemens Aktiengesellschaft | Verfahren zum betrieb eines kommunikationssystems zur übermittlung zeitkritischer daten und kommunikationsgerät |
-
2021
- 2021-04-27 DE DE102021204165.5A patent/DE102021204165A1/de active Pending
-
2022
- 2022-03-28 US US18/557,662 patent/US20240219882A1/en active Pending
- 2022-03-28 WO PCT/EP2022/058068 patent/WO2022228797A1/de active Application Filing
- 2022-03-28 EP EP22718673.1A patent/EP4315762A1/de active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030033030A1 (en) * | 2000-07-07 | 2003-02-13 | Ron Naismith | Input/output (I/O) scanner for a control system with peer determination |
DE202016007423U1 (de) * | 2016-12-03 | 2018-03-06 | WAGO Verwaltungsgesellschaft mit beschränkter Haftung | Modbus-Netzwerk zur redundanten Fernanbindung |
EP3674824A1 (de) * | 2018-12-28 | 2020-07-01 | Siemens Aktiengesellschaft | Verfahren zum betrieb eines kommunikationssystems zur übermittlung zeitkritischer daten und kommunikationsgerät |
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EP4315762A1 (de) | 2024-02-07 |
DE102021204165A1 (de) | 2022-10-27 |
US20240219882A1 (en) | 2024-07-04 |
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