JP2009171138A - Individual information storage system, individual information storage method, node, and inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To standardize nodes before being connected to one and the same communication bus, the each node becoming possible to identify its individual information after being connected to one and the same communication bus and to simplify its configuration, regarding an individual information storage system, an individual information storage method, the nodes and an inspection device. <P>SOLUTION: The individual information storage system causes a plurality of nodes to store their respective individual information, the plurality of nodes being connected to one and the same communication bus and performing control with the same content on control objects different from each other. While the plurality of nodes are connected to one and the same communication bus, a power controller capable of controlling power supply to each node is made to execute processing for sequentially supplying power to all the nodes one by one, a writer connected to the communication bus is made to transmit individual information to be written for each node to which the power is supplied to the communication bus in a process in which the power is sequentially supplied to all the nodes one by one, and then, the nodes to which the power is supplied are made to store the individual information transmitted from the writer to the communication bus into a storage device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an individual information storage system, an individual information storage method, a node, and an inspection apparatus, and in particular, to a plurality of nodes that are connected to the same communication bus and perform the same control on different control targets. The present invention relates to a device suitable for storing its own individual information.

Conventionally, multiple electronic control units (nodes) that control the same content for multiple different control objects such as front and rear windows and left and right banks of engine valve lifts connected to the same communication bus Such a system is known (see, for example, Patent Document 1). Each node described in Patent Document 1 contains information related to a plurality of control parameters of a plurality of systems, and a corresponding system identification number is assigned from a system identification number assigning device via a harness. The control parameter corresponding to is selected and functions as an electronic control unit corresponding to the system. Therefore, the types of nodes can be reduced as much as possible when manufacturing the nodes. As a result, each node can be prevented from being erroneously mounted, and each node can be manufactured and managed efficiently and economically. It becomes.
JP-A-5-286396

  However, in the one described in Patent Document 1 described above, in order to make each node function, it is necessary to store in advance information related to the control parameters of the system that does not correspond to the own node in each node. It is difficult to realize an inexpensive and efficient system that wastes capacity. Moreover, in the thing of above-mentioned patent document 1, in order to give a system identification number to a node, since a dedicated wire harness is used, it is necessary to provide a terminal which becomes useless after attachment to a node. It is difficult to realize an inexpensive and efficient system.

  The present invention has been made in view of the above-mentioned points, and is made common before connection to a communication bus of a node capable of identifying its own individual information after connection to the same communication bus and simplification of the configuration. It is an object of the present invention to provide an individual information storage system, an individual information storage method, a node, and an inspection apparatus that can be realized.

  The object described above is an individual information storage system that stores its own individual information in a plurality of nodes that are connected to the same communication bus and that perform control of the same content on different control targets. A power supply control device comprising individual power supply means for executing a process of sequentially supplying power to all nodes one by one in a situation where the nodes are connected to the same communication bus, and the power supply control connected to the communication bus Write comprising individual information sending means for sending individual information to be written to the communication bus for each node to which power is supplied in the process in which power is sequentially supplied to all nodes one by one by the individual power supply means of the apparatus Each node is connected to the communication device from the writing device when power is supplied by the individual power supply means of the power control device. It is achieved by the individual information storage system comprising individual information storage control means for storing stored in the storage device individual information sent to the bus.

  Further, the above object is an individual information storage method for storing individual information of one's own in a plurality of nodes connected to the same communication bus and performing control of the same content for different control targets, An individual power supply that executes a process in which a power control device that can control power supply to each node supplies power to each node one by one in a situation where multiple nodes are connected to the same communication bus Step, and in the process of supplying power one by one to all nodes in the individual power supply step, the writing device connected to the communication bus stores individual information to be written for each node to which power is supplied. A node to which power is supplied in the individual information sending step to be sent to the communication bus and the individual power supply step is sent from the writing device to the communication bus. And individual information storage step of storing store individual information in the storage device, is achieved by the individual information storage method comprising the.

  In the inventions of these aspects, each node is supplied with power one by one by the process of the power supply control device in a situation where all nodes are connected to the same communication bus, and writing is performed when the power supply is performed. The individual information sent to the communication bus from the storage device is stored in the storage device. The individual information sent from the writing device to the communication bus is different for each node, and is unique to be written to the node to which power is supplied. Therefore, unique individual information is written in each node after connection to the communication bus.

  For this reason, at the stage before connection to the communication bus such as the node manufacturing stage, all the nodes can be of one type. In addition, after connecting to the communication bus, each node can distinguish its own individual information from other nodes, and each node can store its individual information to identify its individual information. The capacity of the storage device to be kept can be minimized. Therefore, according to the present invention, it is possible to achieve commonality and simplification of the configuration of nodes that can identify their individual information after connection to the same communication bus before connection to the communication bus.

  In addition, a storage device in which the individual information is stored and saved by the individual information storage method described above, and individual information identification means for identifying own individual information based on the individual information stored and saved in the storage device are provided. The node is effective in realizing commonality of the nodes connected to the communication bus and simplification of the configuration.

  Also, it is an inspection apparatus that is connected to the same communication bus and stores its own individual information in a plurality of nodes that perform control of the same content on different control targets, and the plurality of nodes are in the same communication Individual power supply means for executing processing for supplying power one by one to all nodes in the state of being connected to the bus, and a process for supplying power one by one to all nodes in order by the individual power supply means And individual information transmitting means for transmitting individual information to be written to each communication-supplied node to the communication bus, each of which can identify its own individual information after connection to the same communication bus This is effective in realizing commonality and simplification of the configuration before connection of the node to the communication bus.

  ADVANTAGE OF THE INVENTION According to this invention, the connection before the connection to the communication bus of the node which can identify each individual information after connecting to the same communication bus and the simplification of the structure can be achieved.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a system according to an embodiment of the present invention. The system shown in FIG. 1 is a system for writing individual information to each of a plurality of electronic control units constituting an in-vehicle network system mounted on a vehicle.

  The in-vehicle network system according to the present embodiment includes a plurality (two in this embodiment) of electronic control units (ECUs) 10 mainly composed of computers. Hereinafter, the ECUs 10 are appropriately referred to as ECUs 10-1 and 10-2, respectively. Each of these ECUs 10 is formed with the same hardware configuration and operates with the same software.

  Each ECU 10 is connected to an input system (such as various switches and sensors) and an output system (such as a motor). Each ECU 10 is connected to a different control target (for example, the left and right banks of the valve lift of the vehicle engine, the left and right windows of the vehicle body, the headlights of the left and right sides of the vehicle body), and is the same for each control target. Control the contents (for example, control of vertical movement of the window).

  Each ECU 10 is a node connected to the same communication bus 12. The communication bus 12 is a CAN bus including a pair of communication lines, and transmits digital signals obtained by converting various data according to a predetermined communication protocol. Specifically, a differential voltage corresponding to the level is generated in the pair of communication lines as the digital signal.

  Each ECU 10 includes a central processing unit (CPU) 14, a CAN communication circuit 16, a power supply device 18, a system down (SDWN) signal receiving circuit 20, and a storage device 22. In the following, the CPU 14, the CAN communication circuit 16, the power supply device 18, the SDWN signal receiving circuit 20, and the storage device 22 of the ECUs 10-1 and 10-2 will be referred to as CPUs 14-1 and 14-2, respectively. CAN communication circuits 16-1 and 16-2, power supply devices 18-1 and 18-2, SDWN signal reception circuits 20-1 and 20-2, and storage devices 22-1 and 22-2.

  The CAN communication circuit 16 is connected to the CPU 14 and to the communication bus 12 described above. That is, the CAN communication circuit 16 is interposed between the CPU 14 and the communication bus 12. The CAN communication circuit 16 receives a data frame including data addressed to its own ECU 10 flowing on the communication bus 12 and supplies the data frame to the CPU 14, and when it is instructed to send data to the other ECU 10 from the CPU 14. A data frame including the data and the individual information of the ECU 10 as the destination is sent to the communication bus 12.

  The power supply device 18 is connected to the CPU 14 and is a device that supplies power to the CPU 14. The CPU 14 performs a control operation when power is supplied from the power supply device 18, and stops control when power is not supplied from the power supply device 18. The SDWN signal receiving circuit 20 is connected to the power supply device 18 and can be connected to an inspection device 30 to be described later via an SDWN signal line 32. The SDWN signal receiving circuit 20 can receive a request signal supplied from the inspection device 30. When a request signal requesting a system down to stop power supply to the CPU 14 is received, a corresponding power supply device When a request signal requesting system up to start power supply to the CPU 14 is received, the corresponding power supply device 18 is supported. The CPU 14 is instructed to supply power to the CPU 14. The power supply device 18 controls power supply to the CPU 14 in accordance with a command from the SDWN signal receiving circuit 20.

  The storage device 22 is a non-volatile memory connected to the CPU 14. The storage device 22 is provided with an individual information area for storing unique individual information for distinguishing the own ECU 10 from other ECUs 10. As this individual information area, for example, at least 2 bits are allocated, “00b” when not stored, “01b” when stored for the left, and “10b” when stored for the right. "11b" is stored and stored in the individual information area when the ECU 10 is not defined.

  In the above-described in-vehicle network system, when a plurality of ECUs 10 are connected to the communication bus 12 and individual information is stored in each ECU 10 as will be described later, the necessary data and the destination of the data of the ECU 10 are thereafter stored. A data frame including the individual information is appropriately sent onto the communication bus 12 and received by the ECU 10 as the destination. And ECU10 will perform a predetermined control process according to the data contained in the data frame, if the data frame addressed to self is received.

  Next, with reference to FIG. 2 to FIG. 5 together with FIG. 1 described above, a process for writing individual information for distinguishing the ECU 10 from other ECUs 10 in the present embodiment will be described.

  FIG. 2 shows a flowchart of an example of a control routine executed by the CPU 34 to write individual information in the ECU 10 in the inspection apparatus 30 of the present embodiment. FIG. 3 shows a flowchart of an example of a main routine executed by the CPU 14 in each ECU 10 of the present embodiment. FIG. 4 shows a flowchart of an example of a subroutine executed by the CPU 14 in each ECU 10 of the present embodiment. FIG. 5 is a diagram showing information exchange between the inspection apparatus 30 and the ECU 10 when individual information is written in the ECU 10 in this embodiment. 5A shows information exchange between the ECU 10 and the inspection apparatus 30 that match the transmitted individual information, and FIG. 5B shows an ECU 10 and the inspection apparatus 30 that do not match the transmitted individual information. Information exchange with is shown respectively.

  When processing for writing individual information to the ECU 10 is performed in a vehicle manufacturing factory, an in-vehicle network system assembly factory, or the like, first, before the writing, the inspection device 30 is connected to the communication bus 12 constituting the in-vehicle network system of the present embodiment. The inspection device 30 is connected to the SDWN signal receiving circuit 20 of each ECU 10 via the SDWN signal line 32 while being connected.

  The inspection device 30 includes a CPU 34, a CAN communication circuit 36, and an SDWN signal transmission circuit 38. The SDWN signal transmission circuit 38 is provided in the same number (two in this embodiment) as the number of ECUs 10 constituting the in-vehicle network system. In the following, each SDWN signal transmission circuit 38 is appropriately referred to as an SDWN signal transmission circuit 38-1 and an SDWN signal transmission circuit 38-2.

  The CAN communication circuit 36 is connected to the CPU 34 and to the communication bus 12 described above. That is, the CAN communication circuit 36 is interposed between the CPU 34 and the communication bus 12. Therefore, the inspection device 30 and each ECU 10 are connected to each other via the communication bus 12. The CAN communication circuit 36 sends a data frame including the data (specifically, individual information to be written to the ECU 10 as a destination) to the communication bus 12 when the CPU 34 instructs to send data to the ECU 10. At the same time, the data frame including the data addressed to the self-inspection apparatus 30 flowing on the communication bus 12 is received and supplied to the CPU 34.

  Each SDWN signal transmission circuit 38 is connected to the CPU 34 and also connected to the SDWN signal reception circuit 20 of the corresponding ECU 10 via the SDWN signal line 32. Specifically, the SDWN signal transmitting circuit 38-1 is connected to the SDWN signal receiving circuit 20-1 via the SDWN signal line 32-1, and the SDWN signal transmitting circuit 38-2 is connected to the SDWN signal line 32-2 via the SDWN signal line 32-2. Each is connected to the receiving circuit 20-1.

  Each SDWN signal transmission circuit 38 can transmit a request signal to the corresponding ECU 10 according to a command from the CPU 34, and responds when a command requesting power supply to the corresponding ECU 10 is received from the CPU 34. A request signal for requesting the system up of the corresponding ECU 10 to be sent to the SDWN signal line 32 of the corresponding SDWN signal line 32. On the other hand, if a command requesting that the power supply to the corresponding ECU 10 is stopped is received from the CPU 34, the corresponding SDWN signal line A request signal for requesting system down of the ECU 10 corresponding to 32 is transmitted.

  Thus, after the connection of the CAN communication circuit 36 of the inspection device 30 to the communication bus 12 and the connection of the SDWN signal transmission circuit 38 to each ECU 10 via the SDWN signal line 32 are completed, the inspection device 30 Immediately after the activation, the CPU 34 supplies a Lo command signal requesting all the SDWN signal transmission circuits 38-1 and 38-2 not to supply power to the corresponding ECUs 10 (step 100). In this case, all the SDWN transmission circuits 38 do not supply a command signal for requesting system up to the corresponding ECU 10, so that all the ECUs 10 are maintained in a non-energized state.

  When the process of writing the individual information to each ECU 10 is started from this state, the CPU 34 sends all the SDWN signal transmission circuits 38 to the corresponding ECU 10 one by one in a predetermined order (for example, left order → right order). A Hi command signal for requesting power supply is supplied (step 102), and in the process of sequentially supplying power to all of the ECUs 10 one by one, each ECU 10 to which power is supplied should be written in the ECU 10 A command signal for instructing the CAN communication circuit 36 to transmit a data frame including individual information is supplied (step 104).

  Specifically, the CPU 34 first supplies, for example, a Hi command signal for requesting power supply to the corresponding ECU 10-1 to the SDWN signal transmission circuit 38-1 for the output system provided on the left side of the vehicle body. In this case, the SDWN signal transmission circuit 38-1 for the left sends a request signal for requesting system up to the ECU 10-1 corresponding to the SDWN signal line 32-1, and the SDWN signal reception circuit 20- of the ECU 10-1 1 receives the request signal through the SDWN signal line 32-1, and issues a command to request the power supply device 18 to supply power to the corresponding CPU 14-1, so that only the ECU 10-1 has the power supply device. Power is supplied (energized) from 18. On the other hand, since the right SDWN signal transmission circuit 38-2 does not send a request signal for requesting system up to the ECU 10-2 corresponding to the SDWN signal line 32-2, the ECU 10-2 is maintained in a non-energized state.

  When the CPU 34 starts the process of supplying power to the ECU 10-1 as described above, the ECU 10- is addressed to the ECU 10-1 to which power is supplied to the CAN communication circuit 36 when the power is supplied. 1 is supplied with a command signal for instructing that a data frame including the individual information should be transmitted so that the left individual information to be stored and saved is transmitted. In this case, the CAN communication circuit 36 sends out the data frame including the left individual information to the communication bus 12, so that the data frame including the left individual information flows through the communication bus 12.

  When the power is supplied from the power supply device 18, the ECU 10 has individual information other than that indicating that it is not stored in the individual information area of the storage device 22 that it owns (specifically, for left, right, or undefined). It is discriminated whether or not the data is stored (step 200). As a result, when it is determined that the individual information is already stored in the storage device 22, the individual information is identified based on the individual information stored and stored in the storage device 22 as usual. Then, the data frame addressed to the ECU 10 flowing through the communication bus 12 is received, and a predetermined control process (for example, window opening / closing) is executed based on the data included in the data frame (step 202). On the other hand, if it is determined that the information indicating that the storage device 22 is not stored is stored, that is, if the individual information other than the storage device is not yet stored, the individual information is written in the storage device 22 next. Processing is executed (step 204).

  Specifically, first, it is determined whether or not to receive a data frame including individual information transmitted from the inspection apparatus 30 via the communication bus 12 (step 250), and the process is repeated until an affirmative determination is made. If the data frame is received and an affirmative determination is made, then the individual information included in the data frame is for left or right (for example, “1” or “2”). Whether or not (step 252). As a result, when it is determined that the individual information does not indicate left or right, predetermined error processing (for example, abnormality display or abnormality alarm) is performed on the assumption that some abnormal failure has occurred (step 254).

  On the other hand, if it is determined that the received individual information is for left or right, the received individual information is stored and saved in the individual information area of the storage device 22 of the own ECU 10 (step 256). When the storage and storage are completed, a data frame indicating that the storage of the transmitted individual information in the storage device 22 is completed is transmitted to the inspection device 30 via the communication bus 12 (step 258).

  For example, when a data frame including individual information flows through the communication bus 12 in a state where only the ECU 10-1 is energized as described above, the CAN communication circuit 16-1 of the energized ECU 10-1 passes through the communication bus 12. Although the flowing data frame can be received, the other CAN communication circuit 16-2 of the ECU 10-2 that is not energized cannot receive the data frame flowing through the communication bus 12. In this case, only the CAN communication circuit 16-1 of the energized ECU 10-1 can receive the data frame containing the individual information for the left, and when the CAN communication circuit 16-1 receives the data frame, the data frame The left individual information included in the frame becomes “01b” and is stored and saved in the storage device 22-1.

  When the storage and storage of the individual information in the storage device 22-1 is executed and completed, the CPU 14-1 indicates that the storage and storage of the left individual information for the inspection device 30 is completed in the CAN communication circuit 16-1. Command to send a frame. In this case, the CAN communication circuit 16-1 sends to the communication bus 12 a data frame indicating that the storage of the individual information in the storage device 22-1 of the own ECU 10-1 has been completed. Thus, a data frame indicating completion of storage of the individual information for the left flows through the communication bus 12.

  When a data frame indicating that the individual information is stored and stored in the storage device 22-1 is sent to the communication device 12 for the inspection device 30, only the CAN communication circuit 36 of the inspection device 30 passes through the communication bus 12. When the frame can be received and the reception is performed, the data frame is supplied to the CPU 34. The CPU 34 supplies a Hi command signal for requesting the SDWN signal transmission circuit 38-1 to supply power to the corresponding ECU 10-1, and sends the individual information for the left to the ECU 10-1 to the CAN communication circuit 36. It shows that the storage and storage of the individual information from the CAN communication circuit 36 to the storage device 22-1 of the ECU 10-1 is completed within a predetermined time after the command signal instructing that the included data frame should be transmitted is supplied. It is determined whether or not a data frame is supplied (step 106).

  As a result, when it is determined that the data frame is not supplied within the predetermined time, predetermined error processing (for example, abnormality display or abnormality alarm) is performed as a communication abnormality by the communication bus 12 or a failure of the ECU 10 itself (step 108). . On the other hand, when it is determined that the data frame is supplied within the predetermined time, first, a Lo command signal for requesting the left SDWN signal transmission circuit 38-1 to stop power supply to the corresponding ECU 10-1 is issued. Supply. In this case, the left SDWN signal transmission circuit 38-1 transmits a request signal requesting system down to the corresponding ECU 10-1, and the SDWN signal reception circuit 20-1 of the ECU 10-1 receives the request signal. Then, since the power supply device 18 is instructed to stop the power supply to the corresponding CPU 14-1, the ECU 10-1 is shifted from the energized state to the non-energized state.

  When the ECU 10-1 is thus shifted to the non-energized state, the CPU 34 of the inspection apparatus 30 next performs a process of switching the SDWN signal transmission circuit 38 that supplies the Hi command signal, and an output provided on the right side of the vehicle body. A Hi command signal for requesting power supply to the corresponding ECU 10-2 is supplied to the system SDWN signal transmission circuit 38-2. In this case, the ECU 10-1 is maintained in a non-energized state, but the ECU 10-2 is supplied with power (energized) from the power supply device 18.

  When the CPU 34 starts a process of supplying power to the ECU 10-2, the CPU communication circuit 36 stores the ECU 10-2 in the ECU 10-2 to which the power is supplied when the power is supplied. A command signal for instructing to transmit a data frame including the individual information is supplied so that the right individual information to be stored is transmitted. In this case, a data frame including the right individual information flows on the communication bus 12.

  When a data frame including individual information flows through the communication bus 12 with only the ECU 10-2 energized, only the CAN communication circuit 16-2 of the energized ECU 10-2 flows through the communication bus 12. When the data frame including the individual information for the data is received and received, the right individual information included in the data frame becomes “10b” and is stored and saved in the storage device 22-2. . When the storage and storage are completed, the CPU 14-2 instructs the CAN communication circuit 16-2 to transmit a data frame indicating that the storage and storage of the individual information is completed to the inspection device 30. In this case, a data frame indicating completion of storage of the right individual information flows through the communication bus 12.

  When a data frame indicating that the storage of the individual information in the storage device 22-2 is completed is sent to the communication bus 12 to the inspection device 30, only the CAN communication circuit 36 of the inspection device 30 uses the communication bus 12. A flowing data frame can be received, and when such reception is made, the data frame is supplied to the CPU 34. After the power supply command to the ECU 10-2 and the transmission command of the data frame including the right individual information, the CPU 34 transmits the individual information from the ECU 10-2 to the storage device 22-2 through the communication bus 12 within a predetermined time. When the data frame indicating that the storage and storage is completed is received, a Lo command signal for requesting the SDWN signal transmission circuit 38-2 to stop the power supply to the corresponding ECU 10-2 is supplied. In this case, the ECU 10-2 is shifted from the energized state to the non-energized state.

  When the CPU 34 of the inspection device 30 determines that the individual information has been written in the storage devices 22 of all the ECUs 10 constituting the in-vehicle network system by the above processing, the writing processing ends. Then, the inspection device 30 is disconnected from the communication bus 12 and disconnected from each ECU 10 via the SDWN signal line 32. Further, when the individual information is written in the storage devices 22 of all the ECUs 10 constituting the in-vehicle network system by the above processing, the ECU 10 is normally operated in a situation where the vehicle is started and power is supplied to the ECU 10. The individual information is identified based on the individual information stored and stored in the storage device 22, and a predetermined control process is executed (step 202).

  As described above, according to this embodiment, after all ECUs 10 are connected to the communication bus 12 constituting the in-vehicle network system, power is sequentially supplied to each of the ECUs 10 in accordance with a command from the inspection device 30. be able to. Then, in the process of sequentially supplying power to all the ECUs 10 one by one, the individual information to be written for each ECU 10 to which power is supplied is sent from the inspection device 30 to the communication bus 12, whereby the storage device 22 of each ECU 10. Individual information sent to the communication bus 12 can be stored and stored in each. Here, the individual information sent from the inspection device 30 to the communication bus 12 is different for each ECU 10, and is unique to be written in the ECU 10 where power is actually supplied. Therefore, according to the present embodiment, it is possible to write, store and save individual individual information in each ECU 10 after connection to the communication bus 12.

  If individual information is written to each ECU 10 after connection to the communication bus 12 in this way, the ECU 10 itself is manufactured separately from the left control object and the right control object before connection to the communication bus 12. It is not necessary to store, manage and manage, and it is not necessary to incorporate control software dedicated to the left control object or the right control object. For this reason, before the connection to the communication bus 12 such as the hardware manufacturing stage or the software incorporation stage of the ECU 10, all the ECUs 10 constituting the in-vehicle network system can be used as one type.

  If individual individual information is written to each ECU 10 after connection to the communication bus 12, each individual ECU 10 can be distinguished from other ECUs 10 to identify its own individual information. In order for the ECU 10 to identify its own individual information, it is sufficient to store only the individual information of the own ECU 10 in each storage device 22, so that the capacity of the individual information area of the storage device 22 of each ECU 10 is minimized. It becomes possible to.

  Therefore, according to the present embodiment, the individual ECUs 10 can be identified after being connected to the communication bus 12 while sharing the ECUs 10 before the connection to the communication bus 12. The configuration of the ECU 10 can be simplified. For this reason, it is possible to improve the efficiency in manufacturing the ECU 10 and constructing the in-vehicle network system.

  In the above embodiment, the ECU 10 corresponds to the “node” described in the claims, and the inspection device 30 corresponds to the “power control device” and the “writing device” described in the claims. ing.

  Further, in the above embodiment, the CPU 34 of the inspection apparatus 30 executes the process of step 102 in the routine shown in FIG. 2 to thereby execute “individual power supply means” and “individual power supply step” described in the claims. "Individual information sending means" and "individual information sending step" described in the claims by executing the processing of step 104, the CPU 14 of the ECU 10 executes the processing of step 256 in the routine shown in FIG. By executing the “individual information storage control means” and “individual information storage step” described in the claims, the individual information stored in the individual information area of the storage device 22 is stored based on the individual information. The “individual information identifying means” described in the claims is realized by the identification.

  By the way, in said Example, although the vehicle-mounted network system shall be comprised by two ECU10, this invention is not limited to this, The vehicle-mounted network system comprised by three or more ECU10 is provided. It may be applied. For example, it is an in-vehicle network system including four ECUs 10 that execute control of the same contents with respect to windows on the left and right sides of the vehicle body as control targets.

  In the above-described embodiment, the network system in which a plurality of ECUs 10 are connected to the communication bus 12 is mounted on the vehicle. However, a plurality of nodes that perform the same control on different control targets. If it exists, it is good also as applying to factory facilities etc. besides a vehicle.

It is a block diagram of the system which is one Example of this invention. It is a flowchart of an example of the control routine performed in order to write individual information in the memory | storage device of a node in the inspection apparatus of a present Example. It is a flowchart of an example of the subroutine performed in each node of a present Example. It is a flowchart of an example of the subroutine performed in each node of a present Example. It is a figure showing transmission / reception of the information between a test | inspection apparatus and a node when individual information is written in a node in a present Example.

Explanation of symbols

10 Electronic control unit (ECU)
12 Communication bus 22 Storage device 30 Inspection device

Claims (4)

It is an individual information storage system for storing its own individual information in a plurality of nodes connected to the same communication bus and performing the same control on different control targets,
A power control device comprising individual power supply means for executing processing for supplying power one by one to all nodes in a state where the plurality of nodes are connected to the same communication bus;
Individual information to be written for each node to which power is supplied in the process in which power is sequentially supplied to all nodes by the individual power supply means of the power supply controller connected to the communication bus. A writing device comprising individual information sending means for sending,
Individual information storage control in which each node stores and saves individual information sent from the writing device to the communication bus when power is supplied by the individual power supply means of the power control device. An individual information storage system comprising means. An individual information storage method for storing own individual information in a plurality of nodes connected to the same communication bus and performing the same control on different control targets,
An individual power supply for executing a process in which a power supply control device capable of controlling power supply to each node supplies power to each node one by one in order in a situation where the plurality of nodes are connected to the same communication bus A supply step;
In the process of supplying power one by one to all nodes in the individual power supply step, the writing device connected to the communication bus writes individual information to be written for each node to which power is supplied. Individual information sending step to send to
A node to which power is supplied in the individual power supply step, an individual information storage step of storing and storing individual information sent from the writing device to the communication bus in a storage device;
An individual information storage method comprising: A storage device for storing and storing individual information by the individual information storage method according to claim 2;
Based on individual information stored and stored in the storage device, individual information identifying means for identifying individual information of itself,
A node characterized by comprising: It is an inspection device that stores its own individual information in a plurality of nodes that are connected to the same communication bus and that perform the same content control on different control targets,
Individual power supply means for executing a process of sequentially supplying power one by one to all nodes in a situation where the plurality of nodes are connected to the same communication bus;
Individual information sending means for sending to the communication bus individual information to be written for each node to which power is supplied in the process of supplying power one by one to all nodes in turn by the individual power supply means;
An inspection apparatus comprising:

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