JP2010232867A - Relay system, relay apparatus, and control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay system, with which wiring saving and reduction in weight can be achieved in an overall in-vehicle communication system, and to provide a relay apparatus and a control device, which constitute the relay system. <P>SOLUTION: An ECU (Electronic Control Unit) 10 including a microcomputer 11, a power supply circuit 12 and CAN (Controller Area Network) transceivers 13a and 13b (communication sections), and a GW 20 including a relay processing circuit 21, are connected to achieve a function as a relay apparatus. The relay processing circuit 21 just performs determination of the necessity or non-necessity of relay and the identification of a relay destination on the basis of information stored in an EEPROM (Electrically Erasable and Programmable Read Only Memory) 24, and has neither the power supply circuit nor the CAN transceivers. When the relay processing circuit 21 is connected to the ECU 10, power is fed from the power supply circuit 12 to the relay processing circuit 21, and the relay processing circuit 21 transmits/receives signals relayed by the plurality of CAN transceivers 13a and 13b which are included in the ECU 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a relay device that relays data transmission / reception between control devices in an in-vehicle communication system. In particular, a relay system that can be realized as a relay system that performs a relay process using a control device and a relay device that can be added to the control device as an expansion device, and can reduce the line and weight of the entire in-vehicle communication system. The present invention relates to a relay device and a control device that constitute the relay system.

  In recent years, systems in which functions are assigned to a plurality of control devices, communication means are provided in each control device to exchange data with each other, and various processes are performed in cooperation have been used in various fields. Particularly in the field of vehicles, control shifts from mechanical control to electrical control, ECUs (Electronic Control Units) are arranged in the vehicle as a number of control devices, and each ECU is a CAN (Controller Area Network), LIN (Local In general, a configuration is used in which information is mutually exchanged via a network according to a protocol such as Interconnect Network) or FlexRay, and various processes are performed in cooperation and cooperation.

  The number of ECUs mounted on the vehicle increases because the functions of the vehicle realized by electrical control are increasing. In a communication system in which processing is performed in cooperation with a plurality of control devices as well as a system including an ECU mounted on a vehicle, failure and bugs can be realized by distributing the processing units divided into each control device. When a problem such as the above occurs, there is a case where the device is devised to improve the development efficiency and maintainability by facilitating isolation and handling. As described above, the number of control devices included as communication devices in the communication system increases, and the amount of data transmitted and received for cooperation / cooperation between the control devices tends to increase.

  When communication devices are connected to a communication line, the number of communication devices connected to one communication line is limited for delay time, reflection avoidance, ringing prevention, and the like. For example, in the case of a CAN widely used as an in-vehicle network, a maximum of 30 units can be connected to a high speed CAN bus according to the standard, but in practice, operation is limited to a dozen or more units. .

  Although the number of communication devices included in a communication system is increasing, the number of communication devices connected to one communication line is limited. Therefore, the communication devices are divided into a plurality of groups, and the communication lines are divided into groups. In some cases, different communication lines are connected and relayed by a relay device (gateway device). In this case, the number of communication lines increases as the number of communication devices increases. However, particularly in the field of vehicles, weight reduction of the entire vehicle is an important issue in consideration of improvement in fuel consumption and environmental impact. The weight reduction is most affected by the weight reduction of the harness itself including various electric wires such as a communication line and a power supply line. Therefore, the weight reduction of the various electric wires themselves and the line saving in the in-vehicle communication system are desired. Further, in order to secure the vehicle interior space as much as possible and improve the comfort, the space for the installation location of the ECU and the relay device is limited.

  Patent Document 1 proposes an electronic component built-in connector in which an electronic component is built in the harness connector itself and can be handled in the same manner as a general connector, and the electronic component housing and connector can be miniaturized. Yes.

JP 2008-226809 A

  FIG. 4 is a configuration diagram schematically showing the configuration of a control device having a relay device and communication means in a conventional communication system. As shown in FIG. 4, ECUs 1, 1,... That are control devices are connected to different communication lines 3a, 3b, and transmission / reception is relayed between the communication lines 3a, 3b by a GW 9 that is a relay device.

  Thus, in a communication system, when it is necessary to connect a control apparatus to a different communication line, a relay apparatus relays between communication lines. When the control device and the relay device are separately configured as devices that are physically separated as shown in FIG. 4, it is wasteful to arrange them in a limited space.

  Therefore, as proposed in Patent Document 1, an electronic component that realizes the function of the relay device can be incorporated in the connector. However, the relay device has a plurality of transceivers (transmitter / receivers) to perform transmission / reception between different communication lines. ) Is used. In the configuration built in the connector, these communication resources still need to be provided in the control device and the relay device, respectively. Some network controllers used by the control device and the relay device for communication can communicate using a plurality of transceivers. Communication including a control device connected to one communication line in a configuration in which each communication device has its own transceiver and a relay device also has a plurality of transceivers, despite the configuration in which transmission / reception is possible on a plurality of communication lines. It is difficult to reduce the number of devices, and communication resources cannot be saved.

  Further, as shown in FIG. 4, when the control device and the relay device are respectively configured as different devices, both are provided with a power supply circuit so as to receive power from the alternator or the battery. Since the elements constituting the power supply circuit are heavier and larger in size than the other elements, the configuration in which each apparatus is provided with the power supply circuit and is housed does not have the effect of reducing the size and weight.

  The present invention has been made in view of such circumstances, and has a configuration in which a relay device that realizes only a relay function can be connected to a control device to operate as a single unit. It is an object of the present invention to provide a relay system that can be realized, and a relay device and a control device that constitute the relay system.

  A relay system according to a first invention includes a plurality of communication units connected to different communication lines, a processor that inputs and outputs signals and executes signal processing, and each component that includes power supply from the outside and includes the communication unit and the processor A control device having a power supply circuit for outputting a voltage to the control unit and controlling a control target based on a signal transmitted / received by the communication unit by processing of the processor, and connected to the control device for transmission / reception A relay device having a relay processing circuit that performs a process for determining whether a signal to be relayed is necessary and a process for specifying a relay destination, and the relay device is operated by power output from the power supply circuit of the control device. The relay processing circuit is connected to the plurality of communication units and the processor included in the control device via the connector.

  The relay system according to a second aspect of the present invention is the relay system according to the first aspect, wherein the control device detects the presence / absence of connection of the relay device, and the processor and the plurality of communications according to the presence / absence of connection detected by the means. And a means for switching the connection between the processor and the relay processing circuit of the relay device, or the connection between the processor and any one of the plurality of communication units.

A relay system according to a third aspect of the present invention includes a plurality of transceivers to which different communication lines are connected, a microcomputer for performing signal processing by inputting and outputting signals, and an external power supply, the transceiver and the microcomputer A power supply circuit that outputs power to each component including
A control device configured to control an object to be controlled based on a signal transmitted and received by the transceiver by the processing of the microcomputer, a connector for the control device, a memory for storing signal identification information in advance, and Based on the signal identification information stored in the memory, a relay processing circuit that performs processing for determining whether or not to relay an input signal and processing for specifying a relay destination, and outputs a signal to the relay destination when it is determined that relay is necessary A relay device having a circuit board different from the circuit board, wherein the control device is configured such that a power supply line from the power supply circuit is connected to the connector, and an output signal from the microcomputer is transmitted to the connector. Any one of the input signals from the connector is input to the microcomputer, and the output signals from the plurality of communication units are input. Is provided to the connector, and a plurality of output signals from the relay processing circuit via the connector are respectively provided to the plurality of communication units, and the relay device supplies the signal from the connector to the relay processing circuit. It is characterized in that it is inputted and the output from the relay processing circuit is given to the connector.

  A relay device according to a fourth aspect of the present invention is a relay device including a relay processing circuit that determines whether or not data indicated by a transmitted / received signal is to be relayed and specifies a relay destination, and includes power output from an external device And a connector having a plurality of sets of input / output terminals for inputting / outputting input / output signals from / to an external device, and the relay processing circuit uses power input at the power terminals of the connector. It is configured to perform the determination of the necessity of relay and the specification process of the relay destination for the signal input from any of the plurality of input / output terminal sets, and if it is determined that the relay is necessary, it is specified. A signal is output to a set of connection terminals corresponding to the relay destination.

  A control device according to a fifth aspect of the present invention includes a plurality of communication units connected to different communication lines, a processor for executing signal processing by inputting / outputting signals transmitted / received by one of the plurality of communication units, and power supply from outside And a power supply circuit that outputs power to each component including the communication unit and the processor, and is a control device configured to control a control target by processing of the processor, wherein power from the power supply circuit is obtained. An output power terminal; an input / output terminal for inputting / outputting an input / output signal of the processor; a connection terminal for inputting / outputting a transmission / reception signal of each of the plurality of communication units; Means for switching the connection between the input / output terminal and the connection terminal and an external device or the connection between the processor and any one of the plurality of communication units according to the presence or absence of a connection detected by the means Characterized in that it comprises a.

  In the present invention, the relay system is integrally configured by connecting a relay device including a relay processing circuit for performing relay processing to a control device including a processor such as a microcomputer for performing signal processing. The control device includes a communication unit connected to a power supply circuit and a plurality of communication lines, and can independently perform signal processing on signals transmitted and received by any one of the communication units. On the other hand, the relay device does not have a power supply circuit and a communication unit that transmits and receives signals to be relayed. When the relay device and the control device are connected, the relay device is configured to be supplied with power from the power supply circuit of the control device. The relay processing circuit is configured such that input / output signals from the processor of the connected control device and input / output signals corresponding to transmission / reception signals from a plurality of communication units are input / output. Relay processing is performed on the output signal. In other words, the relay processing circuit determines whether or not to relay a signal input from a processor of a connected control device or a plurality of communication units, that is, a received signal, and specifies a relay destination. A signal is output to either a processor corresponding to the above or a plurality of communication units.

  As a result, the function as a relay device that performs relay processing in the communication system is realized by a configuration in which the relay device is incorporated in the control device, and reduces the communication line between the conventional relay device and the control device that existed separately. The relay device can be downsized. Note that the signal processing by the processor in the control device may have the same configuration as the conventional one regardless of whether the signal is transmitted / received via the relay device or directly transmitted / received via the communication unit.

  In the present invention, the control device detects whether the relay device is connected. When the relay device is connected, the control device is configured so that input / output from the processor and input / output to / from multiple communication units are all connected to the relay device, and the relay device is not connected. The input / output from the processor is directly connected to one of a plurality of communication units.

  When a relay device is connected to the control device, the relay processing circuit operates by supplying power from the power supply circuit of the control device. The output from the processor is input to the relay processing circuit and processed by the relay processing circuit to be transmitted by the communication unit corresponding to the transmission destination. A signal received by one of the plurality of communication units and determined by the relay processing circuit to be relayed to the control device is input to the processor. Similarly, a signal received by one of a plurality of communication units and determined by the relay processing circuit to be relayed to another device is input to the communication unit corresponding to the relay destination device, and is transmitted from the communication unit to the relay destination. Sent to. When the relay device is not connected to the control device, the processor and one communication unit are directly connected.

  Thereby, even when the relay device is not connected, the control device can operate independently as a device that controls a control target based on a signal transmitted and received by one communication unit.

  According to the present invention, since the number of communication lines between the relay device and the control device can be reduced, the communication system can be reduced in line weight and weight, and the relay device can be reduced in size. Thus, the entire communication system can be reduced in size and weight.

  When the communication system is applied to a communication system between ECUs installed in a vehicle, the communication system can be reduced in line weight and weight, so that the fuel consumption of the vehicle can be improved and the environment is taken into consideration. It is possible to realize a vehicle that has been damaged.

It is a block diagram which shows the structure of the communication system in this Embodiment. 2 is a schematic perspective view schematically showing an external appearance of an ECU and an internal structure of a connected GW in the present embodiment. FIG. It is a block diagram of ECU in this Embodiment and GW connected. It is a block diagram which shows typically the structure of the control apparatus which has a relay apparatus and communication means in the conventional communication system.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. In the embodiment described below, a case where the relay system according to the present invention is realized as a relay device in an in-vehicle LAN mounted on a vehicle will be described as an example.

  FIG. 1 is a configuration diagram showing a configuration of a communication system in the present embodiment. The communication system is an in-vehicle LAN mounted on a vehicle, and includes an ECU 10, ECUs 1, 1,... And CAN buses 3a, 3b to which the ECUs 1, 1,. ECUs other than the ECUs 1 and 1 shown in FIG. 1, actuators, sensors, or the like may be connected to the communication lines 3a and 3b.

  The ECU 10 and the ECUs 1, 1,... Transmit data including numerical information of various physical quantities such as measured values, calculated values, control values, or control by a microcomputer (hereinafter referred to as a microcomputer) such as an engine and a brake. It is a control device. For example, the ECU 1 functions as an ABS (Antilock Brake System), is connected to a sensor (not shown) that detects the rotational speed (wheel speed) of the wheel, and is based on a measured value of the wheel speed detected through the sensor during braking of the vehicle. The brake is controlled and data including wheel speed measurement values is transmitted to the other.

  In addition to the function as a control device, the ECU 10 also realizes a relay function for relaying data transmission / reception between the ECUs 1, 1,... Connected to different CAN buses 3a, 3b. The ECU 10 is configured as a relay device to which the GW 20 for realizing the relay function is connected. In addition, ECU10,1,1, ... transmits / receives data by a CAN protocol.

  FIG. 2 is a schematic perspective view schematically showing the appearance of the ECU 10 and the internal structure of the connected GW 20 in the present embodiment, and FIG. 3 is a block diagram of the ECU 10 and the connected GW 20. The ECU 10 is housed in a substantially rectangular parallelepiped housing 19 having a connector 18, and includes a microcomputer 11, a power supply circuit 12, two CAN transceivers 13 a and 13 b, and switching units 14, 15, 16 and 17. Composed. The GW 20 has a relay processing circuit 21, crystal resonators 22 and 23, and an EEPROM (Electrically Erasable and Programmable Read Only Memory) 24 mounted on a substrate 25 and a connector 26. The GW 20 may also have a cover as shown by a two-dot chain line. Further, the casing 19 of the ECU 10 may be configured with an opening corresponding to the capacity of the GW 20 in consideration of the GW 20 to be connected.

  The ECU 10 functions as a relay device when the connector 26 of the GW 20 is connected to the connector 18, but when the GW 20 is not connected, the control device that performs only the same operation as the ECUs 1, 1,. Function as.

  The microcomputer 11 includes a u_ctx terminal, a u_crx terminal, a cstb2 terminal, and a u_sleep_req terminal. The microcomputer 11 outputs a CAN transmission signal from the u_ctx terminal and inputs a CAN reception signal from the u_crx terminal. The microcomputer 11 outputs a standby signal instructing standby to the CAN transceiver 13a used for its own transmission / reception from the cstb2 terminal, and outputs a signal requesting the transition to the sleep state from the u_sleep_req terminal to the GW 20.

  The power supply circuit 12 generates and outputs an output voltage to each component by power feeding from a power supply device in the vehicle. The power supply circuit 12 outputs a signal obtained by converting the output voltage from the battery or the ignition to 5V, not only to each component in the ECU 10, but also from the VCC terminal. It also has a GND terminal that is the same as the ground line. From the power supply circuit 12, a signal obtained by converting the signal from the ignition switch to 5V is output from the IG terminal, and a signal obtained by converting the signal to the accessory by 5V is output from the ACC terminal. Further, when the reset signal is output from the reset terminal from the power supply circuit 12 and the reset signal is turned on, the circuit receiving the output signal is restarted.

  The CAN transceivers 13a and 13b are connected to the CAN buses 3a and 3b, respectively, and realize transmission and reception of differential signals to and from the CAN_H and CAN_L lines of the CAN buses 3a and 3b. The CAN transceiver 13a includes a ctx0 terminal for inputting a CAN transmission signal, a crx0 terminal for outputting a reception signal, and a cstb0 terminal for inputting a standby signal. Similarly, the CAN transceiver 13b includes a ctx1 terminal, a crx1 terminal, and a cstb1 terminal.

  U_ctx terminal, u_crx terminal and u_sleep_req terminal of the microcomputer 11, VCC terminal, GND terminal, IG terminal, ACC terminal and reset terminal of the power supply circuit, a set of ctx0 terminal, crx0 terminal and cstb0 terminal of the CAN transceiver 13a, and the CAN transceiver 13b All sets of the ctx1 terminal, the crx1 terminal, and the cstb1 terminal are led to respective terminals (pins) included in the connector 18 connected to the connector 26 of the GW 20. Therefore, when the GW 20 is connected, the output voltage from the power supply circuit 12, the input / output signals of the microcomputer 11, and the input / output signals from the CAN transceivers 13a and 13b are all supplied to the GW 20.

  ECU10 switches the connection between each component part in the state in which GW20 is connected by switching part 14,15,16,17, and the connection in the state in which GW20 is not connected. The switching unit 14 turns on / off the connection between the u_ctx terminal that outputs the CAN transmission signal of the microcomputer 11 and the ctx0 terminal for the transmission signal of the CAN transceiver 13a. The switching unit 15 turns on / off the connection between the crx1 terminal for the reception signal of the CAN transceiver 13a and the u_crx terminal for inputting the CAN reception signal of the microcomputer 11. The switching unit 16 turns on / off the connection between the cstb2 terminal that outputs the standby signal from the microcomputer 11 and the cstb0 terminal that inputs the standby signal of the CAN transceiver 13a.

  The switching units 14, 15, and 16 are configured so that the connection is turned off when the connector 26 of the GW 20 is connected to the connector 18, and the connection is turned on when the connector 18 is not connected. Whether or not the connector 26 of the GW 20 is connected to the connector 18 is determined by detecting whether or not the connector 18 is energized in the microcomputer 11 or other specific circuit. It is assumed that a detection signal “High” is output when it is connected and “Low” is output when it is not connected, and the detection signal is input to the switching units 14, 15, 16, and 17.

  The switching unit 17 of the ECU 10 inputs a branch of the VCC signal input from the outside to the power supply circuit 12. When it is detected that the connector 26 of the GW 20 is connected to the connector 18, the specific part of the microcomputer 11 is selected. The signal level to the terminal input to the pin is set to “High”. The microcomputer 11 recognizes that the standby signal from the cstb2 can be output while the signal level input to the specific pin is “High”.

  The relay processing circuit 21 of the GW 20 is configured by an ASIC (Application Specific Integrated Circuit) or a microcomputer. The relay processing circuit 21 operates on the basis of clock signals from the crystal resonators 22 and 23 by power supply from the outside. The quartz vibrators 22 and 23 have different frequencies. For example, the crystal oscillator 22 outputs a clock signal of 16 MHz, and the crystal oscillator 23 outputs a clock signal of 32 KHz. The relay processing circuit 21 determines whether relaying is necessary and specifies the relay destination based on the CANID included in the CAN transmission / reception signal that needs to be relayed and stored in advance in the EEPROM 24 and the output destination corresponding to each relay destination. Configured to do.

  The relay processing circuit 21 is configured to realize only a relay function such as necessity of relay and identification of a relay destination, and functions necessary as a relay device in an in-vehicle communication system, for example, communication of CAN buses 3a and 3b. A management function such as detection of abnormality, or a diagnostic function such as storage of data to be transmitted / received and abnormality detection based on the data transmitted / received is configured to be realized by the microcomputer 11 of the ECU 10.

  The GW 20 does not include a power supply circuit or a CAN transceiver, and cannot function as a relay device by itself. The connector 26 of the GW 20 is provided with a large number of terminals connected to the relay processing circuit 21, and signals are input / output from the respective terminals to the relay processing circuit 21. Specifically, the connector 26 includes a terminal for inputting a VCC signal, a GND terminal, an IG terminal for inputting a signal from an ignition switch, an ACC terminal for inputting an ACC signal, and a reset terminal for inputting a reset signal. When the connector 26 is connected to the connector 18 of the ECU 10, the power supply circuit 12 is connected to the VCC terminal, the GND terminal, the IG terminal, the ACC terminal, and the reset terminal. Further, a terminal for receiving a plurality of sets of CAN transmission / reception signals and standby signals is provided. When the connector 26 is connected to the connector 18 of the ECU 10, the u_ctx terminal, the u_crx terminal, the u_sleep_req terminal of the microcomputer 11, and the CAN The ctx0 terminal, crx0 terminal, and cstb0 terminal of the transceiver 13a are connected to the ctx1 terminal, crx1 terminal, and cstb1 terminal of the CAN transceiver 13b. The connection with each terminal of the microcomputer, the connection with each terminal of the CAN transceiver 13a, and the connection with each terminal of the CAN transceiver 13b are recognized as a set, and the connection with each terminal of the CAN transceiver 13a. The connection to each terminal of the CAN transceiver 13b is identifiable as a bus corresponding to a different CAN bus 3a, 3b. The relay processing circuit 21 identifies the set of terminals of the CAN transceiver 13a connected to the CAN bus 3a as “0” and the other as “1”.

  While the connector 26 of the GW 20 is connected to the connector 18 of the ECU 10, the crystal oscillator 23 on the low speed side is connected to the VCC terminal and the GND terminal of the power supply circuit 12, and always oscillates while power is supplied to the power supply circuit 12. It is like that. In the GW 20, based on the signal levels of the IG terminal and the ACC terminal of the power supply circuit 12 of the ECU 10, control is performed so that power is supplied to the high-speed side crystal unit 22 when the ignition key is on or accessory is on. It is like that. Even when the connector 26 of the GW 20 is connected to the connector 18 of the ECU 10, if the ignition key position is off and the accessory is also off on the GW 20, power supply to the high-speed side crystal unit 22 is stopped. However, the operation is performed based on the clock signal from the crystal unit 23 on the low speed side. This is to prevent the battery from running out.

  While the connector 26 of the GW 20 is connected to the connector 18 of the ECU 10, the relay processing circuit 21 is configured to be fed by the power supply circuit 12 of the ECU 10 and execute the relay processing. Specifically, when the CAN transmission signal from the u_ctx terminal of the microcomputer 11 is input via the connectors 18 and 26, the relay processing circuit 21 determines which signal is transmitted to the CAN transceivers 13a and 13b by CANID. The CAN transmission signal is output to either the ctx0 terminal of the CAN transceiver 13a or the ctx1 terminal of the CAN transceiver 13b according to the determination result. When the CAN reception signal output from the crx0 terminal included in the set identified as “0” when the CAN transceiver 13 a receives the signal is input to the relay processing circuit 21, the CANID of the CAN reception signal is the EEPROM 24. If it is stored, it is determined that relay is necessary, and if it is not stored, it is determined that relay is not necessary. When the relay processing circuit 21 determines that the relay is necessary, the relay processing circuit 21 reads the relay destination stored in association with the CANID stored in the EEPROM 24, that is, the identification number “0” or “1” of the CAN buses 3a and 3b. A CAN reception signal is output to the bus side identified by the read identification number. In this case, the received signal is output to the ctx1 terminal of the set of CAN transceivers 13b identified as “1”. At this time, the CAN reception signal is also output to the u_crx terminal of the microcomputer 11 of the ECU 10.

  As described above, the GW 20 is configured as an add-on device that does not include the power supply circuit and the CAN transceiver but includes only the relay processing circuit 21 that realizes the relay function, the crystal resonators 22 and 23, and the EEPROM 24. By connecting as an additional device to an arbitrary ECU provided with a terminal for outputting each signal to the GW 20 like the ECU 10, any device can exhibit a relay function. At this time, the system can be made smaller and lighter than a configuration in which the communication system includes a relay device having a power supply circuit and communication resources only for the relay function.

  Further, the ECU 10 detects whether the GW 20 is connected. When the GW 20 is not connected, the microcomputer 11 and the CAN transceiver 13a are directly connected by the switching units 14, 15, 16, and 17. Thus, the ECU 10 can operate independently as an ECU (control device). Thus, by providing a plurality of ECUs having the configuration of the ECU 10 in the communication system, it is possible to select an ECU that also connects the GW 20 to realize the relay function, and to flexibly change the configuration of the communication system. Is also possible and has an excellent effect.

  In the present embodiment, a description will be given assuming that the GW 20 is connected to the ECU 10 by connectors 18 and 26 as shown in FIG. However, the present invention is not limited to this, and the substrate 25 of the GW 20 may be stacked on the substrate of the ECU 10. In this case, the conductors need to be printed on the board of the ECU 10 so that each terminal of the relay processing circuit 21 configured as an ASIC is directly connected to each terminal in the ECU 10 regardless of the connector 26. is there.

  The disclosed embodiments should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 ECU
10 ECU (control device)
11 Microcomputer (processor, microcomputer)
12 Power supply circuit 13a, 13b CAN transceiver (communication unit)
14, 15, 16, 17 switching unit (detection means)
20 GW (relay device)
21 Relay processing circuit 24 EEPROM (memory)
26 Connector

Claims (5)

Multiple communication units connected to different communication lines,
A processor that performs signal processing by inputting and outputting signals; and
A power supply circuit that is powered from the outside and outputs a voltage to each component including the communication unit and the processor;
A control device configured to control a control target based on a signal transmitted and received by the communication unit by processing of the processor;
Connected to the control device,
A relay device having a relay processing circuit that performs a process for determining whether or not to relay a signal to be transmitted and received and a process for specifying a relay destination,
The relay device
It is designed to operate with power output from the power supply circuit of the control device,
The relay system, wherein the relay processing circuit is connected to the plurality of communication units and the processor included in the control device via the connector. The control device includes:
Means for detecting the presence or absence of connection of the relay device;
Connection between the processor and the plurality of communication units and the relay processing circuit of the relay device, or connection between the processor and any one of the plurality of communication units, depending on the presence or absence of connection detected by the means The relay system according to claim 1, further comprising: means for switching between. A plurality of transmitters / receivers to which different communication lines are connected, a microcomputer for inputting / outputting signals to perform signal processing, and a power supply from the outside, and outputting power to each component including the transmitter / receiver and the microcomputer Having a power circuit on the board,
A control device configured to control a control target based on a signal transmitted and received by the transceiver by the processing of the microcomputer;
A connector with the control device,
Based on the memory in which the signal identification information is stored in advance and the signal identification information stored in the memory, the input signal relay necessity determination process and the relay destination identification process are performed, and it is determined that the relay is necessary. A relay processing circuit that outputs a signal to a relay destination in a case on a board different from the board, and
In the control device,
A power supply line from the power supply circuit is connected to the connector;
An output signal from the microcomputer is given to the connector, and any one of the input signals from the connector is inputted to the microcomputer,
The output signals from the plurality of communication units are provided to the connector, and the plurality of output signals from the relay processing circuit via the connector are respectively provided to the plurality of communication units,
The relay device is
A relay system, wherein a signal from the connector is input to a relay processing circuit, and an output from the relay processing circuit is provided to the connector. A relay device including a relay processing circuit that performs determination of whether or not to relay data indicated by a transmitted / received signal and processing for specifying a relay destination,
A connector having a plurality of sets of a power terminal for inputting power output from the external device and an input / output terminal for inputting / outputting an input / output signal from the external device;
The relay processing circuit includes:
It is designed to operate with power input at the power terminal of the connector,
A connection terminal corresponding to the specified relay destination when the relay input necessity determination and the relay destination specifying process are performed on a signal input from any of the plurality of input / output terminal sets, and the relay destination is specified. A relay device characterized in that a signal is output to the set of. A plurality of communication units connected to different communication lines, a processor for executing signal processing by inputting / outputting signals transmitted / received by one of the plurality of communication units, and an external power supply, including the communication unit and the processor A control device having a power supply circuit that outputs power to each component, and controlling a control target by processing of the processor,
A power terminal for outputting power from the power supply circuit;
An input / output terminal for inputting / outputting an input / output signal of the processor;
A connection terminal for inputting / outputting a transmission / reception signal of each of the plurality of communication units;
Means for detecting whether or not an external device is connected;
Means for switching the connection between the input / output terminal and the connection terminal and an external device, or the connection between the processor and any one of the plurality of communication units, depending on the presence or absence of a connection detected by the means. A control device characterized by that.

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