JPH03114332A - Diagnostic system for loop constitution multiplex transmission system - Google Patents

Abstract

PURPOSE:To eliminate the need for a skilled operator by driving a diagnostic program in response to a diagnostic command from an external equipment, returning response as a result and confirming the operation for each command. CONSTITUTION:A diagnostic program 2a is provided on one among nodes 2-4 and a diagnostic driver unit 1 is provided externally to drive the program 2a and the diagnostic driver unit 1 is connected in the diagnostic mode. Thus, the diagnostic program 2a is driven to a diagnosing command from the diagnostic driver unit 1, a response is returned as the result and the operation is confirmed at every command. Thus, the discrimination is implemented easily depending on the content of response and the skilled operator is not called for.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a loop configuration multiplex transmission control system for automobiles, which incorporates a diagnosis function into a part of the nodes, drives the function from the outside, A sensor that drives the diagnosis function with an external device and is connected on the loop.

The present invention relates to a diagnostic method for a loop-configured multiplex transmission control system suitable for vehicle use, which enables abnormality detection of objects such as actuators.

[Prior art]

Vehicles equipped with a loop-configured multiplex transmission control system are currently being announced at the test level, but if a car equipped with this loop-configured multiplex transmission control system goes on the market in the future, diagnosis will be one of the important functions. ing.

The connection method for diagnosis at the test level is as follows:
The diagnosis unit 75 is provided as shown in FIG. In some cases, a connector 72a exclusively for diagnosis is provided in the section, and the diagnosis unit 74 is connected to the connector 72a.

The method of diagnosis is diagnosis
The signals obtained by the unit are output to a display with many lines arranged, or a display with a reduced number of displays by combining them, and an operator makes a judgment as to whether it is normal or abnormal, or a large-scale system that incorporates artificial intelligence (AI). Automatic judgment was carried out using a system.

[Problem to be solved by the invention]

However, when the cable is removed and the diagnosis unit is connected between the cables, it takes a long time to connect, and there are problems such as a decrease in reliability due to the connection part being damaged.

Furthermore, the method of using a dedicated connector for a part of the node is easy and has no problems with reliability. However, in the current diagnosis method, the diagnosis unit connected to the connector uses a display method that displays the obtained signals all at once, so the unit becomes too large.

Furthermore, displays with multiple displays for miniaturization are difficult to see and can be easily misunderstood. Since only the detailed status is displayed, there is a problem in that the operator is required to be highly skilled in order to determine whether the system is normal or abnormal.

When configuring a system with a loop compared to the conventional system configuration, the system becomes complicated and the INPUT side, 0UTP
It is difficult to judge whether there is an abnormality on the UT side or on the system side making up the loop, and the current situation is that there is no equipment that can make a clear judgment.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a diagnosis method for a loop-configured multiplex transmission system that eliminates the above-mentioned problems, does not require operator skill, and has a simple system configuration. .

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a system for monitoring and analyzing the status of each electrical equipment connected to the nodes on the loop in a loop configuration multiplex transmission control system for in-vehicle use. In order to drive the diagnosis program, there is a means to put the node side into a diagnosis state by operating one of the switches inside the vehicle and the engine key, and a means for putting the node side into the diagnosis state by operating the engine key and a means for driving the diagnosis program. A diagnosis unit that drives the program is provided, and the diagnosis unit includes a processing section that processes signals, an output display section that outputs and displays the contents of the sent signal, a key input section for inputting commands, Equipped with an operation section for operations and a connection section for connecting to nodes, external devices and nodes are connected, and each electrical device on the loop can be continuously checked using a group of commands that are preset to the external device. Each electrical device on the loop can be checked individually according to the individual commands that make up the program, and depending on the situation, it is possible to create a diagnosis program. The feature is that the output is displayed on the top.

[Function] To diagnose a loop-configured multiplex transmission system as described above, one of the nodes has a diagnosis program, and an external diagnosis driver unit is provided to drive the program. By using a configuration in which the diagnosis driver unit is connected, the diagnosis program is driven in response to the diagnosis command from the diagnosis driver unit, and a response is returned as a result, making it possible to confirm the operation of each command. .

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a block diagram showing the configuration of a loop-configured multiplex transmission control system using the diagnosis system according to the present invention. Then, a boat 2b for connecting the diagnosis program 2a and the diagnosis driver unit 1 is provided in the node 2), and the diagnosis driver unit 1 is connected to the boat 2b.

The diagnosis program 2a exchanges information between devices connected to each node through a loop according to instructions from the diagnosis driver unit 1, and also performs diagnosis.

The diagnosis driver unit 1 has an external appearance as shown in FIG. 3, and as shown in the figure, it has a connection section 1-1 for connecting with nodes, a display section 1-2 for displaying various displays, and a display section 1-2 for starting and stopping diagnosis, etc. Operation unit 1-3 for controlling.
It consists of a control section 1-4 for controlling the entire unit and a key input section 1-5 consisting of alphanumeric characters. In addition, the operation section 1
-3 is start button 1-3-1, stop button 1-3-2,
It has a clear button 1-3-3, steps 1-3-4, and set button 1-3-5.

This diagnosis method first connects a node (node 2 in FIG. 2) having a diagnosis program on the loop, and then puts the loop-side system into a diagnosis state. In this state, commands from the diagnosis driver unit 1 can be accepted.

On the other hand, on the diagnosis driver unit 1 side, a command is set on the display section 1-2 from the key input section 1-5. The command set on the display section 1-2 is transferred to the node by pressing the start button 1-3-1 on the operation section 1-3. The node that receives this command sends and receives signals to and from each device and executes diagnosis.

Normal (OK), error 1 with the above result as a response
(NG) is returned to the diagnosis driver unit 1. It is also possible to return the diagnosis details as a response.

FIG. 1 is a block diagram showing the configuration of a control section of a diagnosis driver unit 1 constituting a diagnosis system according to the present invention. The control unit 1-4 includes a program storage unit 1 centered around a microprocessor 1-4-1.
-4-2, a data storage section 1-4-3, a communication port with the node 1-4-4, a character generation section 1-4-5, and a key manual control section 1-4-6. The character generating section 1-4-5 is read by a display section 1-2, and the key manual control section 1-4-6 is read by a key input section 1-5.

The operating procedure when using the diagnosis system having the above configuration is shown in FIGS. 4 and 5. The operating procedure will be explained below with reference to FIGS. 1 and 3. FIG. 4 is a flowchart showing the operating procedure in accordance with instructions programmed in the diagnosis driver unit 1 in advance. In the figure, first, in order to put the loop side into a diagnosis preparation state (step 101), a specific switch (any switch in the car) is put in a diagnosis preparation state by a combination of the engine key (step 102). On the other hand, the diagnosis driver unit side is also brought into a ready state (step 103) to enable program selection. In FIG. 4, the ROM
This shows the operation when the stored program or a newly programmed program cannot be stored in the storage unit. A new program is created using the operation section 1-3 and the key input section 1-5.

The contents programmed in the key input section 1-5 are displayed on the display section 1-
2. To start a program, first enter the program name, then enter the command. Finally, set the CR (carriage) and the process is complete.

The above operation only sets the program to the display section 1-2, so it is stored in the program storage section 1-4-2.
To store the data, press the set button 1-3-5.

To execute a program, select the program using the key input unit 1-5 (step 104) and press the start button 1-3-1 (step 105). When the start type 1-3-1 is pressed, a command is sent (step 106), and the process waits for a response (step 107).

Next, whether the response is an abnormal response (NG) or a normal response (OK)
If the response is abnormal, the command number (for example, NO,
25) and NG are displayed (step 111). If the response is a normal response, it is checked whether all commands have been sent out (step 109); if not, the above operations are repeated from command sending. When all commands have been sent, for example, OK END is displayed on the display unit 1-2 as a normal termination instruction (step 110).

This method of automatic command sending also relies on operator operation.
Transmission is possible in steps. After selecting the program,
Normally, the start type 1-3-1 is pressed, but in this case, the step type 1-3-4 is pressed. When step type 1-3-4 is pressed, one command is sent out one by one,
The series of operations described above is repeated. If you want to stop sending a command midway through, press the stop button 1-3-2 to prohibit sending the next command and end the process. Furthermore, if an abnormality occurs during the operation of the diagnosis system, the diagnosis driver unit 1 can be returned to the ready state by pressing the clear button 1-3-3.

FIG. 5 is a flowchart showing the operating procedure when executing one command at a time. First, in order to bring the loop side into a diagnosis preparation state (step 201), a combination of a specific switch and the engine key is used to bring the loop side into a diagnosis state (step 202). On the other hand, the Diagnosis Driver Unit 1 side is also set to the ready state in Step 2.
03), enables program set. As mentioned above, the program sets a command by operating the key input section 1-5 (step 204), the command is sent by pressing the start type 1-3-1 (step 206), and the command is sent by pressing the start type 1-3-1. As a result, the transmission is completed and a response is awaited (step 207). If the response is an abnormal response (NG), command numbers NO,
o is displayed on the display section 1-2 (step 207).

FIG. 6 is a flowchart showing an example of the operation as a program example, in which (A) shows a lamp check using a lamp check command (FF), and (B) shows an individual lamp check. FIG. 7 shows an example of a lamp check command (FF).

When the operational example shown in FIG. 6 corresponds to the operational procedure shown in FIG. 4, the result is as follows. Program creation is done through key input section 1-
01CR, 02CR sequentially from 5.

Enter 03CR, 04RC, 05CR and press set button 1-
3-5 is pressed to store it in the storage section (step 301).

By repeating the above operations, many programs can be stored.

Next, to execute the lamp check command (FF), use the key input section 1-5 to set the lamp check command (step 301), press start type 1-3-1 (step 302), and the subsequent operations will be performed in the 4th step. The result will be the same as in the figure. That is, a command is sent (step 303
), waits for a response (step 304), then judges whether the response is an abnormal response (NG) or a normal response (OK) (step 305), and if it is an abnormal response, the display section 1-2 NG is displayed on the display unit 1-2 (step 309), and if the response is a normal response, OK is displayed on the display unit 1-2 (step 306). It is checked whether all commands have been sent (step 307), and if not, the above operations are repeated from command sending (step 303). When all commands have been sent, OK END is displayed on the display section 1-2 (step 308).
,finish.

In the case of individual lamp check, as shown in Figure 6(B), program commands are entered in key input sections 1-5, respectively.
In the case of a stop lamp check, set 01CR (step 311) and press start type 1-3-1 (step 312). The subsequent operations are the same as in the case of FIG. That is, the command is sent (step 313) and a response is awaited (step 31).
4) Determine whether the response is normal or abnormal (Step 315)
, if the response is an abnormal response (NG), NG is displayed on the display section 1-
2 (step 318), and the response is a normal response (O
K), OK is displayed on the display section 1-2. Next, in the case of bar/clamp check, set 02CR and press start type 1-3-1. Similarly, the operation is performed up to the turn lamp R in FIG. 7, and the operation is completed.

By configuring the diagnostic system for a loop configuration multiplex transmission system as described above, in a multiplex transmission control system that has recently adopted a loop configuration, the conditions of other nodes are also included regarding input/output correspondence of one node, and the conditions between nodes are also included. Determination of device failures such as loops are becoming more complex, and in this current situation, the proactive diagnostic method described above makes it possible to diagnose electronic devices that are already installed.

In the future, as multiplex transmission control systems with loop configurations become more complex, it is thought that methods that incorporate active diagnosis as described above will be used in various places.

〔Effect of the invention〕

As explained above, according to the present invention, the following excellent effects can be obtained.

(1) A configuration in which one of the nodes that make up the loop has a diagnostic program, and in order to drive the diagnostic program, an external device that drives the diagnostic program is provided outside, and the external device is connected during diagnosis. By taking this, the diagnostic program is activated in response to the diagnostic command from the external device, and a response is returned as a result, making it possible to check the operation of each command, eliminating oversights and mistakes.

(2) Furthermore, since judgment can now be made easily based on the response content, the need for operator skill is eliminated.

(3) In addition, by providing an external device that drives the diagnostic program, it becomes possible to easily create a diagnostic program sequence by judging the situation in addition to the existing program. There is no need to be captured.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the control section of the diagnosis driver unit 1 constituting the diagnosis system according to the present invention, and FIG. 2 is a loop configuration multiplex transmission control system using the diagnosis system according to the present invention. 3 is a diagram showing the external appearance of the diagnosis driver unit, FIG. 4 is a flowchart showing the operating procedure of the diagnosis system according to the set program, and FIG. 5 is a diagram showing the diagnosis system according to the set program. Flowchart showing the operating procedure of the system, FIG. 6(A) is a flowchart showing an example of the operation performed by the lamp check command (FF), and FIG. 6(B) shows the configuration of the flowchart showing an example of the operation performed by the individual lamp check. This is a professional drawing. In the figure, 1...Diagnosis driver unit, 2, 3.4...Node, 2a...Diagnosis program, 1-1...Connection part, 1-2...
...Display section, 1-3...Operation section, 1-4...Control section, 1-5...Key input section, 1-4-1...
Microprocessor, 1-4-2...Program storage unit, 1-4-3...Data storage unit, 1-4-4.
...Communication boat, 1-4-5...Character generation section, 1
-4-6...Key human control section.

Claims (1)

[Scope of Claims] An in-vehicle loop-configured multiplex transmission control system in which a plurality of nodes to which electrical equipment is connected are connected in a loop through a transmission path, and signals are transmitted and received from or between the electrical equipment, Some of the nodes constituting the loop are provided with a diagnostic program for monitoring and analyzing the status of each electrical device connected to the nodes on the loop, and in order to drive the diagnostic program, one of the nodes in the vehicle is provided. A means for putting the node side into a diagnostic state by operating a switch and an engine key, and an external device for driving the diagnostic program are provided. The device is equipped with a display section for outputting and displaying the contents of the device, a print output section for optional connection, a key input section for inputting commands, an operation section for performing operations, and a connection section for connecting to the node. By serially connecting the external device, each electrical device on the loop can be checked continuously using a group of commands set in advance on the external device, and each electrical device on the loop can be checked individually using the individual commands that make up the program. Diagnosis of a loop-configured multiplex transmission system, characterized in that a check is made and a diagnostic program can be created depending on the situation, and when the operation is performed, the result of the check is displayed or printed out on the external device as a response. method.