Bus fault detection system based on handheld instrument

Abstract

The utility model discloses a bus fault detection system based on a handheld instrument, which belongs to the field of bus communication and comprises a communication host, a communication terminal and a handheld fault detection instrument, and the communication host is connected with the communication terminal through a communication bus. On the communication bus, a signal line of the communication host is connected to the input end of the handheld fault detection instrument, and the communication terminal is connected to the output end of the handheld fault detection instrument. According to the utility model, the fault point of the communication fault in the bus network can be rapidly detected, and the fault solving efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of bus communication, and more specifically, to a bus fault detection system based on a handheld instrument. Background Art

[0002] In industrial bus communication, communication faults occur in the communication network, which can be roughly divided into three situations. First, the communication fault of the entire communication network caused by the communication host; second, the fault of a single communication terminal resulting in the inability to communicate normally between the communication host and it; third, due to the loss or interference of communication data during transmission, resulting in the attenuation of communication signals and the loss of communication data, so that some communication terminals in the communication network cannot communicate normally with the communication host. However, in the actual field bus communication network, due to the long bus wiring, complex field environment, and many hanging communication terminals, it is very difficult to quickly and accurately find the cause of the communication fault once a communication fault occurs in the communication network. It is only possible to analyze the cause of the communication fault based on the experience of the debugging personnel, which requires a lot of time to solve the problem and has extremely low efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a bus fault detection system based on a handheld instrument, which solves the problem that it is difficult to quickly detect and locate communication faults in the bus communication network.

[0004] The purpose of the utility model is achieved through the following solutions:

[0005] A bus fault detection system based on a handheld instrument includes:

[0006] A communication host, a communication terminal, and a handheld fault detection instrument, where the communication host and the communication terminal are connected through a communication bus; on the communication bus, the signal line of the communication host is connected to the input end of the handheld fault detection instrument, and the communication terminal is connected to the output end of the handheld fault detection instrument.

[0007] Further, the handheld fault detection instrument can analyze the data of the communication host and the communication terminal.

[0008] Further, it also includes a PC side, and the analyzed data of the communication host and the communication terminal are displayed on the PC side.

[0009] Further, the handheld fault detection instrument also includes a serial port, and the handheld fault detector is connected to the PC side through the serial port.

[0010] Further, the connection of the signal line of the communication host to the input end of the handheld fault detection instrument specifically includes: the input end of the handheld fault detection instrument is connected to the sending query status command port of the communication host.

[0011] Further, the communication terminal is connected to the output end of the handheld fault detector, specifically including: the output end of the handheld fault detector is connected to the query status command data receiving end of the communication terminal.

[0012] Further, the handheld fault detector further includes an analysis unit for analyzing the status code data sent by the communication terminal to the communication host.

[0013] Further, after data analysis, it is displayed on the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

[0014] Further, it is displayed on the display screen of the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

[0015] Further, the PC side has a computer serial port, which is connected to the serial port of the handheld fault detector through the computer serial port.

[0016] Advantages of the present utility model:

[0017] The present utility model can quickly detect the fault points of communication faults in the bus network, greatly improving the efficiency of fault resolution. Description of the drawings

[0018] The following drawings in the description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is the structural block diagram of the present utility model;

[0020] Figure 2 is a schematic diagram for determining whether a fault belongs to the communication host or the communication bus based on the structure of the present utility model;

[0021] Figure 3 is a schematic diagram for determining whether a fault belongs to the communication terminal based on the structure of the present utility model. Specific embodiments

[0022] All features disclosed in all embodiments in this specification, or all features implicitly disclosed, except for mutually exclusive features, can be combined or replaced in any way.

[0023] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following description. Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0024] In view of the problem of how to quickly detect and locate communication faults in the existing bus communication network, the present utility model provides a bus fault detection system based on a handheld instrument, as Figures 1-3 shown, and the implementation principle is described as follows: First, build a bus communication network system, including a communication host and a communication terminal. The communication host and the communication terminal are connected through a communication bus; for a complete and effective communication between the communication host and the communication terminal, taking the query status command as an example: the communication host sends a query status command, and after the communication terminal receives the command, it then sends the status code to the communication host. After the communication host receives the status codes transferred by all communication terminals, it parses them to obtain the status of the communication terminal. A valid communication between the communication host and the communication terminal is completed.

[0025] When in the bus network, the communication host cannot obtain the status information of a certain communication terminal. However, when there is no abnormality in the communication host and the communication terminal in this communication network. Then add the following structure: Connect the signal line of the communication host to the input end of the handheld fault detection instrument, and connect the communication terminal to the output end of the handheld fault detection instrument. The handheld fault detection instrument can parse the data of the communication host and the communication terminal, and at the same time display the parsed data of the communication host and the communication terminal on the PC side. In this way, it can be compared with the correct data to determine whether the data sent by the communication host, transmitted by the communication bus, and returned by the communication terminal are correct, so as to locate the fault. According to the above solution, the fault point of the communication fault in the bus network can be quickly detected, greatly improving the efficiency of fault resolution.

[0026] A more specific description of the connection structure is as follows: When in the built bus network, the communication host cannot obtain the status information of a certain communication terminal, but there is no obvious abnormality in this communication terminal. The debugging personnel can then use a handheld fault detector to locate the fault. Specifically, connect the signal line of the communication host end on the communication bus to the signal input end of the handheld fault detector, connect the signal line of the communication terminal to the signal output end of the handheld fault detector, and then connect the handheld fault detector to the PC through the serial port. After the communication host issues a query status command, it will first pass through the fault detector. After data parsing, it can be seen on the PC side whether the query status command data transmitted by the communication host to this communication terminal through the communication bus is correct. If the data is incorrect, it can be determined that the fault occurs in the communication host or on the communication bus, and further investigation can be carried out. If the data is correct, after the fault detector issues the query status command data to the communication terminal, and the communication terminal receives the command, it then sends the status code to the communication host. Then the fault detector will receive the status code data sent by the communication terminal to the communication host and parse it. After data parsing, it can be seen on the PC side whether the status reply data transmitted by the communication terminal to this communication host through the communication bus is correct. If the status reply data returned by the communication terminal is incorrect, it can be determined that the fault occurs in the communication terminal. If the status reply data returned by the communication terminal is correct, the fault of the communication terminal can be excluded.

[0027] Optionally, in an embodiment of the present invention, a bus fault detection system based on a handheld instrument is provided, including:

[0028] A communication host, a communication terminal, and a handheld fault detector. The communication host and the communication terminal are connected through a communication bus; on the communication bus, the signal line of the communication host is connected to the input end of the handheld fault detector, and the communication terminal is connected to the output end of the handheld fault detector.

[0029] In other embodiments of the present invention, the handheld fault detector can parse the data of the communication host and the communication terminal.

[0030] In other embodiments of the present invention, a PC side is further included, and the parsed data of the communication host and the communication terminal is displayed on the PC side.

[0031] In other embodiments of the present invention, the handheld fault detector further includes a serial port, and the handheld fault detector is connected to the PC side through the serial port.

[0032] In other embodiments of the present invention, the signal line of the communication host is connected to the input end of the handheld fault detector, specifically including: the input end of the handheld fault detector is connected to the query status command port of the communication host.

[0033] In other embodiments of the present utility model, the communication terminal is connected to the output end of the handheld fault detection instrument, specifically including: the output end of the handheld fault detection instrument is connected to the query status command data receiving end of the communication terminal.

[0034] In other embodiments of the present utility model, the handheld fault detection instrument further includes an analysis unit for analyzing the status code data sent by the communication terminal to the communication host.

[0035] In other embodiments of the present utility model, after data analysis, it is displayed on the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

[0036] In other embodiments of the present utility model, it is displayed on the display screen of the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

[0037] In other embodiments of the present utility model, the PC side has a computer serial port and is connected to the serial port of the handheld fault detection through the computer serial port.

[0038] For the remaining technical features in this embodiment, those skilled in the art can flexibly select according to the actual situation to meet different specific actual needs. However, it is obvious to those of ordinary skill in the art that: it is not necessary to adopt these specific details to implement the present utility model. In other instances, in order to avoid confusing the present utility model, well-known components, structures or parts are not specifically described, and all are within the scope of the technical solution claimed in the claims of the present utility model to define the technical protection scope.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" are all in a broad sense, and those skilled in the art should understand them in a broad sense. For example, it can be a fixed connection, a movable connection, or an overall connection, or a partial connection, it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can also be the communication inside two components, etc. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific situation, that is, the expression of the literal language can be flexibly corresponding to the implementation of the actual technology, and the expression of the literal language (including the drawings) of the specification of the present utility model does not constitute any single restrictive interpretation of the claims.

Claims

1. A bus fault detection system based on a handheld instrument, characterized in that, Including: A communication host, a communication terminal, and a handheld fault detection instrument, where the communication host and the communication terminal are connected through a communication bus; On the communication bus, the signal line of the communication host is connected to the input end of the handheld fault detection instrument, and the communication terminal is connected to the output end of the handheld fault detection instrument.

2. The bus fault detection system based on a handheld instrument according to claim 1, wherein The handheld fault detection instrument can analyze the data of the communication host and the communication terminal.

3. The bus fault detection system based on a handheld instrument according to claim 1, characterized in that It further includes a PC side, and the analyzed data of the communication host and the communication terminal are displayed on the PC side.

4. The bus fault detection system based on a handheld instrument according to claim 3, characterized in that, The handheld fault detection instrument further includes a serial port, and the handheld fault detector is connected to the PC side through the serial port.

5. The bus fault detection system based on a handheld instrument according to claim 1, wherein The signal line of the communication host is connected to the input end of the handheld fault detection instrument, specifically including: the input end of the handheld fault detection instrument is connected to the sending query status command port of the communication host.

6. The bus fault detection system based on a handheld instrument according to claim 5, wherein The communication terminal is connected to the output end of the handheld fault detection instrument, specifically including: the output end of the handheld fault detection instrument is connected to the query status command data receiving end of the communication terminal.

7. The bus fault detection system based on a handheld instrument according to claim 1, wherein The handheld fault detection instrument further includes an analysis unit for analyzing the status code data sent by the communication terminal to the communication host.

8. The bus fault detection system based on a handheld instrument according to claim 7, wherein After data analysis, it is displayed on the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

9. The bus fault detection system based on a handheld instrument according to claim 8, wherein, It is displayed on the display screen of the PC side whether the status reply data transmitted by the communication terminal to the communication host through the communication bus is correct.

10. The bus fault detection system based on a handheld instrument according to claim 4, wherein The PC side has a computer serial port and is connected to the serial port of the handheld fault detection through the computer serial port.

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