CN207782829U - The diagnostic device of PROFIBUS-DP communication networks - Google Patents

Abstract

The utility model provides a diagnostic device for a PROFIBUS-DP communication network, which includes: a detector, a master station analyzer electrically connected to the detector, and a storage unit electrically connected to the master station analyzer. The detector is connected to the PROFIBUS‑DP communication network and is used to detect messages and fault voltage values in the communication network. The storage unit is used to store fault diagnosis experience information. The master station analyzer is used to analyze messages and fault voltage values, and compare the analysis results with the fault diagnosis experience information in the storage unit to determine the fault information and/or fault handling information of the PROFIBUS‑DP communication network. The status diagnosis equipment of the communication network in the present utility model utilizes the built-in application storage unit to quickly provide fault information and solutions to on-site inspection and maintenance personnel in real time, greatly reducing the troubleshooting and solution time.

Description

Diagnosis equipment for PROFIBUS-DP communication network

technical field

The utility model relates to the field of network diagnosis, in particular to a diagnosis device for a field bus distributed edge PROFIBUS-DP network.

Background technique

PROFIBUS-DP (PROFIBUS-Decentralized Periphery, fieldbus distributed edge) network, hereinafter referred to as DP network is designed for the decentralized control or automatic control of high-speed equipment. In industrial control, the periodic and aperiodic data exchange, widely used.

However, there are more and more bus failures caused by shielding layer wiring during wiring, substation physical address errors during debugging, electromagnetic interference during equipment operation, or slip rings, repeaters, and DP connectors.

Since the location of the bus fault in the DP network is usually hidden, it is difficult to find it in time on site, and the correlation between the fault location and the fault is poor, the uncertainty of troubleshooting is large, and the processing time is long. In many cases, it is necessary to rely on professional DP detection However, most of the DP interception devices currently on the market only provide low-level message interception and communication fault voltage value measurement, and provide the interception and measurement results to communication development engineers and operation and maintenance personnel. Carry out professional analysis and monitoring of DP network so that it can carry out communication failure analysis and communication system maintenance.

To sum up, the existing PROFIBUS-DP network diagnosis method cannot obtain effective fault diagnosis information and corresponding solutions, and requires high professional knowledge of maintenance personnel who implement diagnosis, and the diagnosis is not accurate enough.

Utility model content

Aiming at the above problems, the utility model proposes a diagnostic device for PROFIBUS-DP communication network.

The diagnostic equipment of the PROFIBUS-DP communication network of the utility model comprises: a detector, a main station analyzer electrically connected with the detector, and a storage unit electrically connected with the main station analyzer. The detector is connected to the PROFIBUS-DP communication network, and is used for detecting messages and fault voltage values in the PROFIBUS-DP communication network. The storage unit is used to store fault diagnosis experience information. The master station analyzer is used to receive the message and the fault voltage value, and determine the fault information and/or fault handling information of the PROFIBUS-DP communication network according to the fault diagnosis experience information in the storage unit.

Preferably, the diagnostic equipment of the PROFIBUS-DP communication network of the present invention further includes a DP connector, and the detector is connected to the station of the PROFIBUS-DP communication network under test through the DP connector.

Preferably, the detector includes a differential bus transceiver and an analog-to-digital converter, and the differential bus transceiver and the analog-to-digital converter are respectively electrically connected to the main station analyzer. And, the differential bus transceiver and the analog-to-digital converter are respectively connected to the DP connector. The differential bus transceiver is used to receive and forward messages, and the analog-to-digital converter is used to measure the analog voltage and convert it into a fault voltage value.

Preferably, the main station analyzer includes a first processor and a second processor, and the second processor is connected to the first processor through a serial bus. Wherein, the first processor is electrically connected with the differential bus transceiver and the analog-to-digital converter, and is used to determine the communication group status of the communication network and/or the physical error of the slave station based on the analysis result of the message and the fault voltage value. The second processor is configured to determine diagnostic information of the communication network based on the analysis result, compare the diagnostic information with fault diagnosis experience information, and determine corresponding fault information and fault handling information.

Preferably, the second processor is a central processing unit CPU, a microcontroller MCU or a field programmable gate array FPGA.

Preferably, the main station analyzer further includes peripheral auxiliary circuits, which are respectively electrically connected to the first processor and the second processor for filtering and/or storage.

Preferably, the diagnostic device further includes a communication interface, and the storage unit is connected to the host computer through the communication interface. The upper computer performs remote monitoring and diagnosis on the equipment, and/or updates the fault diagnosis experience information in the storage unit.

Preferably, the diagnostic device of the PROFIBUS-DP communication network of the present invention further includes a display device, which is electrically connected to the main station analyzer, and is used for displaying fault information and fault processing information.

Preferably, the diagnostic equipment of the PROFIBUS-DP communication network of the present invention also includes a built-in memory, which is electrically connected with the detector, and is used for storing information detected by the detector. The built-in memory is specifically a nonvolatile memory.

Preferably, the diagnostic device of the PROFIBUS-DP communication network of the present invention further includes an external storage interface, the external storage interface is electrically connected to the detector, and the storage interface is connected to the external memory.

The beneficial effects obtained by applying the embodiment of the utility model are:

1. Since the diagnostic equipment in this embodiment is equipped with an application experience database, the application experience database pre-stores data such as the analysis results of various messages or fault voltage values, the correspondence between fault information and fault processing information, so that The diagnostic equipment in this embodiment analyzes the detected messages and fault voltage values, and then compares them with the data in the application experience database to quickly obtain corresponding fault information and provide corresponding troubleshooting methods and solutions. On-site inspection and maintenance personnel can quickly obtain fault information and solutions, make DP network communication clueless inspections more targeted and can quickly locate bus faults, greatly reducing troubleshooting and resolution time.

2. In the prior art, each maintenance personnel judges the fault based on their own professional knowledge and experience, and selects troubleshooting methods and solutions. Since the professional knowledge and experience of each maintenance personnel are uneven, it is easy to make judgment errors or choose Improper, resulting in easy to determine inaccurate fault information, or choose inappropriate troubleshooting methods and solutions; in contrast, this embodiment can provide more accurate fault information based on the application experience database, and can provide more For proper troubleshooting and resolution.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above-mentioned and/or additional aspects and advantages of the utility model will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the frame schematic diagram of the structure of the diagnostic equipment of the utility model embodiment;

Fig. 2 is a schematic diagram of the connection between the diagnostic equipment and the network to be detected according to the embodiment of the utility model.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present utility model refers to the presence of the stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features , integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The expression "and/or" used herein includes all or any elements and all combinations of one or more associated listed items.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with their meaning in the context of the prior art, and unless specifically defined as herein, are not intended to be idealized or overly Formal meaning to explain.

The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the embodiment of the utility model provides a diagnostic device for a PROFIBUS-DP communication network, including: a detector, a master station analyzer electrically connected to the detector, and a storage device electrically connected to the master station analyzer unit.

The detector is connected to the PROFIBUS-DP communication network, and is used for detecting messages and fault voltage values in the PROFIBUS-DP communication network.

The storage unit is used to store fault storage diagnosis experience information.

The master station analyzer receives the message and the fault voltage value, and determines the fault information and/or fault handling information of the PROFIBUS-DP communication network according to the fault diagnosis experience information in the storage unit.

Specifically, the master station analyzer is used to analyze the message and the fault voltage value, and compare the analysis result with the fault diagnosis experience information in the storage unit to determine the fault information and/or fault handling of the PROFIBUS-DP communication network information.

Since the diagnostic equipment in this embodiment is provided with a storage unit, the storage unit is pre-stored with an application experience database, which contains data such as analysis results of various messages or fault voltage values, correspondence between fault information and fault processing information, etc. , so that the diagnostic equipment in this embodiment analyzes the detected message and the fault voltage value, and then compares it with the data in the application experience database, so as to quickly obtain the corresponding fault information and provide corresponding troubleshooting solutions and solutions. On-site inspection and maintenance personnel can quickly obtain fault information and solutions, make DP network communication clueless inspections more targeted and can quickly locate bus faults, greatly reducing troubleshooting and resolution time.

Moreover, since the diagnostic equipment in this embodiment can obtain fault information and corresponding solutions at the troubleshooting site, maintenance personnel do not need to use the existing DP bus listening equipment that can provide professional message monitoring and communication differential voltage measurement , which reduces the maintenance personnel's requirements for the professional knowledge and skills of the DP underlying communication protocol.

Further, in the prior art, each maintenance personnel judges the fault according to their own professional knowledge and experience, and selects troubleshooting methods and solutions. Since the professional knowledge and experience of each maintenance personnel are uneven, it is easy to make judgment errors or choose Improper, resulting in easy to determine inaccurate fault information, or choose inappropriate troubleshooting methods and solutions; in contrast, this embodiment can provide more accurate fault information based on the application experience database, and can provide more For proper troubleshooting and resolution.

In a preferred embodiment, as shown in FIG. 2 , the diagnostic equipment of the PROFIBUS-DP communication network of the present invention also includes a DP connector, and the detector is connected to the station of the PROFIBUS-DP communication network under test through the DP connector. Wherein, the station under test may be a master station or a slave station.

Specifically, Fig. 1 shows a schematic diagram of the internal structure of the diagnostic equipment in this embodiment, wherein the detector includes a differential bus transceiver and an analog-to-digital converter, and the differential bus transceiver and the analog-to-digital converter are respectively connected to the main station analyzer electrical connection.

In addition, a differential bus transceiver and an analog-to-digital converter are respectively connected to the DP connector.

The differential bus transceiver is used to receive and forward messages, and the analog-to-digital converter is used to measure the analog voltage and convert it into a fault voltage value. In the message, data such as the address of the master station of the DP network, the address of the slave station and the verification code are stored.

Further, in this embodiment, the main station analyzer includes a first processor and a second processor. The second processor is connected to the first processor through a serial bus.

Wherein, the first processor is electrically connected with the differential bus transceiver and the analog-to-digital converter, and is used to determine the communication group status of the communication network and/or the physical error of the slave station based on the analysis result of the message and the fault voltage value.

The second processor is electrically connected to the first processor, and is used to determine the diagnostic information of the communication network based on the analysis result, compare the diagnostic information with the fault diagnosis experience information, and determine corresponding fault information and fault handling information.

The operation process of the diagnostic equipment of this embodiment is described in detail below:

After the diagnostic equipment in this embodiment is connected to the communication network to be tested, the diagnostic equipment sends test signals to the master station or the slave station in the network to be tested from time to time, if problems such as impedance changes occur in the network to be tested, wherein Part of the energy will be reflected, forming a reflected wave; while the rest of the energy will continue to transmit. The reflected wave is carried in the analog voltage.

The differential bus transceiver in the detector receives and forwards the messages in the communication network, and the analog-to-digital converter measures the analog voltage in real time and converts it into a fault voltage value. The differential bus transceiver sends the collected message to the first processor, and the analog-to-digital converter sends the converted fault voltage value to the first processor, for example, all of them are sent to the data buffer area in the first processor.

Next, the first processor parses the received message and the fault voltage value. Based on the above principle, the first processor performs high-speed conversion on the received fault voltage value, and analyzes the reflected wave generated due to problems such as impedance changes in the DP communication network from the received fault voltage value. Judging whether the communication group status of the communication network is correct and/or the physical error of the slave station according to the following message and the fault voltage value.

The first processor then sends the analyzed message and the fault voltage value to the second processor, and the second processor draws a topology diagram of the communication network according to the analyzed fault voltage value, and according to the topology diagram and the analysis The final message determines the diagnostic information of the communication network. The second processor compares the diagnostic information with the information stored in the application storage unit therein, and then determines the fault information corresponding to the diagnostic information and the corresponding fault handling measures, and uses the determined fault information and/or corresponding The fault handling measures are displayed to provide reference for on-site inspection and maintenance personnel. On-site repair and maintenance personnel can more easily carry out targeted repair and maintenance on site through the above fault information and fault handling measures, which greatly reduces the time for troubleshooting and resolution.

More preferably, the second processor is connected with the first processor through a serial bus; the second processor is specifically a CPU (Central Processing Unit, central processing unit), MCU (Micro Controller Unit, microcontroller) or FPGA ( Field-Programmable Gate Array, Field Programmable Gate Array).

Preferably, peripheral auxiliary circuits may also be included in the main station analyzer. The peripheral auxiliary circuits are respectively electrically connected to the first processor and the second processor for filtering and/or storage. Wherein, the peripheral auxiliary circuit includes multiple auxiliary functions such as filtering and storage.

In a preferred embodiment, the storage unit is also connected to the communication interface, and the storage unit is connected to the host computer through the communication interface; the host computer performs remote monitoring and diagnosis on the diagnostic equipment of the PROFIBUS-DP communication network of this embodiment, and/or updates the storage unit. fault diagnosis experience information. The communication interface may include, for example, a wireless network module interface and an RJ45 network interface for connecting to an external network or a host computer. Through the wireless network module and the RJ45 network interface, the diagnostic device in this embodiment can realize remote monitoring and diagnosis of the device and/or update the fault diagnosis experience information in the storage unit module, and realize the self-learning of the diagnostic device in this embodiment .

Preferably, the diagnostic device in this embodiment may further include a display device, which is electrically connected to the main station analyzer, and is used to display fault information and fault handling information to inspectors.

Preferably, the diagnostic device in this embodiment further includes a built-in memory electrically connected to the detector for storing information detected by the detector; further, the built-in memory is specifically a non-volatile memory.

Preferably, the diagnostic device in this embodiment further includes an external storage interface, which is electrically connected to the detector, and is used to store the information detected by the detector in this embodiment after being connected to an external memory.

Preferably, the status diagnosis device in this embodiment may further include a battery for providing power to other devices in the device, so that the status diagnosis in this embodiment can run without an external power supply.

The beneficial effects obtained by applying the embodiment of the utility model are:

1. Since the diagnostic equipment in this embodiment is provided with an application storage unit, the application storage unit pre-stores data such as the analysis results of various messages or fault voltage values, the correspondence between fault information and fault processing information, so that The diagnostic equipment in this embodiment analyzes the detected message and the fault voltage value, and compares it with the data in the application storage unit, so as to quickly obtain the corresponding fault information and provide corresponding troubleshooting methods and solutions. On-site inspection and maintenance personnel can quickly obtain fault information and solutions, make DP network communication clueless inspections more targeted and can quickly locate bus faults, greatly reducing troubleshooting and resolution time.

2. In the prior art, each maintenance personnel judges the fault based on their own professional knowledge and experience, and selects troubleshooting methods and solutions. Since the professional knowledge and experience of each maintenance personnel are uneven, it is easy to make judgment errors or choose Improper, resulting in easy determination of inaccurate fault information, or selection of inappropriate troubleshooting methods and solutions; in contrast, this embodiment can provide more accurate fault information based on the application storage unit, and can provide more For proper troubleshooting and resolution.

The foregoing is only a partial implementation of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the utility model. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (10)

1. a kind of diagnostic equipment of PROFIBUS-DP communication network, it is characterized in that, comprise: detector, the main station analyzer that is electrically connected with described detector and the storage unit that is electrically connected with described master station analyzer; The detector is connected to the PROFIBUS-DP communication network for detecting messages and fault voltage values in the PROFIBUS-DP communication network; The storage unit is used to store fault diagnosis experience information; The master station analyzer receives the message and the fault voltage value, and determines the fault information and/or fault handling information of the PROFIBUS-DP communication network according to the fault diagnosis experience information in the storage unit. 2. The diagnostic device according to claim 1, characterized in that, the diagnostic device further comprises a DP connector, and the detector is connected to a station of the PROFIBUS-DP communication network under test through the DP connector. 3. The diagnostic device of claim 2, wherein The detector includes a differential bus transceiver and an analog-to-digital converter, the differential bus transceiver and the analog-to-digital converter are respectively electrically connected to the main station analyzer, and the differential bus transceiver and the Analog-to-digital converters are respectively connected to the DP connectors; The differential bus transceiver is used to receive and forward the message, and the analog-to-digital converter is used to measure an analog voltage and convert it into the fault voltage value. 4. The diagnostic device according to claim 3, wherein the master station analyzer comprises a first processor and a second processor, and the second processor communicates with the first processor through a serial bus connected; among them, A first processor, electrically connected to the differential bus transceiver and the analog-to-digital converter, configured to determine the communication configuration and/or the communication network of the communication network based on the analysis result of the message and the fault voltage value Physical error of the slave; The second processor is configured to determine diagnostic information of the communication network based on the analysis result, compare the diagnostic information with the fault diagnosis experience information, and determine corresponding fault information and fault handling information. 5. The diagnostic device according to claim 4, wherein the second processor is a central processing unit (CPU), a microcontroller (MCU) or a field programmable gate array (FPGA). 6. The diagnostic device according to claim 4, characterized in that, the master station analyzer also includes a peripheral auxiliary circuit, The peripheral auxiliary circuits are respectively electrically connected to the first processor and the second processor for filtering and/or storage. 7. The diagnostic device according to claim 1, further comprising a communication interface, the storage unit is connected to the host computer through the communication interface; The upper computer performs remote monitoring and diagnosis on the equipment, and/or updates the fault diagnosis experience information in the storage unit. 8. The diagnostic device of claim 1, further comprising: A display device, electrically connected to the main station analyzer, is used to display the fault information and fault handling information. 9. The diagnostic device according to claim 1, further comprising a built-in memory electrically connected to the detector for storing information detected by the detector; the built-in memory is specifically a non-volatile sexual memory. 10 . The diagnostic device according to claim 1 , further comprising an external storage interface, the external storage interface is electrically connected to the detector, and the storage interface is connected to an external memory. 11 .