CN201805556U - Information inquiry device, wireless transmission apparatus and MODBUS slave station - Google Patents
Information inquiry device, wireless transmission apparatus and MODBUS slave station Download PDFInfo
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- CN201805556U CN201805556U CN2010205101148U CN201020510114U CN201805556U CN 201805556 U CN201805556 U CN 201805556U CN 2010205101148 U CN2010205101148 U CN 2010205101148U CN 201020510114 U CN201020510114 U CN 201020510114U CN 201805556 U CN201805556 U CN 201805556U
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Abstract
The utility model is adapted for the field of communications, and provides an information inquiry device, a wireless transmission apparatus and a MODBUS slave station, the device comprises a configuration unit for storing timed inquiry information, a timed inquiry unit connected with the configuration unit and the MODBUS slave station and used for regularly transmitting inquiry instructions to a corresponding MODBUS slave station according to the timed inquiry information stored in the configuration unit, and an inquiry feedback unit respectively connected with the MODBUS slave station and a MODBUS master station and used for receiving response signals from the MODBUS slave station and forwarding the received response signals to the MODBUS master station. In embodiments of the utility model, the timed inquiry unit regularly transmits the inquiry instructions to corresponding MODBUS slave station according to the timed inquiry information stored in the configuration unit, and the inquiry feedback unit receives the response signals from the MODBUS slave station and forwards the response signals to the MODBUS master station, so that data real-time property of an MODBUS protocol based wireless application system can be improved, traffic is reduced, and communication cost is also reduced.
Description
Technical field
The utility model belongs to the communications field, relates in particular to a kind of information query device, radio transmission apparatus, MODBUS slave station and MODBUS main website.
Background technology
Modbus is the application layer Message Protocol on the 7th layer of the osi model, and it provides client/server communication between the equipment that is connected to dissimilar buses or network.At present, can realize Modbus communication by following three kinds of modes: the TCP/IP on the Ethernet, various medium (comprise wire mediums such as EIA/TIA-232-F, EIA-422, EIA/TIA-485-A, optical fiber, wireless medium etc.) on asynchronous serial transmission, and high speed token passing network Modbus PLUS.MODBUS is a kind of industrial communication and dcs agreement, by famous not Dicon AS (MODICON INC) proposition of Programmable Logic Controller manufacturing company of the U.S., is widely used in the Industry Control.MODBUS is a kind of principal and subordinate's agreement, allows a main frame to communicate by letter with many slaves, and by this agreement, controller each other, controller is via communicating by letter between network (for example Ethernet) and the miscellaneous equipment.It has become a universal industrial standard.It has been arranged, and the control appliance that different vendor produces can be linked to be industrial network, carries out centralized monitor.The general modfel of using MODBUS in wireless domain such as the remote collection of a dispersion, monitoring as shown in Figure 1, MODBUS main website 101 and radio transmission apparatus 103 are communicated by letter by wireless data transmission networks such as GPRS/CDMA 102, radio transmission apparatus 103 adopts serial communication with MODBUS slave station 104, adopts MODBUS main website 101 to send instruction and asks the mode of operation that MODBUS slave station 104 is wanted field data.MODBUS main website 101 can also (Personal Computer, PC) 105 connect with PC.
Existing wireless application system based on the MODBUS agreement, the MODBUS main website asks MODBUS that slave station is replied, the radio transmission apparatus transparent transmission is connected MODBUS main website and MODBUS slave station, and some application that real-time property is had a requirement often MODBUS main website will often ask MODBUS that slave station is wanted data by radio transmission apparatus.Like this,, add the unsteadiness of wireless network, can produce more flow, bring higher communication cost by the exchanges data that wireless network one is had a try.
In sum, the real-time property of existing wireless application system based on the MODBUS agreement reduces, flow is big, radio communication cost height.
The utility model content
The purpose of this utility model is intended to solve the problem that prior art exists, and a kind of information query device is provided, and can improve real-time property, minimizing flow, reduction communications cost based on the wireless application system of MODBUS agreement.
The utility model is achieved in that a kind of information query device, comprising:
Be used to store the regularly dispensing unit of Query Information;
Be connected with the MODBUS slave station with described dispensing unit, be used for the timing Query Information stored according to described dispensing unit, regularly send the timing query unit of query statement to corresponding MODBUS slave station; And
Be connected with the MODBUS main website with the MODBUS slave station respectively, be used to receive the answer signal that the MODBUS slave station returns, and the answer signal that receives be transmitted to the inquiry feedback unit of MODBUS main website.
Another purpose of the present utility model is to provide a kind of radio transmission apparatus, and described equipment comprises above-mentioned information query device.
Another purpose of the present utility model is to provide a kind of radio transmission apparatus, and described equipment comprises above-mentioned MODBUS slave station.
Another purpose of the present utility model is to provide a kind of MODBUS main website, comprising:
Be used for according to the communication protocol information that sets in advance, the trigger message that receives be converted to the real-time query unit that sends to information query device behind the real-time Query Information; And
Be connected with described real-time query unit, be used to receive the information query device feedback answer signal reply receiving element.
In the utility model, by the timing query unit according to the timing Query Information of storing in the dispensing unit, regularly send query statement to corresponding MODBUS slave station, the inquiry feedback unit receives the answer signal that the MODBUS slave station returns, and the answer signal that receives is transmitted to the MODBUS main website, realized a kind of information query device, can improve real-time property, minimizing flow, reduction communications cost based on the wireless application system of MODBUS agreement.
Description of drawings
Fig. 1 is the structural representation based on the wireless application system of MODBUS agreement that prior art provides;
Fig. 2 is the structural representation of the information query device that provides of the utility model embodiment;
Fig. 3 is the operational flow diagram that information query device that the utility model embodiment provides is initiatively inquired about;
Fig. 4 is the passive operational flow diagram of inquiring about of information query device that the utility model embodiment provides;
Fig. 5 is the structural representation of the wireless application system that comprises information query device that provides of the utility model embodiment;
Fig. 6 is the structural representation of the MODBUS main website that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Among the utility model embodiment, by the timing query unit according to the timing Query Information of storing in the dispensing unit, regularly send query statement to corresponding MODBUS slave station, the inquiry feedback unit receives the answer signal that the MODBUS slave station returns, and the answer signal that receives is transmitted to the MODBUS main website, realized a kind of information query device.
Fig. 2 shows the structure of the information query device that the utility model embodiment provides, and for convenience of description, only shows the part relevant with the utility model.
Dispensing unit 201, storage is Query Information regularly, and this timing Query Information comprises at least one query statement of polling interval, polling interval correspondence, and at least one MODBUS tributary address of each query statement correspondence; Article one, query statement is used to inquire about a kind of data or incident, and promptly polling interval can corresponding one or more query statement, and query statement again can corresponding one or more MODBUS tributary address;
Regularly query unit 202 according to the timing Query Information of storage in the dispensing unit 201, regularly sends query statement to corresponding MODBUS slave station;
Inquiry feedback unit 203 receives the answer signal that the MODBUS slave station returns, and the answer signal that receives is transmitted to the MODBUS main website.
In the utility model embodiment, the Query Information of storage timing in advance in the dispensing unit 201; Regularly query unit 202 is according to the timing Query Information of storage in the dispensing unit 201, at the timing of correspondence then, sends one or more corresponding query statement to corresponding MODBUS slave station; Then, receive the answer signal that the MODBUS slave station returns by inquiry feedback unit 203, again according to this information query device that sets in advance and the communication protocol between the MODBUS main website, be transmitted to the MODBUS main website after the answer signal that receives is converted to the corresponding communication agreement.
Certainly, MODBUS main website address, communication protocol information etc. also can set in advance and be stored in the dispensing unit 201, and inquiry feedback unit 203 obtains MODBUS main website address, communication protocol etc. from dispensing unit 201.Like this, after feedback unit receives the answer signal that the MODBUS slave station returns,, be transmitted to the MODBUS main website after this answer signal is converted to the corresponding communication agreement according to the communication protocol of storage in the dispensing unit 201.
Wherein, communication protocol between MODBUS main website and the information query device can be according to settings such as affiliated network, concrete needs, for communication, the MODBUS main website can be MODBUS transmission control protocol (Transmission Control Protocol, TCP) MODBUS main website, corresponding host-host protocol then is the MODBUS Transmission Control Protocol; The MODBUS main website also can (corresponding communication protocol then be the DDP agreement for Datagram Delivery Protocol, DDP) data center for the datagram transportation protocol.Like this, be the situation of MODBUS Transmission Control Protocol for host-host protocol, after being converted to the MODBUS Transmission Control Protocol with the answer signal that receives, inquiry feedback unit 203 is transmitted to the MODBUS main website; For host-host protocol is the situation of DDP protocol, inquiry feedback unit 203 is converted to the MODBUS Transmission Control Protocol with the answer signal that receives, and is transmitted to the MODBUS main website after the answer signal that will be converted into the MODBUS Transmission Control Protocol again is encapsulated into DDP application data transmission package as data content.Certainly, the communication protocol between transmission MODBUS main website and the information query device can also be given unnecessary details here no longer one by one for other agreements.
The operational process that information query device is initiatively inquired about as shown in Figure 3, in step S301, information query device powers on; In step S302, land the MODBUS main website; If land success, then enter step S303, set up maintenance link, maintenance links with the MODBUS main website; Otherwise, enter step S304, carry out the failure handling process; In step S305, regularly query unit 202 judges whether timing according to the timing Query Information of storage in the dispensing unit 201; If then enter step S306, send query statement to corresponding MODBUS slave station; Otherwise, enter step S307, wait for that timing arrives; In step S308, inquiry feedback unit 203 receives the answer signal that the MODBUS slave station returns; In step S309, judge communication protocol for whether the MODBUS Transmission Control Protocol; If then enter step S310, be transmitted to the MODBUS main website after the answer signal that receives is converted to the MODBUS Transmission Control Protocol; Otherwise, enter step S311, the answer signal that receives is converted to be encapsulated into behind the MODBUS Transmission Control Protocol again is transmitted to the MODBUS main website in the DDP agreement.
Further, can obtain MODBUS slave station relevant information as required in real time in order to make the MODBUS main website, as a preferred embodiment of the present utility model, information query device also comprises:
Real-time query unit 204, receive the real-time Query Information that the MODBUS main website sends, communication protocol information according to storage in the dispensing unit 201 is resolved the real-time Query Information that receives, send the query statement that is converted to corresponding MODBUS slave station, comprise at least one query statement in this real-time Query Information, and at least one MODBUS tributary address of each query statement correspondence.The same, a query statement can corresponding one or more MODBUS tributary address.
Particularly, for host-host protocol is the situation of MODBUS Transmission Control Protocol, and the MODBUS RTU or the MODBUS ASCII protocol that are converted into the support of MODBUS slave station in real time after the real-time Query Information employing MODBUS Transmission Control Protocol parsing that query unit 204 will receive send to the MODBUS slave station; For being the situation of DDP protocol for host-host protocol, obtain its data content behind the real-time Query Information employing DDP protocol analysis that query unit 204 will receive in real time, further adopt the MODBUS Transmission Control Protocol to resolve data content that obtains and the MODBUS RTU that is converted into the support of MODBUS slave station or MODBUS ASCII protocol again and send to the MODBUS slave station.
Equally, inquiry feedback unit 203 receives the answer signal that the MODBUS slave station returns, and according to the communication protocol of storing in the dispensing unit 201, be transmitted to the MODBUS main website after the answer signal that receives is converted to the MODBUS Transmission Control Protocol, maybe the answer signal that receives be converted to be encapsulated into again behind the MODBUS Transmission Control Protocol and be transmitted to the MODBUS main website in the DDP agreement.
Information query device according to the passive operational process of inquiring about of the real-time Query Information of MODBUS main website as shown in Figure 4, in step S401, in real time query unit 204 receives the real-time Query Information that the MODBUS main websites send; In step S402, in real time query unit 204 judge communication protocol for whether the MODBUS Transmission Control Protocol; If then enter step S403, resolve the timing Query Information that receives according to the MODBUS Transmission Control Protocol, send the query statement that is converted to corresponding MODBUS slave station; Otherwise, entering step S404, the timing Query Information that receives according to the DDP protocol analysis obtains resolving the data content that obtains according to the MODBUS Transmission Control Protocol again behind its data content, obtains querying command, sends the query statement that obtains to corresponding MODBUS slave station; In step S405, inquiry feedback unit 203 receives the answer signal that the MODBUS slave station returns; In step S406, judge communication protocol for whether the MODBUS Transmission Control Protocol; If then enter step S407, be transmitted to the MODBUS main website after the answer signal that receives is converted to the MODBUS Transmission Control Protocol; Otherwise, enter step S408, the answer signal that receives is converted to be encapsulated into behind the MODBUS Transmission Control Protocol again is transmitted to the MODBUS main website in the DDP agreement.
Certainly, reduce not no timing inquiry in order to inquire about in real time in the MODBUS main website, to reduce flow, to reduce communications cost, as a preferential embodiment of the present utility model, information query device also comprises:
Suspend unit 205, when real-time query unit 204 receives the real-time Query Information of MODBUS main website transmission, control regularly query unit 202 suspends to corresponding MODBUS slave station transmission query statement, and inquiring about feedback unit 203 when the MODBUS main website transmits the answer signal of this real-time Query Information correspondence, control regularly query unit 202 continues to send query statement to corresponding MODBUS slave station.
Like this, can be so that inquire about in real time for receive the real-time Query Information that the MODBUS main website sends in real-time query unit 204, to inquiring about feedback unit 203 in this process of the result of MODBUS main website feedback active inquiry, regularly query unit 202 is suspended regularly inquiry, after real-time inquiry is finished, just continue regularly inquiry again.
For the situation that adopts the DDP agreement to communicate between information query device and MODBUS main website, except real-time Query Information, the MODBUS main website can also send control informations such as parameter query disposes, restarts, registration reply by the DDP agreement to information query device, at this moment, after information query device is resolved according to DDP, DDP bag is handled, comprised that parameter query disposes, restarts, registration reply etc.
For better control flow with guarantee real-time, at the timing polling interval of the configuration different time sections such as actual conditions of MODBUS slave station data, as another preferred embodiment of the present utility model,
The timing Query Information of storage also comprises the time period in the dispensing unit 201, and the different time periods can corresponding different polling intervals.
Like this, regularly query unit 202 can adopt different polling intervals regularly to send query statement to corresponding MODBUS slave station in different time sections according to the timing Query Information of dispensing unit 201 storages.
For the ease of the relevant configuration information of the storage in the user's modification dispensing unit 201, as another preferred embodiment of the present utility model, this information query device also comprises:
Parameter modifying unit 206 receives the parameter modification information of user's input, revises one or more in the timing Query Information, MODBUS main website address, communication protocol information of storage in the dispensing unit 201 according to the parameter modification information that receives.
The information query device that the utility model provides can be separate equipment, also can be integrated in radio transmission apparatus or the MODBUS slave station.
When this information query device is integrated in the radio transmission apparatus 501, comprise MODBUS main website 502, radio transmission apparatus 501, MODBUS slave station application system block diagram as shown in Figure 5.MODBUS main website 502 can communicate by letter by wireless data transmission networks such as GPRS/CDMA 503 with radio transmission apparatus 501, MODBUS main website 502 can also link the network terminal by the Internet 504, be connected to radio transmission apparatus 501 by the network terminal by wireless data transmission networks such as GPRS/CDMA 503 again, radio transmission apparatus 501 can adopt serial communication with MODBUS slave station 505.Certainly, the quantity of MODBUS slave station 505 is not limit, and has only provided the situation that two MODBUS slave stations 505 are arranged here.
Corresponding above-mentioned information query device, the utility model embodiment also provide a kind of MODBUS main website, as shown in Figure 6, for convenience of description, only show the part relevant with the utility model.
Real-time query unit 601 according to the communication protocol information that sets in advance, sends to information query device after the trigger message that receives is converted to real-time Query Information.This trigger message can be that the user imports, and also can get access to from other applying units; Address, at least one query statement that can comprise information query device in this trigger message, and at least one MODBUS tributary address of each query statement correspondence; Wherein, a query statement can corresponding one or more MODBUS tributary address.Certainly, the address of information query device also can set in advance in real-time query unit 601 or other memory cell.Equally, communication protocol information also can set in advance in real-time query unit 601 or other memory cell.
Reply receiving element 602, receive the answer signal of information query device feedback.
Like this, the MODBUS main website only just sends real-time Query Information to information query device when needs are inquired about in real time to the MODBUS slave station.Communication protocol between MODBUS main website and the information query device is MODBUS TCP or DDP agreement.
For host-host protocol is the situation of MODBUS Transmission Control Protocol, sends to information query device after query unit 601 is converted to real-time Query Information according to the MODBUS Transmission Control Protocol with the trigger message that receives in real time; For host-host protocol is the situation of DDP protocol, in real time query unit 601 is converted to instruction according to the MODBUS Transmission Control Protocol with the trigger message that receives earlier, and the instruction that will obtain according to the DDP agreement is encapsulated into as data content after the application data transmission package of DDP as Query Information in real time and sends to the information inquiry module again.
Accordingly, be the situation of MODBUS Transmission Control Protocol for host-host protocol, reply receiving element 602 and resolve the answer signal that receives according to the MODBUS Transmission Control Protocol; For host-host protocol is the situation of DDP protocol, replys 602 elder generations of receiving element and according to the DDP agreement answer signal that receives is unpacked and obtain its data content, is resolving the data content that obtains according to the MODBUS Transmission Control Protocol.
For the ease of the relevant configuration information of user's modification MODBUS main website, as a preferred embodiment of the present utility model, the MODBUS main website also comprises:
Among the utility model embodiment, by the timing query unit according to the timing Query Information of storing in the dispensing unit, regularly send query statement to corresponding MODBUS slave station, the inquiry feedback unit receives the answer signal that the MODBUS slave station returns, and the answer signal that receives is transmitted to the MODBUS main website, realized a kind of information query device, can improve real-time property, minimizing flow, reduction communications cost based on the wireless application system of MODBUS agreement.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. an information query device is characterized in that, described device comprises:
Be used to store the regularly dispensing unit of Query Information;
Be connected with the MODBUS slave station with described dispensing unit, be used for the timing Query Information stored according to described dispensing unit, regularly send the timing query unit of query statement to corresponding MODBUS slave station; And
Be connected with the MODBUS main website with the MODBUS slave station respectively, be used to receive the answer signal that the MODBUS slave station returns, and the answer signal that receives be transmitted to the inquiry feedback unit of MODBUS main website.
2. device as claimed in claim 1 is characterized in that, described device also comprises:
Be connected with the MODBUS main website with the MODBUS slave station respectively, be used to receive the real-time Query Information that described MODBUS main website sends, resolve the real-time Query Information that receives according to the communication protocol information of storing in the described dispensing unit, send the real-time query unit of the query statement that is converted to corresponding MODBUS slave station.
3. device as claimed in claim 2 is characterized in that, described device also comprises:
Be connected with described real-time query unit, timing query unit and inquiry feedback unit respectively, be used for when described real-time query unit receives the real-time Query Information of MODBUS main website transmission, controlling described timing query unit suspends to corresponding MODBUS slave station transmission query statement, and at described inquiry feedback unit when the MODBUS main website transmits the answer signal of this real-time Query Information correspondence, control the time-out unit that described timing query unit continues to send to corresponding MODBUS slave station query statement.
4. device as claimed in claim 1 is characterized in that, described device also comprises:
Be connected with described dispensing unit, be used to receive the parameter modification information of user's input, revise one or more parameter modifying unit in the timing Query Information stored in the described dispensing unit, MODBUS main website address, the communication protocol information according to the parameter modification information that receives.
5. a radio transmission apparatus is characterized in that, described equipment comprises each described information query device of claim 1 to 4.
6. a MODBUS slave station is characterized in that, described slave station comprises each described information query device of claim 1 to 4.
7. a MODBUS main website is characterized in that, described main website comprises:
Be used for according to the communication protocol information that sets in advance, the trigger message that receives be converted to the real-time query unit that sends to information query device behind the real-time Query Information; And
Be connected with described real-time query unit, be used to receive the information query device feedback answer signal reply receiving element.
8. main website as claimed in claim 7 is characterized in that, described main website also comprises:
Be connected with described real-time query unit, be used to receive the parameter modification information of user's input, revise the communication protocol information that sets in advance or the parameter modifying unit of information query device address according to the parameter modification information that receives.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205101148U CN201805556U (en) | 2010-08-30 | 2010-08-30 | Information inquiry device, wireless transmission apparatus and MODBUS slave station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205101148U CN201805556U (en) | 2010-08-30 | 2010-08-30 | Information inquiry device, wireless transmission apparatus and MODBUS slave station |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281987A (en) * | 2013-07-03 | 2015-01-14 | 厦门市博维科技有限公司 | Auto-answer system for providing dinning and entertainment information |
| CN104599481A (en) * | 2014-12-10 | 2015-05-06 | 南昌市科陆智能电网科技有限公司 | Optical fiber network based high speed meter reading system and method |
| CN105025056A (en) * | 2014-04-25 | 2015-11-04 | 上海迪爱斯通信设备有限公司 | Internet of Things information collection and monitoring system design method |
| CN111124986A (en) * | 2019-12-30 | 2020-05-08 | 贵州兔淘智能科技有限公司 | Asynchronous serial port communication protocol compatible with Modbus and high in efficiency |
| CN112698973A (en) * | 2021-01-04 | 2021-04-23 | 烽火通信科技股份有限公司 | System, method and device for automatic registration and management of modbus equipment |
| CN113039546A (en) * | 2019-02-26 | 2021-06-25 | 深圳配天智能技术研究院有限公司 | Master-slave equipment communication system and method |
| CN113055755A (en) * | 2021-04-01 | 2021-06-29 | 上海舜华新能源***有限公司 | Modbus mode conversion device |
| CN114513386A (en) * | 2022-04-19 | 2022-05-17 | 卓望数码技术（深圳）有限公司 | MODBUS equipment networking method and device, computer equipment and medium |
-
2010
- 2010-08-30 CN CN2010205101148U patent/CN201805556U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281987A (en) * | 2013-07-03 | 2015-01-14 | 厦门市博维科技有限公司 | Auto-answer system for providing dinning and entertainment information |
| CN105025056A (en) * | 2014-04-25 | 2015-11-04 | 上海迪爱斯通信设备有限公司 | Internet of Things information collection and monitoring system design method |
| CN104599481A (en) * | 2014-12-10 | 2015-05-06 | 南昌市科陆智能电网科技有限公司 | Optical fiber network based high speed meter reading system and method |
| CN113039546A (en) * | 2019-02-26 | 2021-06-25 | 深圳配天智能技术研究院有限公司 | Master-slave equipment communication system and method |
| CN111124986A (en) * | 2019-12-30 | 2020-05-08 | 贵州兔淘智能科技有限公司 | Asynchronous serial port communication protocol compatible with Modbus and high in efficiency |
| CN112698973A (en) * | 2021-01-04 | 2021-04-23 | 烽火通信科技股份有限公司 | System, method and device for automatic registration and management of modbus equipment |
| CN113055755A (en) * | 2021-04-01 | 2021-06-29 | 上海舜华新能源***有限公司 | Modbus mode conversion device |
| CN114513386A (en) * | 2022-04-19 | 2022-05-17 | 卓望数码技术（深圳）有限公司 | MODBUS equipment networking method and device, computer equipment and medium |
| CN114513386B (en) * | 2022-04-19 | 2022-07-26 | 卓望数码技术（深圳）有限公司 | MODBUS equipment networking method and device, computer equipment and medium |
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