CN102932222A - Communication converter supporting recommended standard (RS) 485 and Modbus multi-master station data acquisition - Google Patents
Communication converter supporting recommended standard (RS) 485 and Modbus multi-master station data acquisition Download PDFInfo
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Abstract
The invention discloses a communication converter supporting recommended standard (RS) 485 and Modbus multi-master station data acquisition. The communication converter comprises an advanced reduced instruction set computer (RISC) machine (ARM) microprocessor, a power/reset circuit, a standby link, a user interface (UI) circuit, a synchronous dynamic random access memory (SDRAM), a NOR Flash, a first RS485 and Modbus interface, a second RS485 and Modbus interface and a third RS485 and Modbus interface, wherein the signal output end of the power/reset circuit is connected with the signal input end of the ARM microprocessor; the signal output end of the ARM microprocessor is connected with the signal input end of the standby link; and the ARM microprocessor is also connected with the UI circuit, the SDRAM, the NOR Flash, the first RS485 and Modbus interface, the second RS485 and Modbus interface and the third RS485 and Modbus interface. The communication converter has the advantages that by using the ARM microprocessor as a core and using a peripheral hardware interface circuit, two pieces of master station equipment can simultaneously acquire data on an RS485 and Modbus bus, so the data which are acquired by each master station are original and real.
Description
Technical field
The present invention relates to the industrial field bus communication technical field, realized a kind of support RS485﹠amp; The communication converter of many main websites of Modbus data acquisition.
Background technology
The Modbus serial protocol is proposed in 1979 by Modicon company at first, is first real bus protocol that is used for industry spot of the whole world, has been one of most popular universal industrial standard agreement in the industrial circle whole world now.
The MS master-slave technology is used in the Modbus serial communication, namely at a RS485﹠amp; Only allow to exist between a home site and a plurality of slave site on the Modbus bus to carry out digital communication, this MS master-slave communication protocol of Modbus has determined can only exist at any time a main website to carry out data acquisition.
In industrial processes control or data acquisition system, such as different DCS systems, PLC system etc., a plurality of home sites need simultaneously from a RS485﹠amp; The situation of image data is a lot of on the Modbus bus, and addressing this is that present general way is to allow a website as home site, after its image data, sends to other website through communication again.But this method can not avoid data in the adapter ring festival-gathering by the people for distorting, can't guarantee primitiveness and the authenticity of data, be difficult to data primitiveness and the exigent occasion of authenticity (such as customs supervision) are being used.Thereby exploitation can realize RS485﹠amp; The communication converter of many main websites of Modbus data acquisition has high using value.
Summary of the invention
A kind of RS485﹠amp of many main websites provided by the invention; The Modbus data acquisition equipment, it can realize that a plurality of main websites gather a RS485﹠amp simultaneously; Data on the Modbus bus adopt general hardware interface circuit, have the characteristics such as real-time, that use is flexible.
For achieving the above object a kind of support RS485﹠amp provided by the invention; The communication converter of many main websites of Modbus data acquisition, it comprises: ARM microprocessor, power supply/reset circuit, reserve link, UI circuit, SDRAM, NORFLASH, a RS485﹠amp; Modbus interface, the 2nd RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface, the signal output part of described power supply/reset circuit links to each other with the signal input part of ARM microprocessor, the signal output part of ARM microprocessor links to each other with the signal input part of reserve link, the ARM microprocessor also with UI circuit, SDRAM, NORFLASH, a RS485﹠amp; Modbus interface, the 2nd RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface is connected, wherein a RS485﹠amp; Modbus interface and the 2nd RS485﹠amp; The Modbus interface is respectively applied to link to each other the 3rd RS485﹠amp with two main websites; The Modbus interface links to each other with the field instrument bus, described ARM microprocessor comprises: profile module, slave station A module, slave station B module, image data module, acquisition management module, Modbus protocol stack module and master station module, described slave station A module and slave station B module respectively with a RS485﹠amp; Modbus interface and the 2nd RS485﹠amp; The Modbus interface links to each other, and from corresponding main website acquisition signal, and this command signal is issued to the acquisition management module, and the acquisition management module is issued to master station module with command signal, master station module with the command signal that collects by the 3rd RS485﹠amp; The Modbus interface is issued to each instrument, and reads corresponding request msg from instrument, and instrumented data returns to the image data module by the acquisition management module, and the image data module writes corresponding slave station data field with the instrumented data that returns.
A kind of support RS485﹠amp; The communication converter of many main websites of Modbus data acquisition, it is that a plurality of main websites that realize as follows gather a RS485﹠amp simultaneously; Data on the Modbus bus:
A, device power, power supply/reset circuit provide equipment work required each road power supply, and institute's solidification software code among the operation NORFLASH resets and operational system;
After B, the normal operation of system, by computer equipment is carried out the basic parameter configuration;
After C, the configuration successful, slave station modules A and slave station module B are by constantly reading its corresponding RS485﹠amp; The Modbus interface data, whether detect corresponding main website has order to issue;
If D detects the A of main website or the B of main website has data distributing, then with behind this data receiver, deposit in SDRAM, call the Modbus parsing module, according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " these data are resolved, if these data are legal Modbus order, then this instruction are forwarded to the acquisition management module, and wait for this command response frame; If detect the A of main website and B data distributing is arranged simultaneously, then the priority according to system's setting decides the sequencing that reads;
E, acquisition management module are forwarded to master station module with slave station modules A and slave station module Modbus that B issues order, and the wait master station module is returned this command response frame;
F, master station module will be issued to instrument from the Modbus order that the acquisition management module is obtained, after waiting for instrument response, read the response frame of this Modbus order from instrument, to after this response frame verification succeeds, this Modbus command response frame is sent to the acquisition management module according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " defined method of calibration;
G, acquisition management module send the so far corresponding slave station module of frame with reading Modbus command response frame;
Whether H, slave station modules A and slave station module B are sent to separately corresponding Modbus main website with Modbus with response frame, and continue to detect corresponding main website and have order to issue, and return step D.
Described reserve link comprises supervisory circuit and relay, the signal input part of described supervisory circuit links to each other with the signal output part of ARM microprocessor, the signal output part of supervisory circuit links to each other with the coil a of relay, the normally opened contact b of relay respectively with ARM microprocessor and the 3rd RS485﹠amp; The Modbus interface is connected, the normally-closed contact c of relay respectively with a RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface is connected, when system exception, and the output of ARM microprocessor no signal, coil a outage, normally opened contact b disconnects, and normally-closed contact c is closed, and the field instrument bus directly links to each other with the A of main website, guarantees the normal collection of data.
Be provided with indicator light on the described UI circuit, after the system configuration success, the UI circuit is notified the user configuration successful by this indicator light.
What described ARM microprocessor adopted is the AT91RM9200 chip.
The ARM microprocessor is responsible for supervision and the control of whole communication converter;
Power supply/reset circuit provides power supply and reseting logic for communication converter, and wherein reset circuit is realized the external reset function when converter system collapses;
Reserve link when the communication converter fault, the direct RS485﹠amp that communicates by letter with instrument of handle; Two lines of Modbus interface, a pair of normally-closed contact by auxiliary relay automatically switches to the RS485﹠amp with the main website devices communicating; On the bus of Modbus interface, provide interim emergency communication measure;
Various operating states when the UI circuit moves for user's prompt facility;
SDRAM provides memory headroom for system's operation;
NORFLASH is as external memory storage, for code is solidified in system, the power down save data provides memory space;
The one RS485﹠amp; Modbus interface and the 2nd RS485﹠amp; The Modbus interface is responsible for and two main website devices communicatings, the 3rd RS485﹠amp; The Modbus interface is responsible for communicating by letter with far distance instrument;
Profile module is used for configuration device file, and configuration file comprises the instrumentation tap parameter, transducer master mouth parameter, and transducer is from the mouth parameter etc., and configuration file is burnt to be preserved among the NORFLASH;
The data that image data module stores master station module gathers;
The Modbus acquisition that acquisition management module management slave station A module and slave station B module issue, and the data of management main website collection are upgraded the data in the image data module;
The Modbus protocol stack module is resolved the communications protocol of Modbus master station module and slave station A module and slave station B module;
What master station module was taked is the command area of thread continuous poll slave station A and slave station B; If there is effective order in discovery in the command area, then this order is issued to the Modbus bus; After reading correct instrumented data, the data of returning instrument are write the data field of corresponding slave station.
The method that the present invention utilizes hardware circuit and software circuit to combine has realized the RS485﹠amp of many main websites; The Modbus data acquisition, particularly, the present invention has following beneficial effect:
1. realized that two Modbus main websites gather a RS485﹠amp simultaneously; The function of the data on the Modbus bus has guaranteed primitiveness and the authenticity of each website image data, prevent data in intermediate link by the people for distorting.
2. realized in communication converter faults itself situation, realized automatically switching to the function of main website by reserve link.
Description of drawings
Fig. 1 is for supporting RS485﹠amp; The structural representation of the communication converter application system of many main websites of Modbus data acquisition.
Fig. 2 is for supporting RS485﹠amp; The modular structure figure of many main websites of Modbus data acquisition communication converter.
Fig. 3 is for supporting RS485﹠amp; The structural representation of the reserve link of many main websites of Modbus data acquisition communication converter.
Fig. 4 is for supporting RS485﹠amp; The workflow diagram of many main websites of Modbus data acquisition communication converter.
Embodiment
Below in conjunction with instantiation and accompanying drawing, the present invention is described in detail, and the ARM microprocessor adopts AT91RM9200, SDRAM to adopt K4S561632C, NORFLASH to adopt 28F128J3A in the present embodiment.
As shown in Figure 1, 2, a kind of support RS485﹠amp; The communication converter of many main websites of Modbus data acquisition, it comprises: ARM microprocessor, power supply/reset circuit, reserve link, UI circuit, SDRAM, NORFLASH, a RS485﹠amp; Modbus interface, the 2nd RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface, the signal output part of described power supply/reset circuit links to each other with the signal input part of ARM microprocessor, the signal output part of ARM microprocessor links to each other with the signal input part of reserve link, the ARM microprocessor also with UI circuit, SDRAM, NORFLASH, a RS485﹠amp; Modbus interface, the 2nd RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface is connected, wherein a RS485﹠amp; Modbus interface and the 2nd RS485﹠amp; The Modbus interface is respectively applied to link to each other the 3rd RS485﹠amp with two main websites; The Modbus interface links to each other with the field instrument bus, described ARM microprocessor comprises: profile module, slave station A module, slave station B module, image data module, acquisition management module, Modbus protocol stack module and master station module, described slave station A module and slave station B module respectively with a RS485﹠amp; Modbus interface and the 2nd RS485﹠amp; The Modbus interface links to each other, and from corresponding main website acquisition signal, and this command signal is issued to the acquisition management module, and the acquisition management module is issued to master station module with command signal, master station module with the command signal that collects by the 3rd RS485﹠amp; The Modbus interface is issued to each instrument, and reads corresponding request msg from instrument, and instrumented data returns to the image data module by the acquisition management module, and the image data module writes corresponding slave station data field with the instrumented data that returns.
In the present embodiment with Distributed Control System (DCS) as the A of main website, Programmable Logic Controller (PLC) as the B of main website simultaneously from the field instrument image data, instrument 1,2 ... N etc. are generally field instrument, such as temperature sensor, pressure sensor, liquid level sensor etc.
Shown in Fig. 3,4, after device power, power supply/reset circuit provides each required road power supply of work whole system that resets simultaneously for whole equipment, institute's solidification software code among the operation NORFLASH, operational system.After the normal operation of system, according to DCS, PLC and instrument communication relevant parameter, by man-machine interface equipment is carried out basic parameter configuration, three groups of RS485﹠amp of initialization; The communications parameters such as the baud rate of Modbus bus, data bit, check digit, position of rest, after the configuration successful, the UI circuit is notified the user configuration successful by indicator light.
Slave station modules A after the configuration successful in the Modbus of the many main websites data acquisition communication converter and slave station module B are by constantly reading its corresponding RS485﹠amp; The Modbus interface data, whether detect corresponding main website has order to issue; If detect the A of main website data distributing is arranged, behind this data receiver, deposit in SDRAM, call the Modbus parsing module, according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " these data are resolved, if these data are legal Modbus order, then this instruction are forwarded to the acquisition management module, and wait for this command response frame; The acquisition management module is forwarded to master station module with slave station modules A and slave station module Modbus that B issues order successively, and the wait master station module is returned this command response frame; Master station module will be issued to instrument from the Modbus order that the acquisition management module is obtained, wait for that instrument response is after the time, read the response frame of this Modbus order from instrument, to after this response frame verification succeeds, this Modbus command response frame is sent to the acquisition management module according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " defined method of calibration; The acquisition management module sends the so far corresponding Modbus order of frame with reading Modbus command response frame and issues the slave station module; Slave station modules A and slave station module B are sent to separately Modbus main website equipment (DCS and PCL) with the Modbus response frame, and whether the corresponding main website of continuation detection has data distributing.
Reserve link comprises supervisory circuit and relay, the signal input part of described supervisory circuit links to each other with the signal output part of ARM microprocessor, the signal output part of supervisory circuit links to each other with the coil a of relay, the normally opened contact b of relay respectively with ARM microprocessor and the 3rd RS485﹠amp; The Modbus interface is connected, the normally-closed contact c of relay respectively with a RS485﹠amp; Modbus interface and the 3rd RS485﹠amp; The Modbus interface is connected.When system worked, the normally opened contact b of the relay in the stand-by circuit was in closure state, and normally-closed contact c is in off-state; When system works is unusual, supervisory circuit in the reserve link does not receive the signal from the ARM microprocessor, coil a outage, the normally opened contact b of relay disconnects, normally-closed contact c is closed, the A of main website directly is connected with the field instrument bus, guarantees the corresponding DCS equipment normal operation of the A of main website, realize the normal collection of data.
Claims (5)
1. support RS485﹠amp; The communication converter of many main websites of Modbus data acquisition is characterized in that it comprises: ARM microprocessor (1), power supply/reset circuit (2), reserve link (3), UI circuit (4), SDRAM, NORFLASH, a RS485﹠amp; Modbus interface (71), the 2nd RS485﹠amp; Modbus interface (72) and the 3rd RS485﹠amp; Modbus interface (73), the signal output part of described power supply/reset circuit (2) links to each other with the signal input part of ARM microprocessor (1), the signal output part of ARM microprocessor (1) links to each other with the signal input part of reserve link (3), ARM microprocessor (1) also with UI circuit (4), SDRAM, NORFLASH, a RS485﹠amp; Modbus interface (71), the 2nd RS485﹠amp; Modbus interface (72) and the 3rd RS485﹠amp; Modbus interface (73) is connected, wherein a RS485﹠amp; Modbus interface (71) and the 2nd RS485﹠amp; Modbus interface (72) is respectively applied to link to each other the 3rd RS485﹠amp with two main websites; Modbus interface (73) links to each other with the field instrument bus, described ARM microprocessor (1) comprising: profile module, slave station A module, slave station B module, image data module, acquisition management module, Modbus protocol stack module and master station module, described slave station A module and slave station B module respectively with a RS485﹠amp; Modbus interface (71) and the 2nd RS485﹠amp; Modbus interface (72) links to each other, from corresponding main website acquisition signal, and this command signal is issued to the acquisition management module, the acquisition management module is issued to master station module with command signal, master station module with the command signal that collects by the 3rd RS485﹠amp; The Modbus interface is issued to each instrument, and reads corresponding request msg from instrument, and instrumented data returns to the image data module by the acquisition management module, and the image data module writes corresponding slave station data field with the instrumented data that returns.
2. support RS485﹠amp; The communication converter of many main websites of Modbus data acquisition is characterized in that it is that a plurality of main websites that realize as follows gather a RS485﹠amp simultaneously; Data on the Modbus bus:
A, device power, power supply/reset circuit (2) provide equipment work required each road power supply, and institute's solidification software code among the operation NORFLASH resets and operational system;
After B, the normal operation of system, by computer equipment is carried out the basic parameter configuration;
After C, the configuration successful, slave station modules A and slave station module B are by constantly reading its corresponding RS485﹠amp; The Modbus interface data, whether detect corresponding main website has order to issue;
If D detects the A of main website or the B of main website has data distributing, then with behind this data receiver, deposit in SDRAM, call the Modbus parsing module, according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " these data are resolved, if these data are legal Modbus order, then this instruction are forwarded to the acquisition management module, and wait for this command response frame; If detect the A of main website and B data distributing is arranged simultaneously, then the priority according to system's setting decides the sequencing that reads;
E, acquisition management module are forwarded to master station module with slave station modules A and slave station module Modbus that B issues order, and the wait master station module is returned this command response frame;
F, master station module will be issued to instrument from the Modbus order that the acquisition management module is obtained, after waiting for instrument response, read the response frame of this Modbus order from instrument, to after this response frame verification succeeds, this Modbus command response frame is sent to the acquisition management module according to " GBZ 19582.2-2004 is based on the industrial automation network standard of Modbus agreement " defined method of calibration;
G, acquisition management module send the so far corresponding slave station module of frame with reading Modbus command response frame;
Whether H, slave station modules A and slave station module B are sent to separately corresponding Modbus main website with Modbus with response frame, and continue to detect corresponding main website and have order to issue, and return step D.
3. a kind of support RS485﹠amp according to claim 1; The communication converter of many main websites of Modbus data acquisition, it is characterized in that described reserve link (3) comprises supervisory circuit and relay, the signal input part of described supervisory circuit links to each other with the signal output part of ARM microprocessor, the signal output part of supervisory circuit links to each other with the coil a of relay, the normally opened contact b of relay respectively with ARM microprocessor and the 3rd RS485﹠amp; Modbus interface (73) is connected, the normally-closed contact c of relay respectively with a RS485﹠amp; Modbus interface (71) and the 3rd RS485﹠amp; Modbus interface (73) is connected, when system exception, and the output of ARM microprocessor no signal, coil a outage, normally opened contact b disconnects, and normally-closed contact c is closed, and the field instrument bus directly links to each other with the A of main website, guarantees the normal collection of data.
4. a kind of support RS485﹠amp according to claim 1; The communication converter of many main websites of Modbus data acquisition is characterized in that being provided with indicator light on the described UI circuit (4), and after the system configuration success, UI circuit (4) is notified the user configuration successful by this indicator light.
5. a kind of support RS485﹠amp according to claim 1; The communication converter of many main websites of Modbus data acquisition, what it is characterized in that described ARM microprocessor (1) employing is the AT91RM9200 chip.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207866A (en) * | 2015-10-26 | 2015-12-30 | 珠海格力电器股份有限公司 | Communication method of control terminal based on air conditioner control network and air conditioner control network |
| CN109067630A (en) * | 2018-10-16 | 2018-12-21 | 苏州琅润达检测科技有限公司 | A kind of serial data communication link branch cooperative control device |
| CN109309610A (en) * | 2018-11-15 | 2019-02-05 | 威胜电气有限公司 | Double terminal telecommunication circuits and its communication means |
| CN110502467A (en) * | 2019-07-25 | 2019-11-26 | 江苏诺蓝翌新能源科技有限公司 | A kind of general acquisition interface software systems based on serial ports modbus communication protocol |
| CN111327503A (en) * | 2020-03-10 | 2020-06-23 | 浙江明度智控科技有限公司 | MODBUS bus-based multi-master-station token scheduling device, communication method and system |
| CN113064723A (en) * | 2021-03-23 | 2021-07-02 | 瀚云科技有限公司 | Storage medium, electronic device, bus resource allocation method and device |
| CN114745223A (en) * | 2022-03-22 | 2022-07-12 | 深圳市合广测控技术有限公司 | Multi-slave station management method and device, electronic equipment and storage medium |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050276114A1 (en) * | 2004-06-11 | 2005-12-15 | Mitsubishi Denki Kabushiki Kaisha | Electronic control unit |
| CN101425948A (en) * | 2008-10-23 | 2009-05-06 | 上海大学 | Industrial wireless network access industrial Ethernet, multi-protocol gateway of field bus and protocol conversion method |
| CN102223275A (en) * | 2011-06-24 | 2011-10-19 | 浙江亚卫通科技有限公司 | Long-distance communication bus |
-
2012
- 2012-10-15 CN CN201210387472.8A patent/CN102932222B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050276114A1 (en) * | 2004-06-11 | 2005-12-15 | Mitsubishi Denki Kabushiki Kaisha | Electronic control unit |
| CN101425948A (en) * | 2008-10-23 | 2009-05-06 | 上海大学 | Industrial wireless network access industrial Ethernet, multi-protocol gateway of field bus and protocol conversion method |
| CN102223275A (en) * | 2011-06-24 | 2011-10-19 | 浙江亚卫通科技有限公司 | Long-distance communication bus |
Non-Patent Citations (1)
| Title |
|---|
| 戴尔晗: "基于MODBUS协议的多主站技术", 《自动化与仪表》 * |
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| CN105207866B (en) * | 2015-10-26 | 2019-03-05 | 珠海格力电器股份有限公司 | Communication method of control terminal based on air conditioner control network and air conditioner control network |
| CN105207866A (en) * | 2015-10-26 | 2015-12-30 | 珠海格力电器股份有限公司 | Communication method of control terminal based on air conditioner control network and air conditioner control network |
| CN109067630A (en) * | 2018-10-16 | 2018-12-21 | 苏州琅润达检测科技有限公司 | A kind of serial data communication link branch cooperative control device |
| CN109309610B (en) * | 2018-11-15 | 2024-04-12 | 威胜能源技术股份有限公司 | Dual-terminal communication circuit and communication method thereof |
| CN109309610A (en) * | 2018-11-15 | 2019-02-05 | 威胜电气有限公司 | Double terminal telecommunication circuits and its communication means |
| CN110502467A (en) * | 2019-07-25 | 2019-11-26 | 江苏诺蓝翌新能源科技有限公司 | A kind of general acquisition interface software systems based on serial ports modbus communication protocol |
| CN111327503A (en) * | 2020-03-10 | 2020-06-23 | 浙江明度智控科技有限公司 | MODBUS bus-based multi-master-station token scheduling device, communication method and system |
| CN111327503B (en) * | 2020-03-10 | 2022-03-01 | 明度智云(浙江)科技有限公司 | MODBUS bus-based multi-master-station token scheduling device, communication method and system |
| CN113064723A (en) * | 2021-03-23 | 2021-07-02 | 瀚云科技有限公司 | Storage medium, electronic device, bus resource allocation method and device |
| CN113064723B (en) * | 2021-03-23 | 2024-05-24 | 瀚云科技有限公司 | Storage medium, electronic device, bus resource allocation method and device |
| CN114745223A (en) * | 2022-03-22 | 2022-07-12 | 深圳市合广测控技术有限公司 | Multi-slave station management method and device, electronic equipment and storage medium |
| CN116566762A (en) * | 2023-07-07 | 2023-08-08 | 武汉亚为电子科技有限公司 | Cascading equipment based on Modbus-RTU protocol and application method thereof |
| CN116566762B (en) * | 2023-07-07 | 2023-10-20 | 武汉亚为电子科技有限公司 | Cascading equipment based on Modbus-RTU protocol and application method thereof |
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