CN201732276U - Attached on-the-spot intelligent instrument bus communication interface module - Google Patents
Attached on-the-spot intelligent instrument bus communication interface module Download PDFInfo
- Publication number
- CN201732276U CN201732276U CN2009202087324U CN200920208732U CN201732276U CN 201732276 U CN201732276 U CN 201732276U CN 2009202087324 U CN2009202087324 U CN 2009202087324U CN 200920208732 U CN200920208732 U CN 200920208732U CN 201732276 U CN201732276 U CN 201732276U
- Authority
- CN
- China
- Prior art keywords
- communication interface
- hart
- unit
- intelligent instrument
- interface module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model provides an attached on-the-spot intelligent instrument bus communication interface module, applied in a process control system module and the HART protocol communication system of a on-the-spot intelligent instrument, wherein, the process control system module is provided with a master control circuit and a HART modulation and demodulation unit. The attached on-the-spot intelligent instrument bus communication interface module at least comprises a communication interface unit, a HART communication unit, a V / I conversion unit and a transmitting unit, wherein, the communication interface unit is electrically connected the master control circuit; the Hart communication unit is used for converting the HART order into a FSK carrier voltage signal and then outputting the signal and selecting the corresponding HART access through the master control circuit; the V / I conversion unit is used for receiving the FSK carrier voltage signal transmitted by the HART communication unit and converting the signal into a current signal; the transmitting unit is used for transmitting the current signal to the HART modulation and demodulation unit for bidirectional digital communication. The modules of the utility model enhance the functions of the conventional magnitude of current and the security of the system, reduce the labor cost and the equipment cost and improve the response speed.
Description
Technical field
The utility model relates to a kind of industrial process control system and field bus communication field, particularly relates to a kind of adhesion type field intelligent instrument bus communication interface module.
Background technology
Process Control System (process control systems) is by the control to process variable, and output increase, the quality of product in the production run are improved and the energy consumption minimizing.Because described Process Control System has in time, accurately reaches advantages such as intelligence, is widely used in for example industries such as oil, chemical industry, electric power, metallurgy.Process Control System commonly used at present is DCS and PLC normally, the structural arrangements comparing class of these two kinds of Process Control Systems seemingly, the equipment of target endpoint (for example module or fastener), all be by one or a plurality of data bus, be connected on the data bus interface of one or more controller, be delivered in controller and the upper system of workstation by the process variable data of bus target endpoint, the major function of controller and the upper system of workstation, be to realize the monitoring process variable, by controlled variable or control algolithm, different process variable is adjusted then.
No matter be distribution on the logical level or the distribution on the physical level, controller equiment all must be connected on many electronic monitoring equipments and field device that spreads all over that whole process distributes.Traditional electronic monitoring equipment and field device mostly adopt the analog quantity transmission manner, form regardless of source signal, the capital is converted to and is original voltage or current signal, be delivered on the interface of target endpoint, change by the circuit of target endpoint last layer then, or be delivered on the data bus through communication interface after handling by CPU.
Along with popularizing of smart fields instrument, the use of present industry spot intelligence instrument is more and more, and is different with traditional analog quantity transmission manner, and field intelligent instrument utilizes digital signal to carry out the communication transmission.Compared to traditional analog quantity transmission mode, its advantage is can connect a plurality of equipment on same bus, except gathering source signal by instrument, can also pass through data bus, read or revise the parameter of field intelligent instrument, thereby realize this locality configuration and signals collecting remote field intelligent instrument.The mode that present comparative maturity in the world is used for field intelligent instrument is HART (Highway Addressable Remote Transducer, i.e. the open communication agreement of highway addressable remote transducer).The 4-20mA current delivery technology of traditional two-wire system is adopted in primary variables and control information in this HART protocol communication, by modulation to current signal, the electric current fsk signal of a low speed on the line superposes, comprising detection, calibration, information diagnosis, procedure parameter modification and device configuration, all is to operate by this HART agreement.
Process Control System is in order to be connected with the field intelligent instrument of the type, and what generally adopt is protocol gateway equipment.Protocol gateway equipment is a kind of separate equipment device, by microprocessor and circuit Physical layer, protocol layer and the application layer of different agreement are changed, the Process Control System data translation is become the discernible data of field intelligent instrument, thereby carry out data communication.So, the shortcoming of this kind connected mode is: the first, and protocol gateway equipment is a separate equipment, is that independent research or purchase finished product are all very expensive; The second, the distribution situation of field intelligent instrument is irregular, must independently install; The 3rd, field intelligent instrument adopts the communication modes image data, and the renewal frequency of data is with the communication speed benchmark, and in other words communication speed is fast more, Data Update fast more, and the communication speed of HART instrument is 1200 bps, renewal speed is slow partially.
Thereby, between the shortcoming of above-mentioned connected mode, how to realize that a kind of cost is lower, connect the easier while energy mode of response data fast, and solve the disappearance that exists in the prior art, the real problem that needs to be resolved hurrily that become.
Summary of the invention
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of adhesion type field intelligent instrument bus communication interface module, with under the situation that does not increase microprocessor and extra wiring, realize the communication of lower cost, and make the easier while energy of connection response data fast the field intelligent instrument bus.
Reach other relevant purposes for achieving the above object, the utility model provides a kind of adhesion type field intelligent instrument bus communication interface module, it is applied in the HART protocol communication system of Process Control System module and field intelligent instrument, described Process Control System module has governor circuit and HART modem module, it is characterized in that described adhesion type field intelligent instrument bus communication interface module comprises at least: communication interface unit, HART communication unit, V/I converting unit and retransmission unit.Wherein, described communication interface unit is electrically connected at described governor circuit; Described HART communication unit is electrically connected at described communication interface unit, export after changing FSK carrier voltage signal in order to the HART order that described governor circuit is sent by described communication interface unit, and corresponding HART path is selected by described governor circuit; Described V/I converting unit is electrically connected at described HART communication unit, in order to behind the FSK carrier voltage signal that receives the transmission of described HART communication unit with its switching current signal; Described retransmission unit is electrically connected at described V/I converting unit, in order to described current signal is forwarded to described HART modem module, to carry out the bi-directional digital communication.
As mentioned above, adhesion type field intelligent instrument bus communication interface module of the present utility model compared with prior art uses adhesion type field intelligent instrument bus communication interface module of the present utility model to have following several advantage: promptly volume is little, cost is low, flexible for installation, save wiring cost and human cost.With under the situation that does not increase microprocessor and extra wiring, realize the communication of lower cost, and make the easier while energy of connection response data fast, so the utility model has effectively overcome various shortcoming of the prior art to the field intelligent instrument bus.
Description of drawings
Fig. 1 is shown as adhesion type field intelligent instrument bus communication interface module application architecture synoptic diagram of the present utility model.
The simple declaration of element numbers:
1 Process Control System module
11 governor circuits
111 microprocessors
112 expansion communication interfaces
12 HART modem modules
13 splicing ears
2 communication interface modules
21 communication interface units
22 HART communication units
23 V/I converting units
24 retransmission units
241 buffer circuits
242 on-off circuits
3 bases
4 signal cables
5 field bus devices
Embodiment
Below by specific instantiation embodiment of the present utility model is described, those skilled in the art can understand other advantages of the present utility model and effect easily by the content that this instructions disclosed.The utility model can also be implemented or be used by other different embodiment, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present utility model not deviating from.
See also Fig. 1, Fig. 1 is shown as adhesion type field intelligent instrument bus communication interface module application architecture synoptic diagram of the present utility model, Fig. 1 and only with the signal mode basic conception of the present utility model is described, its assembly layout kenel also may be more complicated.
As shown in the figure, the utility model provides a kind of adhesion type field intelligent instrument bus communication interface module 2, (for convenience of description, in embodiment, abbreviate communication interface module 2 as), described communication interface module 2 is applied in the HART protocol communication system of Process Control System module 1 and field intelligent instrument, described Process Control System module 1 has governor circuit 11 and HART modem module 12, in present embodiment, described master control electricity 11 tunnel expansion communication interfaces 112 that have microprocessor 111 and connect described microprocessor 111; Described HART modem module is the HART modem chip.In present embodiment, described Process Control System module 1 also comprises a splicing ear 13, and described splicing ear 13 is electrically connected on the field bus device 5 by a signal cable 4.
Adhesion type field intelligent instrument bus communication interface module 2 of the present utility model comprises at least: communication interface unit 21, HART communication unit 22, V/I converting unit 23 and retransmission unit 24.
Described communication interface unit 21 is electrically connected at described governor circuit 11, and particularly, described communication interface unit 21 is electrically connected on the described expansion communication interface 112, and in present embodiment, described communication interface unit 21 is a connector.
Described HART communication unit 22 is electrically connected at described communication interface unit 21, export after changing FSK carrier voltage signal in order to the HART order that described governor circuit 11 is sent by described communication interface unit 21, and select by 11 pairs of corresponding HART paths of described governor circuit, particularly, described HART communication unit is selected corresponding HART path by described microprocessor.In present embodiment, described HART communication unit 22 is HART communication chip HM1200.
Described V/I converting unit 23 is electrically connected at described HART communication unit 22, in order to behind the FSK carrier voltage signal that receives described HART communication unit 22 transmissions with its switching current signal, in present embodiment, described V/I converting unit 23 converts thereof into after receiving the FSK carrier voltage signal of described HART communication unit 22 transmissions ± current signal of 0.5mA.
Described retransmission unit 24 is electrically connected at described V/I converting unit 23, in order to described current signal is forwarded to described HART modem module 12, to carry out the bi-directional digital communication.In present embodiment, described retransmission unit 24 includes buffer circuit 241 and on-off circuit 242, and more specifically, described on-off circuit 242 is No. 8 electronic switches.
In sum, as shown in Figure 1, described communication interface module 2 is applied in the HART protocol communication system of Process Control System module 1 and field intelligent instrument, host computer (not shown) is published to the HART order on the object procedure control system module 1 by fieldbus, resolve by the microprocessor 111 on the described Process Control System module 1, the serial ports of described microprocessor 111 is connected on the serial ports of described HART communication unit 22 via described communication interface unit 21, control by described microprocessor 111 again, described communication interface unit 21 receives the HART order that serial ports sends, and change these orders into FSK carrier voltage signal, these voltage signals are converted to ± current signal of 0.5mA via described V/I converting unit 23, be forwarded on the corresponding passage by buffer circuit 241 and electronic switch 242, the stack amplitude is that the audio digital signals of 0.5mA carries out the bi-directional digital communication on the 4-20mA of low frequency simulating signal.Because the mean value of fsk signal is 0, does not influence the size that sends the control system simulating signal to, has guaranteed the compatibility with existing simulation system.
In the embodiment of reality, main variables and control information are transmitted by the 4-20mA simulating signal in the HART protocol communication, and under the situation of needs, measurement in addition, procedure parameter, device configuration, calibration, diagnostic message are by the HART protocol access.Microprocessor 111 can be replied by this passage wait field intelligent instrument of locking.After field intelligent instrument receives order, directly communication interface module 2 is replied, the HART communication chip HM1200 of communication interface module 2 exports after the FSK carrier signal is converted to rs 232 serial interface signal, is forwarded to host computer by described microprocessor 111.
Adhesion type field intelligent instrument bus communication interface module 2 of the present utility model can be as required, directly insert on the communication interface unit 21 of General Current amount capture card correspondence, capture card control and processing section can pick out the access of module voluntarily, and start corresponding treatment progress.Whole capture card is connected on the described base 3, and need not increase any periphery circuit, still uses original signal cable 4, connects on the field bus device 5.Do not influence simultaneously the high-speed real-time collection of channel data.
Adhesion type field intelligent instrument bus communication interface module of the present utility model compared with prior art uses adhesion type field intelligent instrument bus communication interface module of the present utility model to have following several advantage: promptly volume is little, cost is low, flexible for installation, save wiring cost and human cost.With under the situation that does not increase microprocessor and extra wiring, realize the communication of lower cost to the field intelligent instrument bus, and make the easier while energy of connection response data fast, so the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is illustrative principle of the present utility model and effect thereof only, but not is used to limit the utility model.Any personage who has the knack of this technology all can be under spirit of the present utility model and category, and the foregoing description is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of being finished under spirit that the utility model discloses and the technological thought, must be contained by claim described later.
Claims (10)
1. adhesion type field intelligent instrument bus communication interface module, it is applied in the HART protocol communication system of Process Control System module and field intelligent instrument, described Process Control System module has governor circuit and HART modem module, it is characterized in that described adhesion type field intelligent instrument bus communication interface module comprises at least:
Communication interface unit is electrically connected at described governor circuit;
The HART communication unit, be electrically connected at described communication interface unit, export after changing FSK carrier voltage signal in order to the HART order that described governor circuit is sent by described communication interface unit, and corresponding HART path is selected by described governor circuit;
The V/I converting unit is electrically connected at described HART communication unit, in order to behind the FSK carrier voltage signal that receives the transmission of described HART communication unit with its switching current signal; And
Retransmission unit is electrically connected at described V/I converting unit, in order to described current signal is forwarded to described HART modem module, to carry out the bi-directional digital communication.
2. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1 is characterized in that: the expansion communication interface that described governor circuit has microprocessor and connects described microprocessor.
3. adhesion type field intelligent instrument bus communication interface module as claimed in claim 2, it is characterized in that: described communication interface unit is electrically connected at described expansion communication interface.
4. adhesion type field intelligent instrument bus communication interface module as claimed in claim 2, it is characterized in that: described HART communication unit is selected corresponding HART path by described microprocessor.
5. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1 is characterized in that: described V/I converting unit converts thereof into after receiving the FSK carrier voltage signal of described HART communication unit transmission ± and the current signal of 0.5mA.
6. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1, it is characterized in that: described retransmission unit includes buffer circuit and on-off circuit.
7. adhesion type field intelligent instrument bus communication interface module as claimed in claim 6, it is characterized in that: described on-off circuit is No. 8 electronic switches.
8. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1, it is characterized in that: described communication interface unit is a connector.
9. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1 is characterized in that: described HART communication unit is HART communication chip HM1200.
10. adhesion type field intelligent instrument bus communication interface module as claimed in claim 1, it is characterized in that: described HART modem module is the HART modem chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202087324U CN201732276U (en) | 2009-08-31 | 2009-08-31 | Attached on-the-spot intelligent instrument bus communication interface module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202087324U CN201732276U (en) | 2009-08-31 | 2009-08-31 | Attached on-the-spot intelligent instrument bus communication interface module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732276U true CN201732276U (en) | 2011-02-02 |
Family
ID=43523434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202087324U Expired - Fee Related CN201732276U (en) | 2009-08-31 | 2009-08-31 | Attached on-the-spot intelligent instrument bus communication interface module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094605A (en) * | 2016-02-04 | 2016-11-09 | 北京安控科技股份有限公司 | A kind of HART multichannel switching circuit and method |
-
2009
- 2009-08-31 CN CN2009202087324U patent/CN201732276U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094605A (en) * | 2016-02-04 | 2016-11-09 | 北京安控科技股份有限公司 | A kind of HART multichannel switching circuit and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102073314B (en) | Device and method for communicatively coupling field devices to a controller in a process control system | |
| KR101292956B1 (en) | Analog input module | |
| CN206575438U (en) | A kind of vehicle-mounted ethernet test modular converter and test system based on BroadR Reach | |
| CN201974184U (en) | Multifunctional template of intelligentized bus interface | |
| CN207408770U (en) | General Internet of Things centralized monitoring system | |
| CN209590642U (en) | The conversion of underwater robot information and processing system | |
| CN201732276U (en) | Attached on-the-spot intelligent instrument bus communication interface module | |
| CN207652476U (en) | A kind of support multi-protocol link moisture acquisition server equipment | |
| CN106546284A (en) | A kind of home environment health detection multifunction system based on Internet of Things | |
| CN203552252U (en) | Data conversion device based on internet of things | |
| CN204612811U (en) | Support the intelligent multi-channel temperature transmitter of FF agreement | |
| US20140031955A1 (en) | Connecting device, system and method for signal transmission between a control center and at least one field device in an industrial installation | |
| CN115567348A (en) | Edge gateway device with multiple adaptive capabilities and electronic equipment | |
| CN201654555U (en) | Intelligent node module system applied to industrial valve control | |
| CN202145647U (en) | Protocol converter | |
| CN103176435B (en) | Realize the interface arrangement and method of dcs and measuring apparatus interconnection | |
| CN205563551U (en) | A auto -change over device able to programme for RS232 and RS485 | |
| CN107592286A (en) | A kind of intelligent communications terminal and its implementation for supporting multi-protocols | |
| CN107707558B (en) | Data transmission system of multi-industry bus | |
| CN104614042A (en) | Guided wave radar level meter | |
| CN202404431U (en) | Input interface device realizing interconnection between distributed control system and measurement equipment | |
| CN207081991U (en) | A kind of bus-type actuator control module based on HART protocol | |
| CN206594515U (en) | A kind of DCS system HART Analog input mModules | |
| CN205593599U (en) | Intelligence water level changer system based on IEC61850 standard | |
| CN214751425U (en) | Data acquisition and communication device for detecting instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20120831 |