CN102722168A - Method for controlling field equipment and control system - Google Patents
Method for controlling field equipment and control system Download PDFInfo
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- CN102722168A CN102722168A CN2012102240212A CN201210224021A CN102722168A CN 102722168 A CN102722168 A CN 102722168A CN 2012102240212 A CN2012102240212 A CN 2012102240212A CN 201210224021 A CN201210224021 A CN 201210224021A CN 102722168 A CN102722168 A CN 102722168A
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- serial ports
- ethernet
- field apparatus
- main frame
- hub
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- 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 invention provides a method for controlling field equipment and a control system. An RS485 serial port is connected with a host machine through an Ethernet, so that physical wires between the host machine and an RS485 wire collector in the prior are omitted; therefore, the host machine can directly acquire a transmission signal sent by the serial port through the Ethernet and issue an instruction to control field equipment; the problem of limited transmission distance between the host machine and the field equipment is solved; furthermore, by using the method, a plurality of host machines can receive transmission signals of the RS485 serial ports at the same time; any host machine can issue the instruction to the field equipment corresponding to any RS485 serial port; due to the networked design of an RS485 bus, data transmission is relatively stable; and an operator can conveniently control all sets of field equipment through any host machine.
Description
Technical field
The present invention relates to the control and the management of field apparatus, relate in particular to a kind of method and control system thereof of controlling field apparatus.
Background technology
Intelligence instrument is along with the maturation of singlechip technology at the beginning of the eighties grows up; The world is monopolized by intelligence instrument in instrument market basically now; Tracing it to its cause is exactly the needs of IT application in enterprises, and enterprise's one of them necessary condition when instrument selection will have the connected network communication interface exactly.Be data analog signal output simple procedure amount at first, instrumentation tap used the RS232 interface afterwards, and this interface can be realized point-to-point communication mode, but this mode can not realize network savvy.The RS232 serial ports that traditional field apparatus control and collecting method directly use; The one of which end is connected with main frame; Its other end is connected with field apparatus, realizes the control to field apparatus through main frame, and the mode of this control and data acquisition is because the RS232 communication distance is too small; Make the range of control of field apparatus be restricted, need main frame to be arranged on and to realize control action near the field apparatus.
Along with the development of field bus technique, the appearance of RS232-RS485 converter has solved the too small problem of communication distance.Fig. 1 is a kind of control system that is used to control field apparatus of the prior art, and is as shown in Figure 1, through being connected of RS232 serial ports 9 and RS232-RS485 converter 10; The simple duplex communication mode that makes communication mode use from the RS232 serial ports has converted the half-duplex operation mode of RS485 to; Improved the efficient of field apparatus 4 controls and data acquisition, in addition, the communication distance of RS485 serial ports 3 is 1200 meters to the maximum; Greatly enlarged the communication range of main frame and field apparatus 4; But RS485 serial ports 3 still needs physical cord to be connected to main frame 1, could realize the control action of main frame 1, has still received the restriction of main frame 1 physical port quantity and data transmission distance; And the data of transmission are interfered easily, and dirigibility is not enough.
Summary of the invention
The purpose of this invention is to provide a kind of method and control system thereof of controlling field apparatus, solve the too small and transmission data problem of unstable of transmission range between main frame and the field apparatus with networking through the RS485 bus.
For solving the problems of the technologies described above; The present invention provides a kind of method of controlling field apparatus; Its each RS485 serial ports that main frame is passed through in the RS485 hub is connected with each field apparatus, thereby reaches the purpose of control field apparatus, and the method for said control field apparatus also comprises:
Step 1: main frame is connected through Ethernet with each RS485 serial ports in the RS485 hub;
Step 2: each RS485 serial ports is connected with corresponding field apparatus;
Step 3: main control system receives the signal in place that each RS485 serial ports sends through Ethernet;
Step 4: main frame sends each field apparatus of signal controlling through Ethernet.
Further, said each RS485 serial ports is connected with the Ethernet serial ports through the RS485-TCP change-over circuit, and said RS485-TCP change-over circuit is used for the communication pattern of RS485 is converted into the communication pattern of TCP/IP; After TCP/IP connected, communicating pair all simultaneously can carry out the transmission of data, secondly; It is a full duplex; Guaranteeing on the reliability that adopt overtime re-transmission and piggybacking mechanism, said Ethernet serial ports is used for the signal after the conversion is connected to Ethernet.
Further, the quantity of said main frame is a plurality of, and said a plurality of main frames all are connected with each RS485 serial ports through Ethernet, and said a plurality of main frames all can receive the signal that all RS485 serial ports send in the RS485 hub through Ethernet.
Further, the method for said control field apparatus adopts each the RS485 serial ports in the said RS485 hub of anti-thunderbolt technical protection.
Further, the method for said control field apparatus adopts antistatic technology to protect each the RS485 serial ports in the said RS485 hub.
Further, the method for said control field apparatus adopts electromangnetic spectrum to protect each RS485 serial ports in the said RS485 hub in order to avoid it receives electromagnetic interference (EMI).
Above-mentioned anti-thunderbolt technology, antistatic technology and electromangnetic spectrum all find broad application in anti-electromagnetic interference (EMI) field, just repeat no more at this.
The present invention also provides a kind of control system of using the method for above-mentioned control field apparatus; Said control system comprises main frame and RS485 hub; Said RS485 hub comprises at least one RS485 serial ports; Said at least one RS485 serial ports is connected through Ethernet with said main frame, and said at least one RS485 serial ports connects with corresponding field apparatus.
Further; Said control system also comprises RS485-TCP change-over circuit and Ethernet serial ports; Said at least one RS485 serial ports is connected with said Ethernet serial ports through said RS485-TCP change-over circuit, and said Ethernet serial ports can be connected to Ethernet with the signal after the conversion.
Further, the quantity of said main frame is a plurality of, and said a plurality of main frames all are connected with said each RS485 serial ports through said Ethernet.
Further, said control system also comprises electromagnetic screen, and said electromagnetic screen is arranged at respectively on said at least one RS485 serial ports.
Compared with prior art, the present invention has following beneficial effect:
The method of control field apparatus provided by the invention and control system thereof are connected with main frame the RS485 serial ports through Ethernet; Saved in the prior art required physical cord between the main frame and RS485 hub; Make main frame directly to obtain the transmission signals that serial ports sends through Ethernet; And issue instruction control field apparatus; Solved transmission range restricted problem between main frame and the field apparatus, and used this method can make multiple host receive the transmission signals of each RS485 serial ports simultaneously, and passed through any main frame to the corresponding field apparatus issuing command of arbitrary RS485 serial ports; The networking design of this RS485 bus not only can make the transmission more stable of data, can also make operating personnel control all field apparatuss through any main frame more easily.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is a kind of control system that is used to control field apparatus of the prior art;
The method flow diagram of the control field apparatus that Fig. 2 provides for the embodiment of the invention;
The control system that is used to control field apparatus that Fig. 3 provides for the embodiment of the invention.
In Fig. 1 to Fig. 3,
1: main frame; The 2:RS485 hub; The 3:RS485 serial ports; 4: field apparatus; 5: Ethernet; The 6:RS485-TCP change-over circuit; 7: the Ethernet serial ports; 8: electromagnetic screen; The 9:RS232 serial ports; The 10:RS232-RS485 converter.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the method and the control system thereof of the control field apparatus of the present invention's proposition are done further explain.According to following explanation and claims, advantage of the present invention and characteristic will be clearer.What need explanation is, accompanying drawing all adopts the form of simplifying very much and all uses non-ratio accurately, only in order to convenient, the purpose of the aid illustration embodiment of the invention lucidly.
Core concept of the present invention is; A kind of method and control system thereof of controlling field apparatus is provided; It is connected with main frame the RS485 serial ports through Ethernet, saved in the prior art required physical cord between the main frame and RS485 hub, makes main frame directly to obtain the transmission signals that serial ports sends through Ethernet; And issue instruction control field apparatus; Solved transmission range restricted problem between main frame and the field apparatus, and used this method can make multiple host receive the transmission signals of each RS485 serial ports simultaneously, and passed through any main frame to the corresponding field apparatus issuing command of arbitrary RS485 serial ports; The networking design of this RS485 bus not only can make the transmission more stable of data, can also make operating personnel control all field apparatuss through any main frame more easily.
Please refer to Fig. 2 and Fig. 3, the method flow diagram of the control field apparatus that Fig. 2 provides for the embodiment of the invention; The control system that is used to control field apparatus that Fig. 3 provides for the embodiment of the invention.
Please emphasis with reference to figure 2; As shown in Figure 2; The embodiment of the invention provides a kind of method of controlling field apparatus; It makes main frame 1 be connected with each field apparatus 4 through each the RS485 serial ports 3 in the RS485 hub 2, thereby reaches the purpose of control field apparatus 4, and the method for said control field apparatus 4 also comprises:
Step 1: main frame 1 is connected through Ethernet 5 with each RS485 serial ports 3 in the RS485 hub 2;
Step 2: each RS485 serial ports 3 is connected with corresponding field apparatus 4;
Step 3: main control system 1 receives the signal in place that each RS485 serial ports 3 sends through Ethernet 5;
Step 4: main frame 1 sends each field apparatus 4 of signal controlling through Ethernet 5.
Further; Said each RS485 serial ports 3 is connected with Ethernet serial ports 7 through RS485-TCP change-over circuit 6; Said RS485-TCP change-over circuit 6 is used for the communication pattern of RS485 serial ports 3 is converted into the communication pattern of TCP/IP; The physical circuit of said RS485-TCP change-over circuit 6 is existing known technology, just repeats no more at this, and said Ethernet serial ports 7 is used for the signal after the conversion is connected to Ethernet 5.
Further, the quantity of said main frame 1 is a plurality of, and said a plurality of main frames 1 all are connected with each RS485 serial ports 3 through Ethernet 5, and said a plurality of main frames 1 all can receive the signal that all RS485 serial ports 3 send in the RS485 hub 2 through Ethernet 5.
The method of the control field apparatus that the embodiment of the invention provides is connected with main frame 1 RS485 serial ports 3 through Ethernet 5; Saved in the prior art required physical cord between the main frame 1 and RS485 hub 2; Make main frame 1 directly to obtain the transmission signals that serial ports sends through Ethernet 5; And issue instruction control field apparatus 4; Solved transmission range restricted problem between main frame 1 and the field apparatus 4, and used this method can make multiple host 1 receive the transmission signals of each RS485 serial ports 3 simultaneously, and passed through field apparatus 4 issuing commands of any main frame 1 to arbitrary RS485 serial ports 3 correspondences; The networking design of this RS485 bus not only can make the transmission more stable of data, can also make operating personnel control all field apparatuss 4 that are connected with main frame 1 through any main frame 1 more easily.
Further, the method for said control field apparatus adopts electromangnetic spectrum to protect each RS485 serial ports 3 in the said RS485 hub 2 in order to avoid it receives electromagnetic interference (EMI), has prevented the electromagnetic interference (EMI) influence that transmission is produced to signal.
Please emphasis with reference to figure 3; As shown in Figure 3; The embodiment of the invention also provides a kind of control system of using the method for above-mentioned control field apparatus, and said control system comprises main frame 1 and RS485 hub 2, and said RS485 hub 2 comprises at least one RS485 serial ports 3; Said at least one RS485 serial ports 3 is connected through Ethernet 5 with said main frame 1, and said at least one RS485 serial ports 3 connects with corresponding field apparatus 4.
Further; Said control system also comprises RS485-TCP change-over circuit 6 and Ethernet serial ports 7; Said at least one RS485 serial ports 3 is connected with said Ethernet serial ports 7 through said RS485-TCP change-over circuit 6; Said RS485-TCP change-over circuit 6 is used for the communication pattern of RS485 serial ports 3 is converted into the communication pattern of TCP/IP, and said Ethernet serial ports 7 is used for the signal after the conversion is connected to Ethernet 5.
Further; The quantity of said main frame 1 is a plurality of; Said a plurality of main frame 1 all is connected with said each RS485 serial ports 3 through said Ethernet 5; This design makes operating personnel make operating personnel control all field apparatuss 4 that are connected with main frame 1 through multiple host 1 more easily through field apparatus 4 issuing commands of any main frame 1 to arbitrary RS485 serial ports 3 correspondences.
Further, said control system also comprises electromagnetic screen 8, and said electromagnetic screen 8 is arranged at respectively on all RS485 serial ports 3, and said electromagnetic screen 8 is used to prevent the electromagnetic interference (EMI) influence that transmission is produced to signal.
Obviously, those skilled in the art can carry out various changes and distortion to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. method of controlling field apparatus, its each RS485 serial ports that main frame is passed through in the RS485 hub is connected with each field apparatus, thereby reaches the purpose of control field apparatus, it is characterized in that, comprising:
Step 1: main frame is connected through Ethernet with each RS485 serial ports in the RS485 hub;
Step 2: each RS485 serial ports is connected with corresponding field apparatus;
Step 3: main control system receives the signal in place that each RS485 serial ports sends through Ethernet;
Step 4: main frame sends each field apparatus of signal controlling through Ethernet.
2. according to the method for the said control field apparatus of claim 1; It is characterized in that; Said each RS485 serial ports is connected with the Ethernet serial ports through the RS485-TCP change-over circuit; Said RS485-TCP change-over circuit is used for the communication pattern of RS485 is converted into the communication pattern of TCP/IP, and said Ethernet serial ports is used for the signal after the conversion is connected to Ethernet.
3. according to the method for the said control field apparatus of claim 2; It is characterized in that; The quantity of said main frame is a plurality of; Said a plurality of main frame all is connected with each RS485 serial ports through Ethernet, and said a plurality of main frames all can receive the signal that all RS485 serial ports send in the RS485 hub through Ethernet.
4. according to the method for each said control field apparatus of claim 1 to 3, it is characterized in that, adopt each the RS485 serial ports in the said RS485 hub of anti-thunderbolt technical protection.
5. according to the method for each said control field apparatus of claim 1 to 3, it is characterized in that, adopt antistatic technology to protect each the RS485 serial ports in the said RS485 hub.
6. according to the method for each said control field apparatus of claim 5, it is characterized in that, adopt electromangnetic spectrum to protect each RS485 serial ports in the said RS485 hub in order to avoid it receives electromagnetic interference (EMI).
7. the control system of the method for the field apparatus of control described in use such as the claim 1; It is characterized in that; Comprise main frame and RS485 hub; Said RS485 hub comprises at least one RS485 serial ports, and said at least one RS485 serial ports is connected through Ethernet with said main frame, and said at least one RS485 serial ports connects with corresponding field apparatus.
8. according to the said control system of claim 7, it is characterized in that the quantity of said main frame is a plurality of, said a plurality of main frames all are connected with said each RS485 serial ports through said Ethernet.
9. according to the said control system of claim 7; It is characterized in that; Also comprise RS485-TCP change-over circuit and Ethernet serial ports; Said at least one RS485 serial ports is connected with said Ethernet serial ports through said RS485-TCP change-over circuit, and said Ethernet serial ports can be connected to Ethernet with the signal after the conversion.
10. according to each said control system of claim 7 to 9, it is characterized in that, also comprise electromagnetic screen, said electromagnetic screen is arranged at respectively on said at least one RS485 serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102240212A CN102722168A (en) | 2012-06-29 | 2012-06-29 | Method for controlling field equipment and control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102240212A CN102722168A (en) | 2012-06-29 | 2012-06-29 | Method for controlling field equipment and control system |
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| CN102722168A true CN102722168A (en) | 2012-10-10 |
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| CN2012102240212A Pending CN102722168A (en) | 2012-06-29 | 2012-06-29 | Method for controlling field equipment and control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796472A (en) * | 2015-04-20 | 2015-07-22 | 太原空港停车场管理有限公司 | Remote parking lot barrier control and monitoring method |
| CN109753038A (en) * | 2018-12-29 | 2019-05-14 | 深圳市越疆科技有限公司 | A kind of industrial flow-line control method |
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Patent Citations (6)
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| CN2705957Y (en) * | 2004-06-07 | 2005-06-22 | 上海电器科学研究所（集团）有限公司 | On-site bus communication protocol switching interface module |
| US20080126665A1 (en) * | 2006-09-19 | 2008-05-29 | Kent Allan Burr | Apparatus and methods to communicatively couple field devices to controllers in a process control system |
| CN101414177A (en) * | 2008-10-17 | 2009-04-22 | 上海纳杰电气成套有限公司 | System for converting serial port to Ethernet based on field bus data acquisition |
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Application publication date: 20121010 |