CN201307236Y - Multi-channel serial communication converter and distributed control system employing same - Google Patents
Multi-channel serial communication converter and distributed control system employing same Download PDFInfo
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- CN201307236Y CN201307236Y CNU2008201528626U CN200820152862U CN201307236Y CN 201307236 Y CN201307236 Y CN 201307236Y CN U2008201528626 U CNU2008201528626 U CN U2008201528626U CN 200820152862 U CN200820152862 U CN 200820152862U CN 201307236 Y CN201307236 Y CN 201307236Y
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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
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Abstract
The utility model relates to a multi-channel serial communication converter. The required data and state are extracted from the information uploaded through various devices provided with different serial communication interfaces, serial communication protocols and serial communication parameters and performs data transmission with an upper computer through a normally-used standard serial communication protocol uniformly after being processed and arranged; therefore, the multi-channel serial communication converter comprises a plurality of first communication interfaces compatible with a lower computer, a second communication interface compatible with the upper computer, a plurality of auxiliary microcontrollers and a main microcontroller, wherein, the auxiliary microcontrollers perform data communication with the lower computer through the first communication interface by utilizing a first serial communication protocol compatible with the serial communication protocol corresponding to the lower computer, the main microcontroller performs data communication with the upper computer through the second communication interface by using a second serial communication protocol compatible with the standard serial communication protocol of the upper computer, and the main microcontroller performs data transmission with all the auxiliary microcontrollers via an internal data bus.
Description
Technical field
The utility model relates to the data transmission device in the industrial automation control system, relates in particular to the Distributed Control System (DCS) of a kind of multi-path serial communication converter and application thereof.
Background technology
Along with development of computer, the Distributed Control System (DCS) based on Industrial PC Computer in the industrial automation field has obtained to use widely.With reference to shown in Figure 1, Distributed Control System (DCS) is the secondary host-guest architecture from system architecture substantially, and promptly host computer 10 adopts Industrial PC Computer, the various configuration softwares of operation under operating system (as the Windows98/2000/XP) environment of PC.Slave computer 30 is various commercial measurements, opertaing device (as instrument, module, Programmable Logic Controller, frequency converter etc.), and these equipment have all disposed various serial communication interfaces (as RS232, RS485, RS422), and have serial communication protocol separately respectively.Link to each other with serial communication bus 20 between host computer 10 and the slave computer 30, according to the difference of serial communication interface and the difference of serial communication protocol, slave computer equipment 30 will be divided on certain serial communication interface that polycomponent is not connected to host computer 10, and host computer 10 just may need to expand a plurality of serial communication interfaces like this.Also may occur that, the serial communication protocol that is certain equipment is not in the scope that the host computer configuration software is supported (off-gauge serial communication protocol), the analog signal interface that will utilize its serial communication protocol to obtain other equipment of configuration software support is gathered the simulating signal of the said equipment analog signal interface output like this, transfers to host computer again after being converted to digital signal.So just may bring new problem, as producing transformed error, being subject to disturb, increasing cost (because of increasing the simulating signal input/output interface) etc.
With Fig. 1 is example, and device A, B, C, D, E are meant the equipment with different serial communication protocols, distinguish with different letters respectively.Among the figure equipment D1, D2 serial communication protocol not in the scope that the host computer configuration software is supported, so will utilize the analog signal interface of equipment E1 to come the simulating signal of collecting device D1, D2 output, transfer to host computer after being converted to digital signal again.The Industrial PC Computer of this system needs to extend to four serial line interfaces, four communication buss first, second needs four kinds of serial communication protocols of configuration in the configuration software, brings the cost in the configuration to increase and structure complicated thus.
The utility model content
Technical problem to be solved in the utility model provides a kind of multi-path serial communication converter, in order between the upper and lower machine of industrial automation control system, to serve as a data buffering conversion equipment, from the various information of uploading with different serial communication interfaces, serial communication protocol, serial communication parameter equipment, extract required data, state etc., carry out data transmission with standard serial communication protocol and host computer commonly used through processing, the unification of arrangement back.
The utility model is that to solve the problems of the technologies described above the technical scheme that adopts be to propose a kind of multi-path serial communication converter, in order between the host computer of Distributed Control System (DCS) and a plurality of slave computer, to carry out protocol conversion, wherein each slave computer has serial communication interface and at least one serial communication protocol, host computer has serial communication interface, the configuration software that moves on the host computer has at least one serial communication protocol, and this multi-path serial communication converter comprises:
A plurality of first communication interfaces connect a plurality of slave computers correspondingly, wherein the serial communication interface compatibility of each first communication interface and the slave computer that is attached thereto;
The second communication interface connects described host computer, the serial communication interface compatibility of described second communication interface and host computer;
A plurality of from microcontroller, connect each first communication interface correspondingly, wherein respectively carry out data communication with first serial communication protocol and the slave computer of the serial communication protocol compatibility of corresponding slave computer from the microcontroller use; And
Host microcontroller, connect described second communication interface, and second serial communication protocol of the serial communication protocol compatibility in use and the host computer configuration software and host computer carry out data communication, wherein said host microcontroller via an internal data bus with respectively from microcontroller transmission data.
In the above-mentioned multi-path serial communication converter, be to work out respectively according to the serial communication protocol of the slave computer of correspondence from first serial communication protocol of microcontroller.
In the above-mentioned multi-path serial communication converter, host microcontroller is via Internal Control Bus IBC control and respectively from the data transfer direction between the microcontroller.
In the above-mentioned multi-path serial communication converter, internal data bus is a parallel bus.
In the above-mentioned multi-path serial communication converter, respectively have different address numbers from microcontroller, described host microcontroller according to address number with respectively from microcontroller transmission data and preserve described data.
In the above-mentioned multi-path serial communication converter, a plurality of first communication interfaces can be respectively one of RS232, RS485, RS422 serial communication interface, and the second communication interface can be one of RS232, RS485, RS422 serial communication interface.
On the other hand, the utility model proposes a kind of Distributed Control System (DCS), comprise a host computer, a plurality of slave computer and at least one multi-path serial communication converter, at least one multi-path serial communication converter is connected between described host computer and a plurality of slave computer, in order to carry out protocol conversion, wherein each slave computer has serial communication interface and at least one serial communication protocol, this host computer has serial communication interface, the configuration software that moves on the host computer has at least one serial communication protocol, and each multi-path serial communication converter comprises:
A plurality of first communication interfaces connect a plurality of slave computers correspondingly, wherein the serial communication interface compatibility of each first communication interface and the slave computer that is attached thereto;
The second communication interface connects described host computer, the serial communication interface compatibility of described second communication interface and host computer;
A plurality of from microcontroller, connect each first communication interface correspondingly, wherein respectively carry out data communication with first serial communication protocol and the slave computer of the serial communication protocol compatibility of corresponding slave computer from the microcontroller use; And
Host microcontroller, connect described second communication interface, and second serial communication protocol of the serial communication protocol compatibility in use and the host computer configuration software and host computer carry out data communication, wherein said host microcontroller via an internal data bus with respectively from microcontroller transmission data.
The utility model is owing to adopted multi-path serial communication converter, the data that each slave computer can be come via the transmission of different communication interface and communication protocol, state etc., through processing, arrangement back unified with the host computer configuration software in second serial communication protocol of serial communication protocol compatibility be transferred to host computer.So just the hardware structure of simplified system and software arrangements greatly also can be gone the equipment integration with non-standard serial communication protocol to system.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is existing a kind of Distributed Control System (DCS) configuration diagram.
Fig. 2 is according to a kind of Distributed Control System (DCS) configuration diagram that adopts multi-path serial communication converter of the present utility model.
Fig. 3 is the multi-path serial communication converter Organization Chart according to the utility model one embodiment.
Fig. 4 A is the host microcontroller program flow diagram of multi-path serial communication converter.
Fig. 4 B be multi-path serial communication converter from the microcontroller program flow diagram.
Fig. 5 is according to a kind of inorganic waste water reclamation movement expert system synoptic diagram that adopts multi-path serial communication converter of the present utility model.
Embodiment
The utility model proposes a kind of multi-path serial communication converter for the problem that the solution industrial automation control system need dispose a plurality of serial communication interfaces and multiple serial communication protocol, in order to serve as a data buffering conversion equipment between the upper and lower machine of industrial automation control system, the conversion that serial communication converter carried out can comprise serial communication interface conversion and/or serial communication protocol conversion.
Fig. 2 illustrates according to a kind of Distributed Control System (DCS) configuration diagram that adopts multi-path serial communication converter of the present utility model.Fig. 3 illustrates the multi-path serial communication converter Organization Chart according to the utility model one embodiment.With reference to Fig. 2, shown in Figure 3, a kind of Distributed Control System (DCS) 100 comprises a host computer 110, a plurality of slave computer 130 and a plurality of multi-path serial communication converter 120.Host computer 110 for example adopts Industrial PC Computer, the various configuration softwares of operation under operating system (as the Windows 98/2000/XP) environment of PC.Slave computer 130 can be various commercial measurements, opertaing device, includes but not limited to instrument, module, Programmable Logic Controller, frequency converter etc.These equipment have all disposed various serial communication interfaces, as RS232, RS485, RS422, and have separately serial communication protocol respectively.
The one or more serial communication interfaces of host computer 110 configurations, the configuration software that moves on the host computer has one or more serial communication protocols.In embodiment illustrated in fig. 2, host computer 110 can only dispose a serial communication interface, and the configuration software of its operation only has a kind of serial communication protocol, and referred to herein as standard serial communication protocol, it can be the Modbus rtu protocol of using always.
A plurality of multi-path serial communication converters 120 are connected between host computer 110 and a plurality of slave computer 130, and each converter 120 can connect a plurality of slave computers.Converter can carry out the interface conversion of slave computer and host computer signal post need, for example is the RS485 interface that host computer is supported with the RS232 interface conversion.The more important thing is, converter can also carry out the protocol conversion of slave computer and host computer signal post need, and for example the Data Format Transform with other serial communication protocols (being generally the unsupported serial communication protocol of host computer configuration software) transmission is the data layout of the Modbus agreement of host computer configuration software support.As required, multi-path serial communication converter 120 can only carry out the conversion of interface, perhaps only carries out the conversion of agreement.
As shown in Figure 2, four kinds of equipment that are numbered A, B, C, D, E have different serial communication protocols respectively.Wherein, device A for example has the compatible serial communication protocol of serial communication protocol that is had with the host computer configuration software, that is to say the serial communication protocol of configuration software support equipment A.Distributed Control System (DCS) 100 adopts three multi-path serial communication converters 120, after three groups of slave computer equipment that are numbered B, C, D carry out interface and/or protocol conversion via three multi-path serial communication converters 120 respectively, use the serial communication protocol of the serial communication protocol compatibility that is had with configuration software to communicate by letter with host computer 110.Because a plurality of equipment of same serial communication protocol can a shared serial line interface (just having different addresses), therefore as shown in Figure 2, the Industrial PC Computer of Distributed Control System (DCS) of the present utility model only needs a serial line interface, only needs a kind of standard serial communication protocol of configuration in the configuration software.
With reference to shown in Figure 3, multi-path serial communication converter 120 adopts N road input/one road export structure, and promptly N road serial information inputs to converter 120, and one road serial information exports host computer 110 to.The N road serial information of input can adopt different serial communication protocols, the general standard serial communication protocol of using always that adopts of one road serial information of output.
Specifically, first communication interface 121, a plurality of that each multi-path serial communication converter comprises is a plurality of (as N, N is〉1 positive integer), and host microcontroller 124, second communication interface 125 from microcontroller 122, bus driver 123; Internal data bus 126 and Internal Control Bus IBC 127.First communication interface 121 connects a plurality of slave computers 130 (with reference to Fig. 2) correspondingly, and wherein each first communication interface 121 is compatible with the communication interface of the slave computer 130 that is attached thereto.Wherein, first communication interface 121 can select to adopt different serial communication interfaces, for example RS232, RS485, RS422.The parameter (as word length, baud rate, position of rest, check bit etc.) of each first communication interface 121 is provided with can be incomplete same.
Multi-path serial communication converter 120 adopts the framework of " host microcontroller+N from microcontroller ".Wherein N is individual connects each first communication interface 121 correspondingly from microcontroller 122, respectively from first serial communication protocol of microcontroller 122 interior configurations, to carry out data communication with slave computer 130 via each first communication interface 121 with the serial communication protocol compatibility of slave computer 130.In an example, because the diversity of the serial communication protocol of slave computer 130, can then, select or work out a kind of serial communication protocol of compatibility according to the slave computer 130 that will connect at the program's memory space that in microcontroller 122, remains for the serial communication protocol programming in advance.
Link to each other with internal data bus 126 by bus driver 123 between the master and slave microcontroller 124,122, host microcontroller 124 is via internal data bus 126 and respectively from microcontroller 122 transmission data.In addition, host microcontroller 124 is by the flow direction of the above-mentioned transmission data of Internal Control Bus IBC 127 controls.
In addition, host microcontroller 124 also has second serial communication protocol of the standard serial communication protocol compatibility that is had with the host computer configuration software, so that carry out data communication by second communication interface 125 and host computer.For instance, second serial communication protocol is selected the Modbus agreement for use.
The host microcontroller 124 of multi-path serial communication converter 120 is responsible for and respectively from the control of 122 data transmission of microcontroller, and the arrangement of all data, the process uploaded.Respectively be responsible for the reception of input serial data information (by each equipment output), the process of data extract from microcontroller 122.Their course of work is described below.
Data transmission between master and slave microcontroller is undertaken by the mode of prior agreement.In one embodiment, the program circuit of host microcontroller is shown in Fig. 4 A, after the startup, whether need obtain data (step 201), if host computer need not obtain data, then wait for the sampling period whether arrive (step 202) if detecting host computer, after sampling period arrives,,, upgrade from microcontroller address number and arrangement then and preserve data (step 205) from microcontroller address number and protocol transmission data (step 203) according to current up to end of transmission (EOT) (step 204).On the other hand, if host computer need obtain data, then extract data and by transmitting data (step 206) between standard serial communication protocol and host computer, up to end of transmission (EOT) (step 207).
Correspondingly, from the program circuit of microcontroller referring to shown in Fig. 4 B, after the startup, whether need obtain data (step 301), if main microcontroller need not obtained data, then wait for the sampling period whether arrive (step 302) if detecting host microcontroller, after sampling period arrives, according to the communication protocol transmission data (step 303) of equipment,, put and preserve data (step 305) then in order up to end of transmission (EOT) (step 304).On the other hand, if main microcontroller need be obtained data, then current data is transmitted (step 306) in order, up to end of transmission (EOT) (step 307).
Fig. 5 illustrates a kind of inorganic waste water reclamation movement expert system synoptic diagram that adopts multi-path serial communication converter.In " inorganic waste water reclamation movement expert system " Distributed Control System (DCS) 400, used and the essentially identical framework of Distributed Control System (DCS) as shown in Figure 2, therefore launch no longer in detail at this.Only described with regard to the difference of present embodiment.What in the present embodiment, host computer 410 used is the refreshed MCGS configuration software in the Kunlun.Three Programmable Logic Controllers (PLC) are the RS485 serial line interface, use Modbus RTU serial communication protocol; All PH as slave computer 430 (potential of hydrogen), ORP (oxidation-reduction potential), EC (conductivity) instrument are the RS232 serial line interface, but the MCGS configuration software is not all supported its serial communication protocol.By three multi-path serial communication converters 420, can collect the measurement data of all instrument, and its order by agreement is carried out layout, be uploaded to host computer 410 with Modbus RTU serial communication protocol by the RS485 serial line interface.More than these use the equipment (three PLC, three converters) of Modbus RTU serial communication protocols and RS485 serial line interface, taken a serial line interface of host computer.In addition, two adjustment controls have taken another serial line interface of host computer, use be the AI instrument serial communication protocol that the MCGS configuration software is supported.
In these routine multi-path serial communication converter 120 structures, host microcontroller has adopted the AT89C52 single-chip microcomputer; Respectively adopted the AT89C2051 single-chip microcomputer from microcontroller; Serial line interface is MAX232 and MAX485; Bus driver is 74HC245.
Therefore in above-mentioned " inorganic waste water reclamation movement expert system " application example,, carry out collection, the conversion of the serial information of multi-channel intelligent instrument, finished the transmission of PH, ORP, EC data by using three multi-path serial communication converters.And host computer only need use a spot of serial line interface and serial communication protocol, and can communicate with incompatible equipment.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (8)
1. multi-path serial communication converter, in order between the host computer of Distributed Control System (DCS) and a plurality of slave computer, to carry out protocol conversion, wherein each slave computer has serial communication interface and at least one serial communication protocol, described host computer has serial communication interface and at least one standard serial communication protocol, it is characterized in that described multi-path serial communication converter comprises:
A plurality of first communication interfaces connect a plurality of slave computers correspondingly, wherein the serial communication interface compatibility of each first communication interface and the slave computer that is attached thereto;
The second communication interface connects described host computer, the serial communication interface compatibility of described second communication interface and host computer;
A plurality of from microcontroller, connect each first communication interface correspondingly, wherein respectively carry out data communication with first serial communication protocol and the slave computer of the serial communication protocol compatibility of corresponding slave computer from the microcontroller use; And
Host microcontroller, connect described second communication interface, and second serial communication protocol and the host computer of the standard serial communication protocol compatibility of use and host computer carry out data communication, wherein said host microcontroller via an internal data bus with respectively from microcontroller transmission data.
2. multi-path serial communication converter as claimed in claim 1 is characterized in that, also comprises an Internal Control Bus IBC, and described host microcontroller is via this Internal Control Bus IBC control and respectively from the data transfer direction between the microcontroller.
3. multi-path serial communication converter as claimed in claim 1 is characterized in that, described internal data bus is a parallel bus.
4. multi-path serial communication converter as claimed in claim 1, it is characterized in that, described a plurality of first communication interface is respectively one of RS232, RS485, RS422 serial communication interface, and described second communication interface is one of RS232, RS485, RS422 serial communication interface.
5. Distributed Control System (DCS), comprise a host computer, a plurality of slave computer and at least one multi-path serial communication converter, described at least one multi-path serial communication converter is connected between described host computer and a plurality of slave computer, in order to carry out protocol conversion, wherein each slave computer has serial communication interface and at least one serial communication protocol, described host computer has serial communication interface and at least one standard serial communication protocol, it is characterized in that each multi-path serial communication converter comprises:
A plurality of first communication interfaces connect a plurality of slave computers correspondingly, wherein the serial communication interface compatibility of each first communication interface and the slave computer that is attached thereto;
The second communication interface connects described host computer, the serial communication interface compatibility of described second communication interface and host computer;
A plurality of from microcontroller, connect each first communication interface correspondingly, wherein respectively carry out data communication with first serial communication protocol and the slave computer of the serial communication protocol compatibility of corresponding slave computer from the microcontroller use; And
Host microcontroller, connect described second communication interface, and second serial communication protocol and the host computer of the standard serial communication protocol compatibility of use and host computer carry out data communication, wherein said host microcontroller via an internal data bus with respectively from microcontroller transmission data.
6. Distributed Control System (DCS) as claimed in claim 5, it is characterized in that, described a plurality of first communication interface is respectively one of RS232, RS485, RS422 serial communication interface, and described second communication interface is one of RS232, RS485, RS422 serial communication interface.
7. Distributed Control System (DCS) as claimed in claim 5 is characterized in that described multi-path serial communication converter also comprises an Internal Control Bus IBC, and described host microcontroller is via this Internal Control Bus IBC control and respectively from the data transfer direction between the microcontroller.
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| CNU2008201528626U CN201307236Y (en) | 2008-09-09 | 2008-09-09 | Multi-channel serial communication converter and distributed control system employing same |
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| CNU2008201528626U CN201307236Y (en) | 2008-09-09 | 2008-09-09 | Multi-channel serial communication converter and distributed control system employing same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053580A (en) * | 2009-11-10 | 2011-05-11 | 江苏云联科技有限公司 | Method for controlling electronic device and design construction system |
| CN102253666A (en) * | 2011-01-10 | 2011-11-23 | 哈尔滨工程大学 | Adjustable pitch propeller CAN (Controller Area Network) bus pitch adjustment controller |
| CN102354175A (en) * | 2011-08-01 | 2012-02-15 | 李遇浦 | Remote I/O (input/output) control system of Modbus fieldbus DI-16-route monitor |
| CN104597817A (en) * | 2015-01-12 | 2015-05-06 | 北京慧物科联科技有限公司 | Parallel acquisition system of multi-channel digital sensor |
| CN110166481A (en) * | 2019-06-03 | 2019-08-23 | 易事特智能化系统集成有限公司 | A kind of power equipment protocol conversion system and method |
| CN112460747A (en) * | 2020-11-19 | 2021-03-09 | 珠海格力电器股份有限公司 | Communication control method and device of split air conditioner, storage medium and lower computer |
| CN114172578A (en) * | 2021-12-08 | 2022-03-11 | 武汉兴思为光电科技有限公司 | DWDM optical module and optical fiber communication system |
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2008
- 2008-09-09 CN CNU2008201528626U patent/CN201307236Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053580A (en) * | 2009-11-10 | 2011-05-11 | 江苏云联科技有限公司 | Method for controlling electronic device and design construction system |
| CN102053580B (en) * | 2009-11-10 | 2015-08-26 | 数伦计算机技术（上海）有限公司 | Control method and the design construction system of electronic equipment |
| CN102253666A (en) * | 2011-01-10 | 2011-11-23 | 哈尔滨工程大学 | Adjustable pitch propeller CAN (Controller Area Network) bus pitch adjustment controller |
| CN102354175A (en) * | 2011-08-01 | 2012-02-15 | 李遇浦 | Remote I/O (input/output) control system of Modbus fieldbus DI-16-route monitor |
| CN102354175B (en) * | 2011-08-01 | 2014-10-15 | 李遇浦 | Remote I/O (input/output) control system of Modbus fieldbus DI-16-route monitor |
| CN104597817A (en) * | 2015-01-12 | 2015-05-06 | 北京慧物科联科技有限公司 | Parallel acquisition system of multi-channel digital sensor |
| CN110166481A (en) * | 2019-06-03 | 2019-08-23 | 易事特智能化系统集成有限公司 | A kind of power equipment protocol conversion system and method |
| CN112460747A (en) * | 2020-11-19 | 2021-03-09 | 珠海格力电器股份有限公司 | Communication control method and device of split air conditioner, storage medium and lower computer |
| CN112460747B (en) * | 2020-11-19 | 2021-11-23 | 珠海格力电器股份有限公司 | Communication control method and device of split air conditioner, storage medium and lower computer |
| CN114172578A (en) * | 2021-12-08 | 2022-03-11 | 武汉兴思为光电科技有限公司 | DWDM optical module and optical fiber communication system |
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