CN105467893A - IO expansion module with PROFIBUS communication - Google Patents
IO expansion module with PROFIBUS communication Download PDFInfo
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- CN105467893A CN105467893A CN201510946225.0A CN201510946225A CN105467893A CN 105467893 A CN105467893 A CN 105467893A CN 201510946225 A CN201510946225 A CN 201510946225A CN 105467893 A CN105467893 A CN 105467893A
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- profibus
- optical coupling
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- coupling isolation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25021—Profibus
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Communication Control (AREA)
Abstract
The invention relates to an IO expansion module with PROFIBUS communication, and the expansion module comprises a processor, a PROFIBUS protocol chip connected with a processor signal, a plurality of control signal output circuits connected with the processor signal, a plurality of feedback signal input circuits connected with the processor signal, and a power supply circuit that supplies power for the processor, the PROFIBUS protocol chip, the control signal output circuits and the feedback signal input circuits. According to the IO expansion module with PROFIBUS communication, the communication rate of the bus of the PROFIBUS protocol chip is guaranteed by using the PROFIBUS protocol chip; the work is stable and reliable by using the processor; data is shared between the processor and the PROFIBUS protocol chip; and, IO expansion is realized by using the control signal output circuits and the feedback signal input circuits; and the on-site apparatus can be controlled conveniently. The IO expansion module with PROFIBUS communication has the advantages of high performance, low cost, and stable and reliable work.
Description
Technical field
The present invention relates to a kind of IO expansion module with PROFIBUS communication, belong to automatic control technology field.
Background technology
PROFIBUS is a kind of internationalization, open, the standard for Fieldbus that do not rely on device fabrication business, be widely used in the fields such as automated manufacturing, process industry robotization and building, traffic, electric power, wherein PROFIBUS is a kind of high speed low cost communication standard, is used for the communication of device level control system distributing I/O.The applicating and exploitation of PROFIBUS bussing technique is relatively more extensive at home at present, although PROFIBUS agreement is open, technology is closed, and core technology is controlled by several offshore companies such as Siemenss.At present, develop PROFIBUS master device and mainly contain following several feasible scheme:
(1) software PROFIBUS main website.The program realizes institute's protocols having of more than PROFIBUS Physical layer by software, runs complete protocol stack in the microprocessor.Because current most of CPU is with UART mouth, only needs an additional RS485 transceiver can realize the Physical layer of DP agreement, realize the data link layer of DP agreement, user interface layer etc. on this basis.Although program hardware is simple, with low cost, but the task of Software for Design is very complicated, reliability is difficult to ensure, and not reaching higher traffic rate, on general processor piece, the theoretical limit speed of UART is at about 1.5Mbps, adds the function of data link layer and user interface layer, actual hump speed is estimated only to reach hundreds of Kbps, differ greatly with the 12Mbps speed of DP agreement support, reduce the performance of communication, limit the application scenario of equipment.
(2) based on embedded master station module secondary development.The program is that exploitation PROFIBUS main website adopts maximum one.Embedded master station module inside is integrated PROFIBUS chip and program curing.Developer buys flush bonding module and does secondary development on its basis.Program development difficulty and development risk all greatly reduce, construction cycle reduces, but existing embedded master station module is monopolized by offshore companies such as Siemenss substantially in the market, adopt this scheme to need to buy their flush bonding module, cost of development greatly and under one's control technically.
(3) the additional expansion firmware program of asic chip.The program realizes the medium access control function of PROFIBUS protocol data link layer by asic chip, and other functions of data link layer and the function of user interface layer are run its expansion firmware program by microprocessor and realized.The hardware plan of the program is more complicated than the first scheme, due to the use of asic chip, the program can reach higher traffic rate (the highest 12Mbps), the speed advantage of PROFIBUS bus can be given full play to, stable and reliable for performance, and eliminate the extra cost using foreign technology, cost of products relative moderate.But at present, foreign chip supplier limits the opening of the supporting firmware program of chip, does not sell firmware, therefore adopt this scheme will write firmware program and upper layer software (applications) by developer's designed, designed hardware interface circuit, development difficulty is very big.
Summary of the invention
The object of this invention is to provide a kind of PROFIBUS master communication equipment that can realize 1 class master function in PROFIBUS protocol stack, and provide multichannel I/O port to control external device (ED) state.
To achieve these goals, the technical solution used in the present invention is as follows: a kind of IO expansion module with PROFIBUS communication, the power circuit comprising processor, the PROFIBUS protocol chip be connected with described processor signal, the some roads control signal output circuit be connected with described processor signal, the some roads feedback signal input circuit be connected with described processor signal and power to described processor, PROFIBUS protocol chip, control signal output circuit and feedback signal input circuit.
Further, described control signal output circuit is 10 tunnels.
Further, control signal output circuit described in every road is serially connected in the first electric capacity and the first resistance, the second resistance be serially connected on the first terminal of described first optical coupling isolation circuit between the first terminal of described first optical coupling isolation circuit and the second terminal, is serially connected in the second electric capacity between the 3rd terminal of described first optical coupling isolation circuit and the 4th terminal and is serially connected in the 3rd resistance on the 4th terminal of described first optical coupling isolation circuit after comprising the first optical coupling isolation circuit, parallel connection.
Further, described feedback signal input circuit is 12 tunnels.
Further, described in every road, feedback signal input circuit comprises the second optical coupling isolation circuit, relay, be serially connected in the 4th resistance on the first terminal of described second optical coupling isolation circuit, be serially connected in the 4th light emitting diode between terminal and the Five-terminals of relay and the 5th resistance of described second optical coupling isolation circuit, the second diode being serially connected in described second optical coupling isolation circuit and the first diode between relay and being connected with described first diode, the negative pole of described first diode respectively with the Five-terminals of relay, the positive pole of the second diode connects, the positive pole of described first diode and the 4th terminal of the second optical coupling isolation circuit, the first terminal of relay connects.
Further, described processor is 32-bit microprocessor.
By such scheme, the present invention at least has the following advantages: the IO expansion module of band PROFIBUS of the present invention communication is the traffic rate by adopting PROFIBUS protocol chip to ensure that the bus of PROFIBUS protocol chip on the one hand, and by adopting processor to make its working stability reliable, and utilize the data sharing of processor and PROFIBUS protocol chip; Realize I/O port expansion by control signal output circuit, feedback signal input circuit on the other hand, the convenient control to field device, the IO expansion module that this band PROFIBUS communicates possesses high-performance, low cost, the reliable feature of working stability.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the system chart of the IO expansion module that band PROFIBUS of the present invention communicates;
Fig. 2 is the circuit theory diagrams of the feedback signal input circuit of Fig. 1;
Fig. 3 is the circuit theory diagrams of the control signal output circuit of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Refer to Fig. 1, the power circuit 50 that a kind of IO expansion module with PROFIBUS communication described in a preferred embodiment of the present invention comprises processor 10, the PROFIBUS protocol chip 20 be connected with described processor 10 signal, the some roads control signal output circuit 30 be connected with described processor 10 signal, the some roads feedback signal input circuit 40 be connected with described processor 10 signal and powers to described processor 10, PROFIBUS protocol chip 20, control signal output circuit 30 and feedback signal input circuit 40.Described control signal output circuit 30 is 10 tunnels, and described feedback signal input circuit 40 is 12 tunnels, and described processor 10 is 32-bit microprocessor 10, and described PROFIBUS protocol chip 20 is VPC3 chip.When the actual use of the IO expansion module that above-mentioned band PROFIBUS communicates; described PROFIBUS protocol chip 20 connects PROFIBUS bus by RS485 interface circuit (not shown); light-coupled isolation protection is provided with between this PROFIBUS protocol chip 20 and RS485 interface circuit; described processor 10 connects peripheral circuit, and peripheral circuit can comprise and connect LED, clock circuit, reset circuit etc. by the I/O of microprocessor 10.
Refer to Fig. 2, control signal output circuit 30 described in every road comprises the first optical coupling isolation circuit and logical transition circuit, its concrete structure is as follows: comprise the first optical coupling isolation circuit 31, the first electric capacity 32 and the first resistance 33 between the first terminal of described first optical coupling isolation circuit 31 and the second terminal is serially connected in after parallel connection, be serially connected in the second resistance 34 on the first terminal of described first optical coupling isolation circuit 31, be serially connected in the second electric capacity 35 between the 3rd terminal of described first optical coupling isolation circuit 31 and the 4th terminal, and the 3rd resistance 36 be serially connected on the 4th terminal of described first optical coupling isolation circuit 31.This control signal output circuit 30 is for receiving running status, the feedback signal of field device equipment, play jamproof effect, in the present embodiment, the first resistance 33 be connected in parallel on the first optical coupling isolation circuit 31 is said current dumping resistance, it mainly gives weak current signal path, the light emitting diode 37 of the first optical coupling isolation circuit 31 is avoided to mislead, an effect is also had to be and the second resistance 34 dividing potential drop that it and the first electric capacity 32 be connected in parallel on the first optical coupling isolation circuit 31 use when response speed is not high simultaneously simultaneously.
Refer to Fig. 3, described in every road, feedback signal input circuit 40 comprises clamping protective circuit and control relay circuit, specifically comprise the second optical coupling isolation circuit 41, relay 42, be serially connected in the 4th resistance 43 on the first terminal of described second optical coupling isolation circuit 41, be serially connected in the light emitting diode 48 between the 4th terminal of described second optical coupling isolation circuit 41 and the Five-terminals of relay 42 and the 5th resistance 44, the second diode 46 being serially connected in described second optical coupling isolation circuit 41 and the first diode 45 between relay 42 and being connected with described first diode 45, the negative pole of described first diode 45 respectively with the Five-terminals of relay 42, the positive pole of the second diode 46 connects, the positive pole of described first diode 45 and the 4th terminal of the second optical coupling isolation circuit 41, the first terminal of relay 42 connects.This feedback signal input circuit 40 is for the control to field device, and prime is by light-coupled isolation, and the second optical coupling isolation circuit 41 pilot relay 42 break-make and then control export.Antiparallel first diode 45 in coil 47 two ends of relay 42 consumes diode, because the coil 47 of relay 42 can produce in a flash a very strong inverse electromotive force in power-off, so have impact to other element, and be used to consume this inverse electromotive force at coil 47 two ends this first diode 45 of reverse parallel connection of relay 42.Light emitting diode 48 is pilot lamp, lights when relay 42 works.
In sum, IO expansion module with PROFIBUS communication is the traffic rate by adopting PROFIBUS protocol chip 20 to ensure that the bus of PROFIBUS protocol chip 20 on the one hand, and by adopting processor 10 to make its working stability reliable, and utilize the data sharing of processor 10 and PROFIBUS protocol chip 20; Realize I/O port expansion by control signal output circuit 30, feedback signal input circuit 40 on the other hand, the convenient control to field device, the IO expansion module that this band PROFIBUS communicates possesses high-performance, low cost, the reliable feature of working stability.
The above is only the preferred embodiment of the present invention; be not limited to the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (6)
1. the IO expansion module with PROFIBUS communication, is characterized in that: the power circuit comprising processor, the PROFIBUS protocol chip be connected with described processor signal, the some roads control signal output circuit be connected with described processor signal, the some roads feedback signal input circuit be connected with described processor signal and power to described processor, PROFIBUS protocol chip, control signal output circuit and feedback signal input circuit.
2. the IO expansion module of band PROFIBUS according to claim 1 communication, is characterized in that: described control signal output circuit is 10 tunnels.
3. the IO expansion module of band PROFIBUS according to claim 1 and 2 communication, it is characterized in that: described in every road, control signal output circuit comprises the first optical coupling isolation circuit, the first electric capacity between the first terminal of described first optical coupling isolation circuit and the second terminal and the first resistance is serially connected in after parallel connection, be serially connected in the second resistance on the first terminal of described first optical coupling isolation circuit, be serially connected in the second electric capacity between the 3rd terminal of described first optical coupling isolation circuit and the 4th terminal, and the 3rd resistance be serially connected on the 4th terminal of described first optical coupling isolation circuit.
4. the IO expansion module of band PROFIBUS according to claim 1 communication, is characterized in that: described feedback signal input circuit is 12 tunnels.
5. the IO expansion module that the band PROFIBUS according to claim 1 or 4 communicates, it is characterized in that: described in every road, feedback signal input circuit comprises the second optical coupling isolation circuit, relay, be serially connected in the 4th resistance on the first terminal of described second optical coupling isolation circuit, be serially connected in the 4th light emitting diode between terminal and the Five-terminals of relay and the 5th resistance of described second optical coupling isolation circuit, the second diode being serially connected in described second optical coupling isolation circuit and the first diode between relay and being connected with described first diode, the negative pole of described first diode respectively with the Five-terminals of relay, the positive pole of the second diode connects, the positive pole of described first diode and the 4th terminal of the second optical coupling isolation circuit, the first terminal of relay connects.
6. the IO expansion module of band PROFIBUS according to claim 1 communication, is characterized in that: described processor is 32-bit microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946225.0A CN105467893A (en) | 2015-12-16 | 2015-12-16 | IO expansion module with PROFIBUS communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946225.0A CN105467893A (en) | 2015-12-16 | 2015-12-16 | IO expansion module with PROFIBUS communication |
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| CN105467893A true CN105467893A (en) | 2016-04-06 |
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| CN201510946225.0A Pending CN105467893A (en) | 2015-12-16 | 2015-12-16 | IO expansion module with PROFIBUS communication |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352313Y (en) * | 2009-01-16 | 2009-11-25 | 北京凯迪恩自动化技术有限公司 | PLC extension module device with multipath digital quantity input/output multiplex channels |
| CN102833142A (en) * | 2012-09-10 | 2012-12-19 | 天津理工大学 | Profibus-DP slave station device on basis of FDGA (Field Programmable Gate Array) |
| CN203732926U (en) * | 2014-03-05 | 2014-07-23 | 广州市井源机电设备有限公司 | Digital input and output expansion module for AGV vehicle-borne control systems |
| CN104410600A (en) * | 2014-08-06 | 2015-03-11 | 内蒙古科技大学 | Control network multi-protocol data converting device |
-
2015
- 2015-12-16 CN CN201510946225.0A patent/CN105467893A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352313Y (en) * | 2009-01-16 | 2009-11-25 | 北京凯迪恩自动化技术有限公司 | PLC extension module device with multipath digital quantity input/output multiplex channels |
| CN102833142A (en) * | 2012-09-10 | 2012-12-19 | 天津理工大学 | Profibus-DP slave station device on basis of FDGA (Field Programmable Gate Array) |
| CN203732926U (en) * | 2014-03-05 | 2014-07-23 | 广州市井源机电设备有限公司 | Digital input and output expansion module for AGV vehicle-borne control systems |
| CN104410600A (en) * | 2014-08-06 | 2015-03-11 | 内蒙古科技大学 | Control network multi-protocol data converting device |
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Application publication date: 20160406 |
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