CN104035382A - Frequency converter monitoring system - Google Patents
Frequency converter monitoring system Download PDFInfo
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- CN104035382A CN104035382A CN201310068433.6A CN201310068433A CN104035382A CN 104035382 A CN104035382 A CN 104035382A CN 201310068433 A CN201310068433 A CN 201310068433A CN 104035382 A CN104035382 A CN 104035382A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 68
- 238000013461 design Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 5
- RUZYUOTYCVRMRZ-UHFFFAOYSA-N doxazosin Chemical compound C1OC2=CC=CC=C2OC1C(=O)N(CC1)CCN1C1=NC(N)=C(C=C(C(OC)=C2)OC)C2=N1 RUZYUOTYCVRMRZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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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]
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Abstract
The invention brings forward a frequency converter monitoring system based on a PLC and configuration software. The frequency converter monitoring system takes a demand for monitoring a frequency converter in an industrial production process as a background, combines both theories and practice and solves the actual problems in production. The frequency converter monitoring system is characterized in that the analysis and design of a system working process is realized in such a way that the states such as operation, stop and the like of the frequency converter can be controlled in a frequency converter operation control picture. In a frequency converter operation state monitoring picture, the output currents, the output voltages and the operation frequency of the frequency converter can be monitored, and communication between an S7-200 PLC and the frequency converter is designed to be such a way that data exchange, i.e., data communication between a CPU and the outside employs a parallel communication mode and a serial communication mode, such that the application of the frequency converter greatly improves the production efficiency and the energy conservation effect of the production process, the operation state of the frequency converter can be remotely monitored in a control chamber, the burden of operators is mitigated to the greatest extent, the work environment is improved, and the automation level of enterprises is improved.
Description
Technical field
The present invention relates to mechanotronics design field, be specially a kind of frequency converter supervisory system.
Background technology
Along with converter technology and industrial development, frequency converter is widely used in every profession and trade as the important means of AC speed regulating.The application of frequency converter has not only improved production efficiency and the energy-saving effect of production run greatly, and can be in pulpit the running status of remote monitoring frequency converter, alleviate to greatest extent operating personnel's burden, improve working environment, improve the automatization level of enterprise.
The development of frequency converter is the product of world production power and rapid economic development.In recent years, ac variable speed technology has had the development of advancing by leaps and bounds in China, and the advantage of frequency control at aspects such as speed adjustable range, adjusting speed accuracy, communication function, saves energy, work efficiencies is that other AC speed-regulating mode is incomparable.The frequency control of frequency converter based on AC motor and development and application; it is little, lightweight with volume, highly versatile, usable range is wide, defencive function is perfect, reliability is high, the advantage such as easy and simple to handle; deeply be subject to the welcome of the industries such as iron and steel, metallurgy, mine, petrochemical industry, medicine, food, weaving, printing and dyeing, machinery, electric power, building materials, papermaking, use after frequency converter all highly significants of economic benefit and social benefit.
PLC technology is a kind ofly to take computer technology as basic infant industry control device.In recent years, PLC technology was widely applied in various industrial process control, automatic control in the production line and all kinds of electromechanical integration equipment are controlled, and became a very important application technology of industrial control field.PLC has been widely used in all trades and professions such as oil, chemical industry, metallurgy, light industry, machinery, electric power at present, has realized the automatic control of logic, stepping, numeral, robot, analog quantity etc.Along with the arrival of digital times, software field will, constantly to hardware infiltration, constantly replace hardware with software, thereby realize Based Intelligent Control and the production automation.PLC is exactly the product that computer technology is permeated to hardware art such as relays, with software, replaces hardware, replaces hardware relay, thereby for connection and the transformation of system provides convenience, can cost-savingly increase work efficiency with software program.
Summary of the invention
The object of the invention is to take in industrial processes need to be background to the monitoring of frequency converter, integrates theory with practice, and proposes a kind of frequency converter supervisory system based on PLC and configuration software, solves the practical problems in producing.
To achieve these goals, the technical solution used in the present invention is specific as follows:
One, system work process analysis design
1, in frequency converter operation control interface, can control frequency converter operation, the state such as stop.When click with " RUN " printed words button time, because this button has been set up annexation with a binary process variable, this binary process variable is corresponding with an input point of S7-200 PLC CPU224 XP, click the input point that this button has just equaled to connect S7-200 PLC CPU224 XP, now in trapezoid figure program, the normally opened contact closed energy stream corresponding with input point flow through the connection of this program segment driving PLC output point, also just equal to supress the operation key on frequency converter primary operation panel, so frequency converter starts operation.In like manner, can press low-converter and move that stop button in control interface, frequency increase button, frequency reduces button and failure reset button is controlled frequency converter.
2,, in frequency converter running state monitoring picture, can monitor output current, output voltage and the running frequency of frequency converter.This tittle also by one, has been endowed the process variable of MODBUS address and corresponding relation has been set up in the address in S7-200 PLC CPU224 XP variable storage district.When normally working, system can with interval sometime, read by control program the data of frequency converter actual motion.These data are first stored in the variable storage district of PLC, then through certain transformational relation, via the serial communication interface of PLC, are delivered in WinCC configuration picture and show.
The described WinCC V5.1 Real-time Database of Configuration Software function of passing through, process values is filed, then with formal output active procedure value or the filed data of form or trend, show real time execution curve, the history run curve of output voltage, electric current and the running frequency of each frequency converter.
Two, communication Design between S7-200 PLC and frequency converter
1, data communication design
CPU and outside exchanges data are that data communication adopts parallel communication and two kinds of modes of serial communication.
(1) parallel communication.During parallel communication, transmit simultaneously each position of data, can word or byte to be that unit is parallel carry out.Parallel communication speed is fast, but the connection of use is many, cost is high, therefore should not carry out telecommunication.
(2) serial communication.During serial communication, data are that one one order transmits, and only use seldom several order wires.The speed of serial transfer is low, but the distance transmitting can be very long.In PLC network, transmitting the data overwhelming majority is to adopt serial mode.
From the interactive mode of communicating pair information, serial communication mode has following three kinds:
1. simplex: only have the information of a direction transmit and do not have reciprocal mutual.
2. half-duplex operation: communicating pair can send (reception) information simultaneously, but two-way transmission simultaneously.
3. full-duplex communication: communicating pair can send and receive information simultaneously, both sides' sending and receiving device is worked simultaneously.
Simplex can not be realized both sides' exchange of information, therefore seldom use in PLC network; And half-duplex and full-duplex communication can realize the transmission of both sides' data, therefore application is a lot of in PLC network.
In serial communication, the figure place of middle transmission per second for transfer rate (bps) represent, be referred to as bit rate (bit/s).Conventional standard transmission speed has 1200,2400,4800,9600 and 19200 bit/s etc.
2, serial Communication Design
What serial communication adopted is the hardware and software agreement of design.
In software protocol, stipulated baud rate, the word length of signal, the meaning of expression, and can according to special needs, have been defined by deviser.Typical serial communication hardware standard is RS232 and RS485 communication interface, and they have defined voltage, impedance, but software protocol are not defined.
Described RS232C is serial communication interface, is only applicable to two communications between equipment not far from one another, and each RS232C interface has two physical connectors (plug), DTE side (contact pin one side) is public, that connect it is mother, and DCE side (one side of pin hole) is female, and what connect it is public affairs.During use, the serial ports of computing machine is all public plug, and PLC end is female, and the plug connected with them is just in time contrary.
In many Industry Control and communication system, RS485 standard operation is in half-duplex mode, and it designs for carrying out communication between many machines, has very high noise resisting ability, and allows to be operated in over distance occasion (can reach 1000 meters).All standard Siemens frequency converters have a serial line interface to adopt RS485 two-wire to connect.Single RS485 link can connect at most 31 frequency converters, and can find according to the address of each frequency converter or employing broadcast message the frequency converter needing.In link, need to have a main control equipment, each frequency converter is the control object of subordinate.
Beneficial effect of the present invention is that the application of frequency converter has not only improved production efficiency and the energy-saving effect of production run greatly, and can be in pulpit the running status of remote monitoring frequency converter, alleviate to greatest extent operating personnel's burden, improve working environment, improve the automatization level of enterprise
Embodiment
Example one, a kind of frequency converter supervisory system
(1), system work process analysis design
1, in frequency converter operation control interface, can control frequency converter operation, the state such as stop.When click with " RUN " printed words button time, because this button has been set up annexation with a binary process variable, this binary process variable is corresponding with an input point of S7-200 PLC CPU224 XP, click the input point that this button has just equaled to connect S7-200 PLC CPU224 XP, now in trapezoid figure program, the normally opened contact closed energy stream corresponding with input point flow through the connection of this program segment driving PLC output point, also just equal to supress the operation key on frequency converter primary operation panel, so frequency converter starts operation.In like manner, can press low-converter and move that stop button in control interface, frequency increase button, frequency reduces button and failure reset button is controlled frequency converter.
2,, in frequency converter running state monitoring picture, can monitor output current, output voltage and the running frequency of frequency converter.This tittle also by one, has been endowed the process variable of MODBUS address and corresponding relation has been set up in the address in S7-200 PLC CPU224 XP variable storage district.When normally working, system can with interval sometime, read by control program the data of frequency converter actual motion.These data are first stored in the variable storage district of PLC, then through certain transformational relation, via the serial communication interface of PLC, are delivered in WinCC configuration picture and show.
The described WinCC V5.1 Real-time Database of Configuration Software function of passing through, process values is filed, then with formal output active procedure value or the filed data of form or trend, show real time execution curve, the history run curve of output voltage, electric current and the running frequency of each frequency converter.
(2), communication Design between S7-200 PLC and frequency converter
1, data communication design
CPU and outside exchanges data are that data communication adopts parallel communication and two kinds of modes of serial communication.
(1) parallel communication.During parallel communication, transmit simultaneously each position of data, can word or byte to be that unit is parallel carry out.Parallel communication speed is fast, but the connection of use is many, cost is high, therefore should not carry out telecommunication.
(2) serial communication.During serial communication, data are that one one order transmits, and only use seldom several order wires.The speed of serial transfer is low, but the distance transmitting can be very long.In PLC network, transmitting the data overwhelming majority is to adopt serial mode.
From the interactive mode of communicating pair information, serial communication mode has following three kinds:
1. simplex: only have the information of a direction transmit and do not have reciprocal mutual.
2. half-duplex operation: communicating pair can send (reception) information simultaneously, but two-way transmission simultaneously.
Full-duplex communication: communicating pair can send and receive information simultaneously, both sides' sending and receiving device is worked simultaneously.
Simplex can not be realized both sides' exchange of information, therefore seldom use in PLC network; And half-duplex and full-duplex communication can realize the transmission of both sides' data, therefore application is a lot of in PLC network.
In serial communication, the figure place of middle transmission per second for transfer rate (bps) represent, be referred to as bit rate (bit/s).Conventional standard transmission speed has 1200,2400,4800,9600 and 19200 bit/s etc.
2, serial Communication Design
What serial communication adopted is the hardware and software agreement of design.
In software protocol, stipulated baud rate, the word length of signal, the meaning of expression, and can according to special needs, have been defined by deviser.Typical serial communication hardware standard is RS232 and RS485 communication interface, and they have defined voltage, impedance, but software protocol are not defined.
Described RS232C is serial communication interface, is only applicable to two communications between equipment not far from one another, and each RS232C interface has two physical connectors (plug), DTE side (contact pin one side) is public, that connect it is mother, and DCE side (one side of pin hole) is female, and what connect it is public affairs.During use, the serial ports of computing machine is all public plug, and PLC end is female, and the plug connected with them is just in time contrary.
In many Industry Control and communication system, RS485 standard operation is in half-duplex mode, and it designs for carrying out communication between many machines, has very high noise resisting ability, and allows to be operated in over distance occasion (can reach 1000 meters).All standard Siemens frequency converters have a serial line interface to adopt RS485 two-wire to connect.Single RS485 link can connect at most 31 frequency converters, and can find according to the address of each frequency converter or employing broadcast message the frequency converter needing.In link, need to have a main control equipment, each frequency converter is the control object of subordinate.
Beneficial effect of the present invention is that the application of frequency converter has not only improved production efficiency and the energy-saving effect of production run greatly, and can be in pulpit the running status of remote monitoring frequency converter, alleviate to greatest extent operating personnel's burden, improve working environment, improve the automatization level of enterprise.
Claims (7)
1. a frequency converter supervisory system, is characterized in that described system work process analysis is designed to can control the operation of frequency converter in frequency converter operation control interface, the state such as stops; In frequency converter running state monitoring picture, can monitor output current, output voltage and the running frequency of frequency converter.
2. a kind of frequency converter supervisory system as claimed in claim 1, binary process variable is corresponding with an input point of S7-200 PLC CPU224 XP, click the input point that this button has just equaled to connect S7-200 PLC CPU224 XP, now in trapezoid figure program, the normally opened contact closed energy stream corresponding with input point flow through the connection of this program segment driving PLC output point, also just equal to supress the operation key on frequency converter primary operation panel, so frequency converter starts operation; When normally working, system can with interval sometime, read by control program the data of frequency converter actual motion; These data are first stored in the variable storage district of PLC, then through certain transformational relation, via the serial communication interface of PLC, are delivered in WinCC configuration picture and show.
3. a communication Design between the S7-200 PLC described in frequency converter supervisory system and frequency converter, is characterized in that: CPU and outside exchanges data are that data communication adopts parallel communication and two kinds of modes of serial communication;
(1) parallel communication: during parallel communication, transmit simultaneously each position of data, can word or byte to be that unit is parallel carry out
(2) serial communication: during serial communication, data are that one one order transmits, and only use seldom several order wires; What serial communication adopted is the hardware and software agreement of design.
4. baud rate, the word length of signal, the meaning of expression have been stipulated as claimed in claim 3 in the software protocol described in a kind of frequency converter supervisory system, typical serial communication hardware standard is RS232 and RS485 communication interface, they have defined voltage, impedance, but software protocol are not defined.
5. the serial communication mode described in a kind of frequency converter supervisory system has following three kinds as claimed in claim 3:
1. simplex: only have the information of a direction transmit and do not have reciprocal mutual;
2. half-duplex operation: communicating pair can send (reception) information simultaneously, but two-way transmission simultaneously;
3. full-duplex communication: communicating pair can send and receive information simultaneously, both sides' sending and receiving device is worked simultaneously.
6. the RS232C described in a kind of frequency converter supervisory system is serial communication interface as claimed in claim 3, be only applicable to two communications between equipment not far from one another, each RS232C interface has two physical connectors (plug), and DTE side (contact pin one side) is public, and that connect it is mother, DCE side (one side of pin hole) is female, what connect it is public affairs, and during use, the serial ports of computing machine is all public plug, and PLC end is female, the plug connected with them is just in time contrary.
7. the RS485 standard operation described in a kind of frequency converter supervisory system as claimed in claim 3, under half-duplex mode, it designs for carrying out communication between many machines, frequency converter has a serial line interface to adopt RS485 two-wire to connect, single RS485 link can connect at most 31 frequency converters, and can find according to the address of each frequency converter or employing broadcast message the frequency converter needing, in link, need to have a main control equipment, each frequency converter is the control object of subordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068433.6A CN104035382A (en) | 2013-03-05 | 2013-03-05 | Frequency converter monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068433.6A CN104035382A (en) | 2013-03-05 | 2013-03-05 | Frequency converter monitoring system |
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| Publication Number | Publication Date |
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| CN104035382A true CN104035382A (en) | 2014-09-10 |
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| CN201310068433.6A Pending CN104035382A (en) | 2013-03-05 | 2013-03-05 | Frequency converter monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974875A (en) * | 2015-03-13 | 2016-09-28 | 发那科株式会社 | Monitoring device with function of extracting and displaying branch circuit in ladder program |
| CN108337105A (en) * | 2017-12-18 | 2018-07-27 | 成都飞机工业（集团）有限责任公司 | A kind of bus communication control method of frequency converter |
| CN116684453A (en) * | 2023-04-10 | 2023-09-01 | 山东凯斯达机械制造有限公司 | Inverter remote management method, system, terminal and storage medium |
-
2013
- 2013-03-05 CN CN201310068433.6A patent/CN104035382A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974875A (en) * | 2015-03-13 | 2016-09-28 | 发那科株式会社 | Monitoring device with function of extracting and displaying branch circuit in ladder program |
| CN108337105A (en) * | 2017-12-18 | 2018-07-27 | 成都飞机工业（集团）有限责任公司 | A kind of bus communication control method of frequency converter |
| CN116684453A (en) * | 2023-04-10 | 2023-09-01 | 山东凯斯达机械制造有限公司 | Inverter remote management method, system, terminal and storage medium |
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Application publication date: 20140910 |