CN108105095A - A kind of fieldbus based screw air compressor group control system - Google Patents
A kind of fieldbus based screw air compressor group control system Download PDFInfo
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- CN108105095A CN108105095A CN201611054389.3A CN201611054389A CN108105095A CN 108105095 A CN108105095 A CN 108105095A CN 201611054389 A CN201611054389 A CN 201611054389A CN 108105095 A CN108105095 A CN 108105095A
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- China
- Prior art keywords
- air compressor
- compressor machine
- control system
- screw air
- group control
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
Abstract
A kind of fieldbus based screw air compressor group control system, field bus technique is applied to the design of screw air compressor group control system, it develops to convert screw air compressor contact signal and the terminal communication unit of fieldbus data, the control strategy of screw air compressing group of planes coordinated signals is proposed, gives framework mode, the hardware and software design of control system；Host computer realizes Energy Saving Control algorithm, while completes the functions such as real-time acquisition, display, storage and the inquiry to air compressor machine data.The system interface is friendly, stable, and energy-saving effect is apparent, has very strong application value.
Description
Technical field
The present invention relates to a kind of fieldbus based screw air compressor group control system, suitable for machinery field.
Background technology
Stability that screw air compressor has with it is high, efficient, with small vibration, low noise advantages are popularized in enterprise
Using.During screw air compressor is promoted and applied, raising and famous foreign with China's screw air compressor manufacture level
Brand air compressor machine producing jointly at home so that the leeway of domestic industrial and mining enterprises' selection different brands screw air compressor is increasingly
Greatly, simultaneously because the factors such as the service life of screw air compressor longer, the superseded update cycle is longer, cause domestic many indirectly
In industrial and mining enterprises, different brands, different model, the present situation of the screw air compressor Parallel running of different dates of manufacture.Due to early stage
The screw air compressor of production is without bus communication function, even if the half of screw air compressor machine that air compressor machine producer produces in the recent period has
Communication interface (most situations do not have communication protocol or communication protocol is inconsistent), it is also not possible to directly be led to by air compressor machine
Believe that interface carries out coordinated signals to the air compressor machine in air compression station in enterprise, so as to cause air compression station in most domestic industrial and mining enterprises
In air compressor machine be in manually-operated unit operation pattern.Due to influences such as the human factors during manual operation so that
Air compressor group operational efficiency is low in entire air compression station, and energy waste is serious.
With the reinforcement that the requirement of national energy-saving emission reduction policy and industry energy conservation are realized, there is an urgent need to a set of automations for enterprise
Control system manages the reasonable operation of entire air compressor group in air compression station, to improve the operational efficiency of air compressor group.By right
Air compressor machine in enterprise's air compression station is fully investigated, and discovery can be by the control circuit of transfer portion air compressor machine, by screw air compressing
The information such as the working condition of machine and alarm, failure are exported by the form of contact signal, while can also be controlled by contact signal
The action of air compressor machine.Therefore, develop to gather air compressor machine working condition and warning message and air compressor machine is started, is added
The air compressor machine terminal communication converting unit carry, unloaded, shut down control, realizes to different brands, different model, different produces days
The screw air compressor of phase automatically controls.It simultaneously also can be according to the operation and shutdown status of air compressor machine to the cold of water-cooled air compressor
But penstock carries out switching control.
The content of the invention
The present invention proposes a kind of fieldbus based screw air compressor group control system, by field bus technique application
In the design of screw air compressor group control system, develop to convert screw air compressor contact signal and fieldbus data
Terminal communication unit, it is proposed that the control strategy of screw air compressing group of planes coordinated signals gives the framework mode, hard of control system
Part and Software for Design；Host computer realizes Energy Saving Control algorithm, while completes real-time acquisition, display, the storage to air compressor machine data
With inquiry etc. functions.
The technical solution adopted in the present invention is：
The screw air compressor group control system is mainly whole by Monitor Computer Control System, slave computer PLC control system and air compressor machine
Hold communication unit composition.Host computer (industrial personal computer) reads information from slave computer PLC, in real time after processing, by system supply gas pressure, sky
The presentation of information such as press state are on host computer；Slave computer PLC reads each air compressor machine terminal communication unit in real time by 485 buses
The air compressor machine status information collected, while the control information that host computer man-machine interface is inputted is handed down to the communication of air compressor machine terminal
Unit；Air compressor machine terminal communication unit is responsible for the contact signal of air compressor machine output being converted into 485 bus datas, while by bottom
Machine PLC is converted into the action that contact signal removes to control each air compressor machine and cooling water valve by the control information that 485 buses issue.
Slave computer PLC is gathered by I/O mouthfuls and is controlled the working condition of cooling driers.
The air compressor machine terminal communication unit is aided with Guangzhou using 51 kernel microcontroller of Silicon Labs companies as core
485 communication isolation module RSM485 of Zhi Yuan Co., Ltds has built the conversion for 485 communications for meeting industrial environment requirement
Unit.
The slave computer use Siemens's S7200 series of PLC, mainly Free programming by way of and air compressor machine terminal
Communication unit communication, to complete to the warning message of each air compressor machine and the acquisition of working condition and by the operation result of control algolithm
Export the operations such as loading, unloading, startup, the shutdown for controlling air compressor machine.
The Monitor Computer Control System is mainly responsible for the setting for sending entire air supply system and each air compressor machine parameter, modification life
Order, the startup of air compressor machine, shutdown, loading, the manual control commands of unloading；Pass through multithreading operation real-time reception slave computer PLC
The air supply system and the operation information of each air compressor machine that collect simultaneously are shown and are stored on host computer, for operating personnel couple
The monitoring of whole system.
The beneficial effects of the invention are as follows：The system interface is friendly, stable, and energy-saving effect is apparent, has very strong answer
With value.
Description of the drawings
Fig. 1 is the system global structure figure of the present invention.
Fig. 2 is the PLC control system primary control program flow chart of the present invention.
Fig. 3 is the Monitor Computer Control System main program flow chart of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, screw air compressor group control system is mainly by Monitor Computer Control System, slave computer PLC control system and sky
Press terminal communication unit forms.Host computer (industrial personal computer) reads information from slave computer PLC, and in real time after processing, system is supplied
The presentation of information such as pressure, air compressor machine state are on host computer；Slave computer PLC reads each air compressor machine terminal in real time by 485 buses
The air compressor machine status information that communication unit collects, while the control information of the defeated people of host computer man-machine interface is handed down to air compressor machine
Terminal communication unit；Air compressor machine terminal communication unit is responsible for the contact signal of air compressor machine output being converted into 485 bus datas, together
When slave computer PLC be converted into contact signal by the control information that 485 buses issue go to control each air compressor machine and cooling water valve
The action of door.Slave computer PLC is gathered by I/O mouthfuls and is controlled the working condition of cooling driers.
Screw air compressor group control system major function has：(1) self-checking function.It can be checked with this function in control system
Whether each compressor networks；(2) parameter setting function.Set system pressure parameter and each air compressor machine initial during system initialization
Parameter.Can modify to system pressure parameter, each parameter of air compressor machine in system operation and be preserved for a long time on demand at any time (has password
Protection)；(3) remote control function.Starting and stopping control is remotely carried out to air compressor machine by 485 buses, is controlled after air compressor machine disorderly closedown
System processed automatically terminates its joint control pattern；(4) air supply system function is monitored in real time.Any air compressor machine breaks down in system, horse
Upper pop-up display is abnormal, the alarm screen of failure cause, sends sound-light alarm and reminds operator；(5) operating parameter real-time display
Function.System pressure, metered flow data and each compressor behavior real-time display over the display, so that system is joined
The operating condition of several, each compressor is very clear；(6) alarm failure and historical data information management function.System 3 can be preserved
Year or more alarm, failure, 3 years or more system operational parameters (system per 30s preserve an operating parameter) information can be preserved；
(7) query function.It can according to condition inquire about, the system operational parameters information in history of printing database, inquiry, type information have
Having time mark is not.
Air compressor machine terminal communication unit mainly sets up slave computer PLC to different brands, different model, different produces days
The screw air compressor of phase carries out the bridge of information gathering and control.The information of acquisition is free compressor operation status information and output sky
Point stifled, filter such as blocks up at the signals such as warning messages and the disorderly closedown of air compressor controller output；It simultaneously can be by air compressor group
The air compressor machine that control system is sent starts, shuts down, loading, unloader signal is acted with the form control air compressor machine of contact signal.
Air compressor machine terminal communication unit is aided with Guangzhou and causes far using 51 kernel microcontroller of Silicon Labs companies as core
485 communication isolation module RSM485 of Co., Ltd has built the conversion list for 485 communications for meeting industrial environment requirement
Member.
When the passive contact of air compressor machine state output is closed, the I/O mouths of microcontroller will detect high level, so can
Judge the warning messages such as operating statuses and alarm, failure such as loading, unloading, shutdown of air compressor machine.
The operating process such as air compressor machine terminal communication unit starts air compressor machine, loading, unloading, shutdown are, defeated by I/O mouthfuls
Go out high level, drive solid-state relay, go to be closed the passive dry contact of air compressor machine at this time, when exporting low level for I/O mouthfuls, solid-state
The driving circuit of relay disconnects, the passive contact signal that entire circuit is disconnected by solid-state relay output one at this time, so as to
A pulse signal is generated to control the startup of air compressor machine, shutdown, loading and unloading operation, so as to complete the control to air compressor machine
Function.
Such as Fig. 2, slave computer uses Siemens's S7200 series of PLC, mainly by way of Free programming and air compressor machine is whole
Communication unit communication is held, to complete to the warning message of each air compressor machine and the acquisition of working condition and by the computing knot of control algolithm
The operations such as loading, unloading, startup, shutdown of the fruit output for controlling air compressor machine.
PLC realizes that the reading and writing to each register of microcontroller operate as main website.Each one 7 byte long of transmission of PLC
It instructs to realize a read/write operation.
Bebinning character.Bebinning character indicates the beginning of instruction, is defined as in use " 55 " of ASCII character, different
Air compressor machine Terminal Control Element slave station can also define different bebinning characters with receive be directed to the terminal communication unit finger
Order.
Microcontroller station address.Target air compressor machine terminal communication unit station address occupy instruction a byte, with 16 into
The form of ASCII character processed represents the station address of target air compressor machine terminal communication unit.
Instruction type.Two bytes that the function code occupies instruction are used for the type of flags instruction, and author is with 00 06H generations
Table read operation, 0007H represent write operation.
Data field.Data field occupies two bytes of instruction, represents working condition, warning message and the air compressor machine of air compressor machine
The information such as control.
PLC program implementation procedure.PLC performs initialization subroutine when scanning first time, and port and XMT instructions are carried out
Initialization.After the completion of initialization, timer interrupt sub routine is performed.Interrupt timing arrives, and performs transmission program.Timing transmission program
Reset first timer, calculate interrupt communication unit addresses, reset serial ports receive capabilities flag bit and will be with " 55 " beginnings " AA "
The instruction of ending is sent by serial ports, and after being sent completely, generation is sent completely interruption.Being sent completely interrupt service routine makes
Energy serial ports receive capabilities flag bit is used for receiving serial data, and after serial data finishes receiving, generation finishes receiving interrupt event.
Interrupt event is completed for extraction of air compressor machine parameter information etc..
Such as Fig. 3, Monitor Computer Control System is mainly responsible for the setting for sending entire air supply system and each air compressor machine parameter, modification
Order, the startup of air compressor machine, shutdown, loading, the manual control commands of unloading；Pass through multithreading operation real-time reception slave computer
Air supply system and the operation information of each air compressor machine that PLC is collected simultaneously are shown and are stored on host computer, for operator
Monitoring of the member to whole system.
Data acquisition.Read supply gas pressure, the pneumatics for the gas transmission pipeline net work that slave computer PLC is collected in real time by PPT agreements
The information such as control model, warning message and the working condition of machine；
Data are shown.It can be with the alarm during the supply gas pressure and compressor operation of real-time display air supply system and status information
Deng；
Data store.On the one hand number of units that Monitor Computer Control System configures air compressor machine in system configuration information such as system, pneumatics
Machine Load-unload time delay unloads stop delay time, the information such as power, rated discharge amount, the loading priority of each air compressor machine
It stores in the parameter configuration table in database；On the other hand by the real-time supply gas pressure in system operation, the alarm of air compressor machine,
The information such as failure, loading, unloading, shutdown are stored into the different historical data tables in database；
Data query.User can the alarm to all air compressor machines in air compressor machine unit or air supply system, operating status by date
Etc. historical datas inquired about in table form；Supply gas pressure is inquired about in graph form by date, data energy root
According to needing Pagination Display；
Data analysis.Can programming count go out the maximum supply gas pressure of gas transmission pipeline net work in one day, minimum supply gas pressure, each air compressor machine
Loading, discharge time and load factor etc.；
Sound-light alarm.When system pressure is less than setting low pressure limit, system sends sound, light warning reminding user every 30；When
Occur alarming during compressor operation or during failure, system sends sound, light warning reminding user at once；Upper and lower machine communicates
If occurring communication failure in the process, system sends sound, light warning reminding user at once.
Claims (4)
1. a kind of fieldbus based screw air compressor group control system, it is characterized in that：The screw air compressor group control system
System is mainly made of Monitor Computer Control System, slave computer PLC control system and air compressor machine terminal communication unit.
2. a kind of fieldbus based screw air compressor group control system according to claim 1, it is characterized in that：Institute
Air compressor machine terminal communication unit is stated using 51 kernel microcontroller of Silicon Labs companies as core, is aided with Guangzhou and causes remote limited public affairs
485 communication isolation module RSM485 are taken charge of, have built the converting unit for 485 communications for meeting industrial environment requirement.
3. a kind of fieldbus based screw air compressor group control system according to claim 1, it is characterized in that：It is described
Slave computer uses Siemens's S7200 series of PLC, is mainly led to by way of Free programming with air compressor machine terminal communication unit
Letter, to complete to export to control to the warning message of each air compressor machine and the acquisition of working condition and by the operation result of control algolithm
The operations such as loading, unloading, startup, the shutdown of air compressor machine processed.
4. a kind of fieldbus based screw air compressor group control system according to claim 1, it is characterized in that：It is described
Monitor Computer Control System is mainly responsible for the setting for sending entire air supply system and each air compressor machine parameter, modification order, air compressor machine
Start, shut down, loading, the manual control commands of unloading；The supply collected by multithreading operation real-time reception slave computer PLC
The operation information of system and each air compressor machine is simultaneously shown and is stored on host computer, for operating personnel to the prison of whole system
Depending on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054389.3A CN108105095A (en) | 2016-11-25 | 2016-11-25 | A kind of fieldbus based screw air compressor group control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054389.3A CN108105095A (en) | 2016-11-25 | 2016-11-25 | A kind of fieldbus based screw air compressor group control system |
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| Publication Number | Publication Date |
|---|---|
| CN108105095A true CN108105095A (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611054389.3A Pending CN108105095A (en) | 2016-11-25 | 2016-11-25 | A kind of fieldbus based screw air compressor group control system |
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| CN (1) | CN108105095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856973A (en) * | 2022-04-24 | 2022-08-05 | 惠州市卓锐机电设备有限公司 | Intelligent group control energy-saving system and method for air compressors |
| CN115263735A (en) * | 2022-08-06 | 2022-11-01 | 广东鑫钻节能科技股份有限公司 | Data centralized management and control platform based on operation of air compression station |
-
2016
- 2016-11-25 CN CN201611054389.3A patent/CN108105095A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856973A (en) * | 2022-04-24 | 2022-08-05 | 惠州市卓锐机电设备有限公司 | Intelligent group control energy-saving system and method for air compressors |
| CN115263735A (en) * | 2022-08-06 | 2022-11-01 | 广东鑫钻节能科技股份有限公司 | Data centralized management and control platform based on operation of air compression station |
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Application publication date: 20180601 |