CN109871585A - Drawing control method and system - Google Patents
Drawing control method and system Download PDFInfo
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- CN109871585A CN109871585A CN201910047876.4A CN201910047876A CN109871585A CN 109871585 A CN109871585 A CN 109871585A CN 201910047876 A CN201910047876 A CN 201910047876A CN 109871585 A CN109871585 A CN 109871585A
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Abstract
The invention discloses a kind of drawing control method and systems, by the first cad file that original CAD diagram paper file and default PLC control parameter are converted into format, HMI parses the first cad file and obtains default PLC control parameter and path coordinate collection and send it to PLC by specific HMI-PLC agreement, so that PLC completes interpolation and draws according to default PLC control parameter and path coordinate collection control drawing movement mechanism, the technical problem for overcoming the communication speed that drawing control method exists in the prior art slow, realize data rapid communication, and transmit the highly-safe of data.
Description
Technical field
The present invention relates to drawing fields, especially drawing control method and system.
Background technique
PLC: programmable logic controller (PLC).
HMI is the abbreviation of Human Machine Interface, and " man-machine interface " is also man-machine interface, also refers to man-machine friendship
Mutual equipment.Man-machine interface (also known as user interface or user interface) is to interact between system and user and information exchange
Medium, the internal form and the mankind that it realizes information can receive conversion between form.
HMI is made of hardware and software two parts, is the hardware components schematic diagram of HMI, Hardware Subdivision subpackage with reference to Fig. 1, Fig. 1
Processor, display unit, input unit, communication interface, data storage cell etc. are included, wherein the performance of processor determines HMI
The performance height of product, is the core cell of HMI.Different according to the product hierarchy of HMI, processor can select 8,16 respectively
Position, 32 processors.HMI software is generally divided into two parts, that is, the system software run in HMI hardware and runs on PC machine
Picture configuration software (such as JB-HMI picture configuration software) under Windows operating system.User must first use HMI
Picture configuration software development " project file ", then by the serial communication interface of PC machine and HMI product, " the engineering woven
File " is downloaded in the processor of HMI and is run.HMI can also connect programmable controller (PLC), frequency converter, DC speed regulation
The industrial control equipments such as device, instrument, are shown using display unit, are written by input unit (such as touch screen, keyboard, mouse)
Running parameter or input operational order, realize that people interacts with machine information.
It is known that many industries still use the scheme of " industrial personal computer+motion controller ", flexibility is lower, than cumbersome, at
This is higher.In industrial production, automatic path planning simultaneously executes the important topic that corresponding operating is industrial automation.Pass through
The combination of PLC and CAD path locus can apply on by fields such as Antiinterference, cutting, dispensings, in many opposite sex or compare
Complicated product can save greatly artificial and time cost when processing.For example, the figure that AutoCAD Software on Drawing is generated
It imported into PLC, drives 2 servo motors that can easily reach the demand that plane motion controls by PLC, but this scheme is logical
It is slow to interrogate speed, normal production work is seriously affected, therefore, it is necessary to improve to this technology.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide drawing control method and system, for improving the communication speed of drawing control method.
Technical solution used by the embodiment of the present invention is:
In a first aspect, providing a kind of drawing control method, comprising:
CAD diagram paper file pre-treatment step: original CAD diagram paper file and default PLC control parameter are converted to certain number
According to the first cad file of format；
HMI sending step: HMI parses to obtain the default PLC control parameter according to first cad file and path is sat
Mark collection, and the default PLC control parameter and the path coordinate collection are sent to by PLC according to specific HMI-PLC agreement；
Drawing step: the PLC controls drawing fitness machine according to the default PLC control parameter and the path coordinate collection
Structure carries out interpolation drawing.
Further, the CAD diagram paper file pre-treatment step includes:
CAD diagram paper file data extracts sub-step: being gone forward side by side walking along the street according to the original CAD diagram paper file extraction document data
Diameter is planned to obtain the path coordinate collection；
Conversion sub-step: it converts to obtain the first CAD according to the path coordinate collection and the default PLC control parameter
File.
Further, the drawing step includes:
The running parameter of the PLC is arranged according to the default PLC control parameter by the PLC；
The PLC generates final path according to the default PLC control parameter, the path coordinate collection and interpolation algorithm
Coordinate set carries out interpolation drawing to control drawing movement mechanism.
Further, the default PLC control parameter includes that file total bytes and/or figure number and/or figure are total
Byte number and/or figure title and/or PLC control planar system number and/or plotting speed and/or acceleration and deceleration and/or offset
Amount.
Further, the path coordinate collection include graphics path number of lines and/or the line style of type and/or actual situation line and/
Or lines coordinate data.
Further, the drawing control method further include:
Feedback display step: when the PLC controls the drawing movement mechanism progress interpolation drawing, current drawing is sat
Mark Real-time Feedback is shown to the HMI.
Second aspect provides a kind of drawing control system, comprising:
CAD diagram paper file pretreatment unit, for executing CAD diagram paper file pre-treatment step, by original CAD diagram paper file
The first cad file of format is converted to default PLC control parameter；
HMI, for executing HMI sending step, the HMI parses to obtain the default PLC according to first cad file
Control parameter and path coordinate collection, and according to specific HMI-PLC agreement by the default PLC control parameter and the path coordinate
Collection is sent to PLC；
Image-drawing unit, for executing drawing step, the PLC is sat according to the default PLC control parameter and the path
Mark collection control drawing movement mechanism carries out interpolation drawing.
Further, the CAD diagram paper file pretreatment unit includes:
CAD diagram paper file data extraction module, for according to the original CAD diagram paper file extraction document data and carrying out
Path planning is to obtain the path coordinate collection；
Conversion module, for converting to obtain described first according to the path coordinate collection and the default PLC control parameter
Cad file.
Further, the running parameter of the PLC is arranged according to the default PLC control parameter by the PLC；
The PLC generates final path according to the default PLC control parameter, the path coordinate collection and interpolation algorithm
Coordinate set carries out interpolation drawing to control drawing movement mechanism.
Further, the drawing control system further include:
Feedback display unit, for executing feedback display step, the PLC controls the drawing movement mechanism and carries out interpolation
When drawing, current drawing coordinate Real-time Feedback to the HMI is shown.
The beneficial effects of the present invention are:
The present invention is by being converted into the first of format for original CAD diagram paper file and default PLC control parameter
Cad file, HMI parse the first cad file and obtain default PLC control parameter and path coordinate collection and assisted by specific HMI-PLC
View sends it to PLC, so that PLC completes to insert according to default PLC control parameter and path coordinate collection control drawing movement mechanism
It mends and draws, the technical problem for overcoming the communication speed that drawing control method exists in the prior art slow realizes data and quickly leads to
News, and transmit the highly-safe of data.
In addition, the present invention realizes that interpolation is drawn also according to path coordinate collection and interpolation algorithm.
Detailed description of the invention
Fig. 1 is the hardware components schematic diagram of HMI；
Fig. 2 is a specific embodiment method flow diagram of drawing control method in the present invention；
Fig. 3 is a specific embodiment specific flow chart of drawing control method in the present invention；
Fig. 4 is that HMI transmits a specific embodiment schematic diagram of data to PLC in drawing control method in the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Embodiment 1
For the technical problem that the communication speed of known drawing control method is slow, for this purpose, Fig. 2 is the present invention with reference to Fig. 2
One specific embodiment method flow diagram of middle drawing control method；Embodiment 1 provides a kind of drawing control method, comprising:
CAD diagram paper file generated step: using mapping software track drafting and original CAD diagram paper file is generated；
CAD diagram paper file pre-treatment step: extracting effective information for original CAD diagram paper file, and by effective information and
Default PLC control parameter is converted to the first cad file of format；
HMI sending step: HMI parses to obtain default PLC control parameter and path coordinate collection according to the first cad file, and
Default PLC control parameter and path coordinate collection are sent to PLC according to specific HMI-PLC agreement；
Drawing step: PLC carries out interpolation and draws according to default PLC control parameter and path coordinate collection control drawing movement mechanism
Figure；
Feedback display step: when PLC controls the progress interpolation drawing of drawing movement mechanism, current drawing coordinate is anti-in real time
HMI is fed to be shown.
The drawing control method of the present embodiment, can be simply and effectively by original CAD diagram paper file by the first cad file
Drawing information pass to HMI device and be read out and handle, then by specific HMI-PLC sending and receiving data protocol realization HMI with
Data communication between PLC, guarantees the correctness of data transmission, and can guarantee that the speed of data communication is fast, data transmission
It is highly-safe, drawing control method is easy to operate, practical.It is transported in addition, being drawn in conjunction with HMI and PLC using CAD data control
Motivation structure carries out Automatic Drawing, and monitors drawing progress in real time, and staff is facilitated to check manufacturing schedule.
Drawing control method is illustrated below, is a tool of drawing control method in the present invention with reference to Fig. 3, Fig. 3
Body embodiment specific flow chart:
S1, CAD diagram paper file generated step: control track is drawn using CAD Software for producing and generates .dxf file, specifically
It can use one of mapping softwares such as AutoCAD, CAXA, 3DMax and generate original CAD diagram paper file,
S2, CAD diagram paper file pre-treatment step:
Original CAD diagram paper file is imported in the upper software client of PLC, is extracted using the upper software client of PLC former
The effective information of beginning CAD diagram paper file parses original CAD diagram paper file to extract CAD coordinate data, then plans by path
Algorithm obtains path coordinate collection；Wherein, path coordinate collection includes graphics path number of lines, the line style of type (line segment, circular arc, sample
Item), actual situation line, lines coordinate data.
It converts to obtain the first cad file further according to path coordinate collection and default PLC control parameter, presets PLC control parameter
Including file total bytes, figure number, figure total bytes, figure title, PLC control planar system number, plotting speed,
Path coordinate collection and default PLC control parameter are generated the first CAD text by the encryption of specific data format by acceleration and deceleration, offset
Part, document definition are .ssd type；Wherein, an example of the program of specific data format is as follows:
Wherein, the data of the start-up portion of program are used to PLC, and PLC can therefrom extract useful data as needed.Separately
Outside, " solid line, dotted line " representative be meant that the straight line be assist to complete graphic plotting in resolving adding or
Itself contains the straight line in CAD diagram, is referred to as " lost motion " in the straight line of numerical control industry, auxiliary addition.Containing in CAD diagram is solid line,
Without for dotted line.With " (nothing) " printed words, represent temporarily without the content.
S3, HMI sending step:
By USB flash disk or USB port to HMI import the first cad file and in HMI can with the figure of the first cad file of preview,
Wherein, in the present embodiment, the display unit of HMI is touch screen, and user can use it and directly input control instruction to control HMI
Work and display information.The first cad file list directory is generated on the left side of HMI picture, the right of picture provides picture
The first cad file that window is currently chosen for preview.In addition, having " downloading to PLC " button in HMI picture, " downloading is clicked
The data (data refer to default PLC control parameter and path coordinate collection) of selected file can be passed through to PLC " button specific
HMI-PLC agreement is sent to PLC.
Specifically, HMI is responsible for receiving the first newly-generated cad file, it is decrypted to obtain default PLC control ginseng
Default PLC control parameter and path coordinate collection are generated data frame, data by specific HMI-PLC agreement by several and path coordinate collection
Data are passed to PLC by specific transmission flow by serial ports by frame.The regulation of specific HMI-PLC agreement includes HMI start frame and PLC
It returns to frame format, HMI data frame and PLC and returns to frame format, HMI end frame and PLC return frame format.Each frame includes specific
Function code, transmission or returned data, CRC check；For example, 0x83 is the starting function code that HMI sends data to PLC；0x84 is
HMI sends the data function code of data to PLC；The format of various data frames is specific as follows:
1, the format of HMI start frame:
The return frame format of the PLC of corresponding above-mentioned HMI start frame:
2, the format of HMI data frame:
The return frame format of the PLC of corresponding above-mentioned HMI data frame:
3, the format of HMI end frame:
The return frame format of the PLC of corresponding above-mentioned HMI end frame:
As shown in figure 4, Fig. 4 is that HMI is illustrated to a specific implementation of PLC transmission data in drawing control method in the present invention
Be intended to, HMI is sent to PLC by specific transmission flow and presets PLC control parameter and path coordinate collection, specifically: HMI first to
PLC sends HMI start frame, and PLC, which receives to empty after HMI start frame, extends out Flash, prepares downloading graphic file (i.e. default PLC
Control parameter and path coordinate collection), after preparation, PLC, which is returned, receives correct frame.If receiving frame mistake, containing frame length not to,
Initial data sends mistake, CRC check mistake etc., then PLC returns to receiving frame mistake.HMI receives the reception mistake of PLC return
Frame can retransmit HMI start frame, if repeatedly returning to mistake, HMI prompts failed download.HMI, which is sent in HMI data frame, to be contained
The frame number (which bag data frame), PLC is only receiving correct frame number and correct data just receive the frame, at mistake
It manages identical as HMI start frame.When HMI data frame receipt is completed, HMI can send HMI end frame, the frame number of HMI end frame
For special value, representative terminates, for example, the frame number of HMI end frame is 0xFFFF, representative terminates.
S4, drawing step:
The running parameter of PLC is arranged according to the default PLC control parameter received by PLC；PLC is default according to what is received
PLC control parameter, path coordinate collection and interpolation algorithm generate final path coordinate collection with control drawing movement mechanism carry out it is slotting
It mends and draws, specifically, path coordinate collection parses PLC through pel based on the received and interpolation algorithm obtains final path coordinate
Collection, and corresponding pulse is sent according to final path coordinate collection and controls its completion CAD interpolation drawing to drawing movement mechanism.
The PLC line style of type that path coordinate is concentrated based on the received takes different interpolation algorithms to carry out the acquisition of interpolated point coordinate, interpolation
Error by preset PLC control parameter in plotting speed and acceleration and deceleration determine；And Interpolation Process is complete in pulse sends and instructs
At.
S5, feedback display step:
When PLC, which sends pulse control drawing movement mechanism, carries out graphic plotting, PLC sends current drawing to HMI and sits
It is marked with feedback coordinates information, so that HMI on the display picture of HMI simultaneously draw real-time rendering CAD analog simulation figure by real-time display
Figure track facilitates user to know drawing progress.
Embodiment 2
Embodiment 2 is provided based on embodiment 1, embodiment 2 provides a kind of drawing control system, comprising:
CAD diagram paper file generating unit utilizes mapping software track drafting for executing CAD diagram paper file generated step
And generate original CAD diagram paper file；
CAD diagram paper file pretreatment unit, for executing CAD diagram paper file pre-treatment step, by original CAD diagram paper file
The first cad file of format is converted to default PLC control parameter；
HMI, for executing HMI sending step, HMI parses to obtain default PLC control parameter and road according to the first cad file
Diameter coordinate set, and default PLC control parameter and path coordinate collection are sent to by PLC according to specific HMI-PLC agreement；
Image-drawing unit, for executing drawing step, PLC draws according to default PLC control parameter and the control of path coordinate collection
Movement mechanism carries out interpolation drawing；The running parameter of PLC is arranged according to default PLC control parameter by PLC, and PLC is controlled according to default PLC
Parameter, path coordinate collection and interpolation algorithm processed generate final path coordinate collection to control the progress interpolation of drawing movement mechanism and draw
Figure；
Feedback display unit, for executing feedback display step, when PLC control drawing movement mechanism carries out interpolation drawing,
Current drawing coordinate Real-time Feedback to HMI is shown.
Wherein, CAD diagram paper file pretreatment unit includes:
CAD diagram paper file data extraction module, for being gone forward side by side walking along the street diameter according to original CAD diagram paper file extraction document data
Planning is with to acquisite approachs coordinate set；
Conversion module, for converting to obtain the first cad file according to path coordinate collection and default PLC control parameter.
The specific work process of drawing control system is repeated no more referring to the description of embodiment 1.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of drawing control method characterized by comprising
CAD diagram paper file pre-treatment step: original CAD diagram paper file and default PLC control parameter are converted to specific data lattice
First cad file of formula；
HMI sending step: HMI parses to obtain the default PLC control parameter and path coordinate according to first cad file
Collection, and the default PLC control parameter and the path coordinate collection are sent to by PLC according to specific HMI-PLC agreement；
Drawing step: the PLC according to the default PLC control parameter and the path coordinate collection control drawing movement mechanism into
Row interpolation is drawn.
2. drawing control method according to claim 1, which is characterized in that the CAD diagram paper file pre-treatment step packet
It includes:
CAD diagram paper file data extract sub-step: according to the original CAD diagram paper file extraction document data go forward side by side walking along the street diameter rule
It draws to obtain the path coordinate collection；
Conversion sub-step: it is converted to obtain the first CAD text according to the path coordinate collection and the default PLC control parameter
Part.
3. drawing control method according to claim 1, which is characterized in that the drawing step includes:
The running parameter of the PLC is arranged according to the default PLC control parameter by the PLC；
The PLC generates final path coordinate according to the default PLC control parameter, the path coordinate collection and interpolation algorithm
Collection carries out interpolation drawing to control drawing movement mechanism.
4. drawing control method according to any one of claims 1 to 3, which is characterized in that the default PLC control parameter
Plane system is controlled including file total bytes and/or figure number and/or figure total bytes and/or figure title and/or PLC
Unified editing number and/or plotting speed and/or acceleration and deceleration and/or offset.
5. drawing control method according to any one of claims 1 to 3, which is characterized in that the path coordinate collection includes
Graphics path number of lines and/or the line style of type and/or actual situation line and/or lines coordinate data.
6. drawing control method according to any one of claims 1 to 3, which is characterized in that the drawing control method is also
Include:
Feedback display step: when the PLC controls the drawing movement mechanism progress interpolation drawing, current drawing coordinate is real
When feed back to the HMI and shown.
7. a kind of drawing control system characterized by comprising
CAD diagram paper file pretreatment unit, for executing CAD diagram paper file pre-treatment step, by original CAD diagram paper file and in advance
If PLC control parameter is converted to the first cad file of format；
HMI, for executing HMI sending step, the HMI parses to obtain the default PLC control according to first cad file
Parameter and path coordinate collection, and sent out the default PLC control parameter and the path coordinate collection according to specific HMI-PLC agreement
It send to PLC；
Image-drawing unit, for executing drawing step, the PLC is according to the default PLC control parameter and the path coordinate collection
It controls drawing movement mechanism and carries out interpolation drawing.
8. drawing control system according to claim 7, which is characterized in that the CAD diagram paper file pretreatment unit packet
It includes:
CAD diagram paper file data extraction module, for being gone forward side by side walking along the street diameter according to the original CAD diagram paper file extraction document data
Planning is to obtain the path coordinate collection；
Conversion module obtains the first CAD text for converting according to the path coordinate collection and the default PLC control parameter
Part.
9. drawing control system according to claim 7, which is characterized in that
The running parameter of the PLC is arranged according to the default PLC control parameter by the PLC；
The PLC generates final path coordinate according to the default PLC control parameter, the path coordinate collection and interpolation algorithm
Collection carries out interpolation drawing to control drawing movement mechanism.
10. drawing control system according to any one of claims 7 to 9, which is characterized in that the drawing control system is also
Include:
Feedback display unit, for executing feedback display step, the PLC controls the drawing movement mechanism and carries out interpolation drawing
When, current drawing coordinate Real-time Feedback to the HMI is shown.
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