CN107991979A - A kind of array scan-type control method - Google Patents
A kind of array scan-type control method Download PDFInfo
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- CN107991979A CN107991979A CN201711143642.7A CN201711143642A CN107991979A CN 107991979 A CN107991979 A CN 107991979A CN 201711143642 A CN201711143642 A CN 201711143642A CN 107991979 A CN107991979 A CN 107991979A
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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
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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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
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
Abstract
The invention discloses a kind of array scan-type control method, for the key variables of each control object：Whether input variable, output variable and run-time variable, establish corresponding array respectively, store above-mentioned variable, and establish condition code for each control object, changed by the key variables of condition code reaction controlling object.When the key variables of condition code reaction controlling object change, corresponding control object is controlled.The present invention judges whether the operation signal of control object changes by condition code, and corresponding control program is performed when changing；It is corresponding to control program not perform then when not changing.Control method using the present invention can cause the speed of service of control system and data-handling capacity to be improved, and real-time is good, and control accuracy is high, greatly meets various industrial automatic control demands.
Description
Technical field
This application involves technical field of industrial control, more particularly to a kind of array scan-type control method, suitable for industry
The system for realizing automated control in control field using programmable controller.
Background technology
In industrial control field, substantial amounts of programmable controller be able to apply, it is necessary to processing data, variable increasingly
More, control program becomes very big.And the control method that conventional programmable controller uses is, in each scan period of system
In, from the beginning to the end, point-by-point scan round sentence by sentence, the control program of each control object is performed, to ensure control accuracy, each scanning
Cycle time is about in a few tens of milliseconds.And the transformation period of operation signal is spaced in more than second level, therefore change in operation signal
In cycle, the control program of same control object often circulates execution repeatedly, influences the ability of host process data, but real
Border operation result does not change but.
In addition, in operation signal period of change, the operation signal for all control objects hardly occur becomes
The situation of change.Therefore, it is most of during whole control to control program by recursive call, hold under current control method
OK, actually flog a dead horse to control object operation result, but take many sweep times, reduce programmable controller
The speed of service, and then influence the ability of host process data, cause that the real-time of system is poor, and control accuracy is undesirable, up to not
Required to expected.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of array scan-type control method, judged by condition code
Whether the operation signal of control object changes, and corresponding control program is performed when changing；When not changing, accordingly
Control program does not perform.Control method using the present invention can cause the speed of service of control system and data-handling capacity to be able to
Improve, real-time is good, and control accuracy is high.
Technical solution is used by realizing the object of the invention, and a kind of array scan-type control method, includes the following steps：
Each corresponding control object, establishes variable set of arrays, and variable set of arrays specifically includes input variable array, output
Variable array, run-time variable array, wherein：
The corresponding input variable of control object described in the input variable storage of array；
The corresponding output variable of control object described in the output variable storage of array；
The corresponding run-time variable of control object described in the run-time variable storage of array；
Feature array is established, the feature array includes the condition code of each control object；
Into the scan period, in present scanning cycle, the variable set of arrays of each control object is scanned, described in inspection
Whether input variable array, the output variable array and the run-time variable array change, when the input becomes
When any one of amount array, the output variable array and described run-time variable array change, then control corresponding
The described document information of object carries out accommodation, the variable number of the corresponding control object of described document information reflection after adjustment
The situation of change of group collection；
In present scanning cycle, the feature array is scanned, the institute of corresponding control object is judged according to described document information
State whether variable set of arrays changes, the changed control object of variable set of arrays is controlled；
After the cycle duration of setting, lower scan cycle is opened.
Further, after the entrance scan period, following steps are further included：
Determine whether first scan, if first scan, then a data memory module is set, each control object is corresponded to
Input variable, output variable and run-time variable be stored respectively in the corresponding input variable array, it is described output become
Measure in array and the run-time variable array, and by the input variable array, the output variable array and the fortune
Data duplication in row time variable array is into the data memory module；
If not first scan, then in present scanning cycle, scan the variable set of arrays of each control object, check institute
State whether input variable array, the output variable array and the run-time variable array change.
Further, it is described be judged as non-first scan after, further include following steps：
In present scanning cycle, by the corresponding input variable of each control object, output variable and fortune in this scan period
Row time variable is stored respectively in the corresponding input variable array, the output variable array and the run-time variable
In array, cover stored in the input variable array, the output variable array and the run-time variable array
Data, be updated with the data of this variable set of arrays to each control object；
The variable set of arrays of each control object is then scanned, checks the input variable array, the output variable
Whether array and the run-time variable array change.
Further, the variable set of arrays of each control object of scanning, checks input variable array, output variable array
It is with the whether changed particular content of run-time variable array：
In the data and the data memory module that contrast the variable set of arrays of each control object of this scan period
The corresponding data of the upper scan cycle of storage, judges whether data change.
Further, the data of the variable set of arrays of each control object for contrasting this scan period and the number
After corresponding data according to the upper scan cycle stored in memory module, following steps are further included：
By the data duplication of the variable set of arrays of each control object in this scan period to the data memory module
In, the data of the upper scan cycle wherein stored are covered, are updated with the data that this stores the data memory module.
Further, described document information is " 0 " or " 1 "；Described document information represents corresponding control object when being " 0 "
Each variable array does not change；Described document information represents in each variable array of corresponding control object at least when being " 1 "
One changes.
Further, the particular content of the condition code progress accommodation of described pair of corresponding control object is：
If the variable set of arrays of control object does not change, corresponding condition code in feature array is reset to " 0 "；
It is " 1 " by corresponding condition code set in feature array if the variable set of arrays of control object changes.
Further, before the entrance scan period, following steps are further included：
Each corresponding control object, works out corresponding control subprogram, and the control subprogram is used for corresponding control
Object processed is controlled；
Master control program is worked out, the master control program is used to scan the feature array, and calls control
Program；
Array scanning imaging system is worked out, the array scanning imaging system is used for the variable set of arrays for scanning each control object,
And the described document information of corresponding control object is changed according to scanning result.
Further, the variable set of arrays specifically includes input variable array, output variable array, intermediate variable number
Group, run-time variable array, wherein：
The corresponding input variable for controlling subprogram of the input variable storage of array control object；
The corresponding output variable for controlling subprogram of the output variable storage of array control object；
The corresponding intermediate variable for controlling subprogram of the intermediate variable storage of array control object；
The corresponding run-time variable for controlling subprogram of the run-time variable storage of array control object.
Further, the particular content being controlled to the changed control object of variable set of arrays is：
The master control program judges that the variable set of arrays of corresponding control object changes according to described document information
When, master control program calls the corresponding control subprogram of the control object, and corresponding control output information is by control
Program is calculated, and control output information is used to regulate and control the operating status of corresponding control object.
As shown from the above technical solution, control method provided by the invention, for the key variables of each control object：
Input variable, output variable and run-time variable, establish corresponding array respectively, store above-mentioned variable, and are each control
Whether object processed establishes condition code, changed by the key variables of condition code reaction controlling object.React and control when condition code
When the key variables of object processed change, corresponding control object is controlled.
Research is found, for industrial control system, optimal control model is only to occur in the operation signal of control object
Controlled it during change, control under other conditions and do not perform, can both ensure normal production requirement, while at utmost
Control system internal data treating capacity is reduced, the operation conditions of whole system is also optimal.
Corresponding to the control method of the present invention, the present invention is become by input variable array, output variable array, run time
Array toolization " operation signal of control object " is measured, is appointed in input variable array, output variable array, run-time variable array
One changes, that is, illustrates that the operation signal of control object changes, and input variable array, output variable array, fortune
Any one of row time variable array, which changes, can cause the accommodation of condition code.Condition code is essentially control pair
Whether the state encoding of elephant, the operation signal directly perceived for reflecting control object change.Corresponding control object is judged by condition code
Operation signal whether change, this process is decoded equivalent to condition code, and each control object is obtained according to decoding result
Status information, and control only is oriented to the control object that operation signal changes, it both ensure that normal production requirement,
The data processing amount of the control method is at utmost reduced at the same time.
By one or more technical solution of the present invention, the invention has the advantages that or advantage：
Array scan-type control method provided by the invention, in application, being in a scan period in control system
System is substantially carried out simple data comparison and modification, and only control program is performed a little, and the time that control program takes is seldom, solution
The problem of program circulates, the holding time that reruns is long is controlled in existing control method of having determined so that the operation speed of control system
Degree and disposal ability are improved, and real-time is good, and control accuracy is high, and control function is strong.
Embodiment
In order to make the application the technical staff in the technical field be more clearly understood that the application, below by specific reality
Example is applied to be described in detail technical scheme.
In embodiments of the present invention, which is applied to industrial control system, master controller is adopted
With PLC controllers, control object includes 3 motors, and each control object is each equipped with corresponding control subprogram, PLC controls
Device is configured with master control program, and array scanning imaging system is write in PLC controller, and the particular content of procedure above is maturation
The prior art, details are not described herein again.
The array scan-type control method comprises the following steps that：
Each corresponding control object：Motor A, motor B, motor C, establish variable set of arrays, are then needed in the present embodiment
3 variable set of arrays are established, are respectively variable set of arrays A, variable set of arrays B, variable set of arrays C, each variable set of arrays is wrapped
Input variable array IM, output variable array OM, intermediate variable array FM, run-time variable array TM are included, wherein：
The input variable of the corresponding control subprogram of input variable array IM storages control object, by multiple input variable i m
Form (im1, im2, im3 ...), these input variables im is that corresponding control object is proprietary；
The output variable of the corresponding control subprogram of output variable array OM storages control object, by multiple output variable om
Form (om1, om2, om3 ...), these output variables om is that corresponding control object is proprietary, and output variable om constitutes correspondence
The control output information of control object；
The intermediate variable of the corresponding control subprogram of intermediate variable array FM storages control object, by multiple intermediate variable fm
Form (fm1, fm2, fm3 ...), these intermediate variables fm is that corresponding control object is proprietary；
The run-time variable of the corresponding control subprogram of run-time variable array TM storages control object, by multiple fortune
Row time variable tm forms (tm1, tm2, tm3...), these run-time variables tm is that corresponding control object is proprietary.
Feature array DM is established, feature array DM includes condition code dm1, dm2, dm3 of each control object, and dm1 is motor A
Condition code, dm2 be motor B condition code, dm3 be motor C condition code.
Device readily identified " 0 ", " 1 " code, condition code dm represent corresponding control pair to condition code dm in order to control when being " 0 "
Each variable array of elephant does not change, i.e., the variable set of arrays of corresponding control object does not change；Condition code dm is
Represent that at least one changes in each variable array of corresponding control object when " 1 ", i.e., the variable of corresponding control object
Set of arrays changes.
When initial, above-mentioned input variable array IM, output variable array OM, intermediate variable array FM, run-time variable
Data in array TM and feature array DM are 0.
After starting production, system starts to scan, and array scanning imaging system includes IM, OM, FM, TM array scanning imaging system, is based on
Index processing operation, with compare, exclusive or, displacement, the function such as callings, scanning input variable array IM, output variable number respectively
Variable data in group OM, intermediate variable array FM, run-time variable array TM, and according to scanning result write-in characteristic array
The condition code of DM.
The specific scans content of single control object is as follows：
1. the scanning of IM arrays scanning imaging system corresponds to the input variable array IM of first control object motor A, check defeated
Enter whether variable array IM changes；Specific method is as follows：
A) in scan period Ti+1During beginning, i is positive integer, carries out the data update of variable set of arrays first, specifically,
By this scan period Ti+1Input variable, output variable, intermediate variable and the run-time variable of the control subprogram of middle motor A
It is stored respectively in corresponding input variable array IM, output variable array OM, intermediate variable array FM and run-time variable number
In group TM, scan cycle T in coveringiThe data of memory storage, are updated with the data of this variable set of arrays to motor A；
B) value (this scan period T of input variable array IM is comparedi+1Value) with register in store upper one scan week
Phase TiThe value of input variable array IM, if value is identical, represents that input variable array IM does not change；If value is different,
Represent that input variable array IM is changed；
C) finally the value of register is updated, specifically, by this scan period Ti+1The input variable number of middle motor A
The data duplication of group IM is into register, scan cycle T in coveringiThe corresponding data of middle storage, deposits register with this
The data of storage are updated.Above step order, it can be ensured that carry out data compare when register in store be always on
The value of scan cycle.
Above-mentioned steps are the content of system operation the latter normal scan period, after the scan period is entered, it is necessary first to
Determine whether first scan, if present scan is the first scan of system, that is, preliminary sweep T0, then a number is set first
According to memory module, data memory module uses register in the present embodiment, which can store the institute of all control objects
There are data, input variable, output variable, intermediate variable and the run-time variable of the control subprogram of motor A are stored respectively
In corresponding input variable array IM, output variable array OM, intermediate variable array FM and run-time variable array TM；
Then by above-mentioned data duplication into register.When initial, variable array IM, output variable array OM, intermediate variable array FM
It is 0 with the value in run-time variable array TM and register, preliminary sweep T0Substantially only carry out simple assignment behaviour
Make.By preliminary sweep T0After can according to above-mentioned steps carry out normal scan, that is to say, that if judging, present scan is not
The first scan of system, i.e., be scanned according to above-mentioned steps.
2. being same as above, the scanning of OM arrays scanning imaging system corresponds to the output variable array OM of first control object motor A, inspection
Look into whether output variable array OM changes；
3. being same as above, the scanning of FM arrays scanning imaging system corresponds to the intermediate variable array FM of first control object motor A, inspection
Look into whether intermediate variable array FM changes；
4. being same as above, the scanning of TM arrays scanning imaging system corresponds to the run-time variable array of first control object motor A
TM, checks whether run-time variable array TM changes；
5. if corresponding to the input variable array IM of first control object motor A, output variable array OM, centre
Variable array FM, run-time variable array TM do not change all, represent that the variable set of arrays of the control object does not have
Change, corresponding condition code dm1 in feature array DM is reset to " 0 "；
If input variable array IM, output variable array OM, intermediate variable array FM, run-time variable array TM
There is any one to change, represent that the variable set of arrays of the control object changes, corresponding feature in feature array DM
Code dm1 set is " 1 ", the situation of change of the variable set of arrays of the corresponding control object of condition code reflection after adjustment.
The scans content of other two control object, scanning correspond to second, the 3rd control object
Whether input variable array IM, output variable array OM, intermediate variable array FM, run-time variable array TM change,
By the operation that corresponding condition code dm2, dm3 in feature array DM is reset to " 0 " or set is " 1 ".
Master control program reads the numerical value of the condition code dm1 for the array of data DM for corresponding to first control object motor A.
The variable set of arrays of first control object motor A of expression does not change when the numerical value of dm1 is " 0 ", and (operation signal does not change
Become), the corresponding control subprograms of first control object motor A are not called by master control program, corresponding control output information
Remain unchanged；Represent that the variable set of arrays of first control object motor A changes (operation signal when the numerical value of dm1 is " 1 "
Change), the corresponding control subprograms of first control object motor A are called by master control program, corresponding control output information
It is calculated by the control subprogram, control output information is used to regulate and control the operating status of motor A.
Similarly, master control program reads the feature for the array of data DM for corresponding to second, the 3rd control object motor A
The numerical value of code dm2, dm3, the numerical value of condition code represent that the variable set of arrays of corresponding control object does not become when being " 0 "
Change, the corresponding control subprogram of the control object is not called by master control program, and corresponding control output information remains unchanged；It is special
The numerical value of sign code represents that the variable set of arrays of corresponding control object changes when being " 1 ", the corresponding control of the control object
Subprogram is called by master control program, and corresponding control output information is calculated by the control subprogram, controls output information
For regulating and controlling the operating status of control object.
After the cycle duration of setting, lower scan cycle, repeated variable set of arrays data update, data ratio are opened
Compared with the renewal of, register data, condition code adjustment, determine whether to call control subprogram.
For technical grade controller, the control subprogram of each control object is more complicated compared to other program biggers, because
It is also larger that system processing memory headroom is taken during this operation.Using the above-mentioned matrix-scanning-type control method of the embodiment of the present invention
Afterwards, only array scanning imaging system is performing within each scan period of controller, substantial amounts of to control subprogram not perform at the same time,
Therefore the speed of service of host is fast, real-time is good, control accuracy is high.The matrix-scanning-type control method can reduce whole control journey
The run time of sequence, the speed of service for improving controller and the ability for handling data, real-time is good, and control accuracy is high, greatly
Meet various industrial automatic control demands.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make these embodiments other change and modification.So appended claims are intended to be construed to wrap
Include preferred embodiment and fall into all change and modification of the application scope.
Obviously, those skilled in the art can carry out the application essence of the various modification and variations without departing from the application
God and scope.In this way, if these modifications and variations of the application belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising including these modification and variations.
Claims (10)
1. a kind of array scan-type control method, it is characterised in that include the following steps：
Each corresponding control object, establishes variable set of arrays, variable set of arrays specifically includes input variable array, output variable
Array, run-time variable array, wherein：
The corresponding input variable of control object described in the input variable storage of array；
The corresponding output variable of control object described in the output variable storage of array；
The corresponding run-time variable of control object described in the run-time variable storage of array；
Feature array is established, the feature array includes the condition code of each control object；
Into the scan period, in present scanning cycle, the variable set of arrays of each control object is scanned, checks the input
Whether variable array, the output variable array and the run-time variable array change, when the input variable number
When any one of group, the output variable array and described run-time variable array change, then to corresponding control object
Described document information carry out accommodation, the variable set of arrays of the corresponding control object of described document information reflection after adjustment
Situation of change；
In present scanning cycle, the feature array is scanned, the change of corresponding control object is judged according to described document information
Whether amount set of arrays changes, and the changed control object of variable set of arrays is controlled；
After the cycle duration of setting, lower scan cycle is opened.
2. array scan-type control method as claimed in claim 1, it is characterised in that：After the entrance scan period, also wrap
Include following steps：
Determine whether first scan, if first scan, then a data memory module is set, each control object is corresponding defeated
Enter variable, output variable and run-time variable and be stored respectively in the corresponding input variable array, the output variable number
In group and the run-time variable array, and during by the input variable array, the output variable array and the operation
Between data duplication in variable array into the data memory module；
If not first scan, then in present scanning cycle, scan the variable set of arrays of each control object, check described defeated
Enter whether variable array, the output variable array and the run-time variable array change.
3. array scan-type control method as claimed in claim 2, it is characterised in that：It is described be judged as non-first scan after,
Further include following steps：
In present scanning cycle, during by the corresponding input variable of each control object in this scan period, output variable and operation
Between variable be stored respectively in the corresponding input variable array, the output variable array and the run-time variable array
In, cover number stored in the input variable array, the output variable array and the run-time variable array
According to being updated with the data of this variable set of arrays to each control object；
The variable set of arrays of each control object is then scanned, checks the input variable array, the output variable array
Whether change with the run-time variable array.
4. array scan-type control method as claimed in claim 3, it is characterised in that：The variable of each control object of scanning
Set of arrays, checks input variable array, output variable array and the whether changed particular content of run-time variable array
For：
The data of the variable set of arrays of each control object of this scan period are contrasted with being stored in the data memory module
Upper scan cycle corresponding data, judge whether data change.
5. array scan-type control method as claimed in claim 4, it is characterised in that：Each control for contrasting this scan period
The data of the variable set of arrays of object processed and the corresponding data of the upper scan cycle stored in the data memory module
Afterwards, following steps are further included：
By the data duplication of the variable set of arrays of each control object in this scan period into the data memory module, cover
The data of the upper scan cycle wherein stored are covered, are updated with the data that this stores the data memory module.
6. array scan-type control method as claimed in claim 1, it is characterised in that：Described document information is " 0 " or " 1 "；
Described document information represents that each variable array of corresponding control object does not change when being " 0 "；When described document information is " 1 "
Represent that at least one changes in each variable array of corresponding control object.
7. array scan-type control method as claimed in claim 6, it is characterised in that：The feature of described pair of corresponding control object
Code carry out accommodation particular content be：
If the variable set of arrays of control object does not change, corresponding condition code in feature array is reset to " 0 "；
It is " 1 " by corresponding condition code set in feature array if the variable set of arrays of control object changes.
8. array scan-type control method as claimed in claim 1, it is characterised in that：Before the entrance scan period, also wrap
Include following steps：
Each corresponding control object, works out corresponding control subprogram, and the control subprogram is used for corresponding control pair
As being controlled；
Master control program is worked out, the master control program is used to scan the feature array, and calls the control subprogram；
Array scanning imaging system is worked out, the array scanning imaging system is used for the variable set of arrays for scanning each control object, and root
The described document information of corresponding control object is changed according to scanning result.
9. array scan-type control method as claimed in claim 8, it is characterised in that：The variable set of arrays specifically includes defeated
Enter variable array, output variable array, intermediate variable array, run-time variable array, wherein：
The corresponding input variable for controlling subprogram of the input variable storage of array control object；
The corresponding output variable for controlling subprogram of the output variable storage of array control object；
The corresponding intermediate variable for controlling subprogram of the intermediate variable storage of array control object；
The corresponding run-time variable for controlling subprogram of the run-time variable storage of array control object.
10. array scan-type control method as claimed in claim 8, it is characterised in that：It is changed to variable set of arrays
The particular content that control object is controlled is：
It is main when the master control program judges that the variable set of arrays of corresponding control object changes according to described document information
The corresponding control subprogram of the routine call control object is controlled, corresponding control output information is by the control subprogram meter
Draw, control output information is used to regulate and control the operating status of corresponding control object.
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| US20110304370A1 (en) * | 2010-06-09 | 2011-12-15 | International Business Machines Corporation | Programmable control clock circuit including scan mode |
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