CN108614515A - It is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method - Google Patents
It is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method Download PDFInfo
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- CN108614515A CN108614515A CN201810628722.XA CN201810628722A CN108614515A CN 108614515 A CN108614515 A CN 108614515A CN 201810628722 A CN201810628722 A CN 201810628722A CN 108614515 A CN108614515 A CN 108614515A
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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
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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Abstract
The invention discloses a kind of conversion methods of PLC ladder diagrams based on logistic production line control to instruction catalogue, including：Step S1：Doubly linked list will be used to store ladder diagram information, doubly linked list is taken out into vertex information and arc nodal information in AOV figures, and be mapped to AOV figures；Step S2：It is quickly scanned using ladder to AOV figure construction logic trees；Step S3：It is traversed after carrying out deletion merging to the logical node of logic tree, generates instruction catalogue；Step S4：Export described instruction table.The present invention stores ladder diagram pel using doubly linked list, convenient for ladder diagram is mapped as AOV figures, it is quickly scanned using ladder to AOV figure construction logic trees, it reduces and repeats, accelerate sweep speed, improve transformation efficiency, before traversing logic tree, logical node is deleted, AOV figures are carried out to simplify processing, sweep speed can be further speeded up.
Description
Technical field
The present invention relates to PLC technology fields, are that a kind of PLC ladder diagrams controlled based on logistic production line are arrived specifically
The conversion method of instruction catalogue.
Background technology
Important component in logistic production line industrial production, logistic production line have usually adopted PLC (programmable controller)
It is controlled, usually there are five types of language by PLC, and wherein ladder diagram and instruction catalogue is most common bilingual.PLC is generating target
Before code is executed to logistic production line, completion ladder diagram is needed to be changed to instruction catalogue standard.It often encounters big and complicated trapezoidal
When figure program, transfer efficiency is low, and program compiling delay influences the real-time of control.
Invention content
The purpose of the present invention is to provide a kind of PLC ladder diagrams based on logistic production line control to the conversion side of instruction catalogue
Method, when being converted to instruction catalogue for solving ladder diagram complicated in the prior art, transfer efficiency is low, and the program delay that makes a variation is asked
Topic.
The present invention is solved the above problems by following technical proposals：
It is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method, including：
Step S1：Ladder diagram is mapped to AOV figures；
Step S2：According to the AOV figures construction logic tree；
Step S3：The logic tree is traversed, instruction catalogue is generated；
Step S4：Export described instruction table.
Preferably, the step S1 is specifically included：
Step S11：Doubly linked list for recording the ladder diagram information in editing process is established, in the editing process
Ladder diagram information includes the relationship between the row being made of pel and row and row；
Step S12：Determine that vertex information, the vertex information include vertex number, vertex position, vertex number, vertex
Arc head, vertex arc tail, vertex type and link information；
Step S13：Determine the direct precursor and immediate successor on each vertex；
Step S14：The direct precursor and immediate successor on the vertex, vertex that are determined by step S13 build complete AOV figures.
Preferably, the doubly linked list includes A doubly linked lists and B doubly linked lists, and the A doubly linked lists are trapezoidal for storing
Pel in figure per a line, the B doubly linked lists are used to store the relationship between ladder diagram row and row.
Preferably, the A doubly linked lists include basic unit for storing ladder diagram pel and for will be substantially single
The predecessor pointers and rear-guard pointer that member connects.
Preferably, the B doubly linked lists include upward pointer, downward pointer and pointer, the pointer to the right are used for the right
The basic unit in the A doubly linked lists is linked, the upward pointer, downward pointer are between different B doubly linked lists
Link.
Preferably, the step S12 is specifically included：The pel of ladder diagram is determined as vertex, the link between pel
Line segment regards arc as, scans ladder diagram successively according to sequence from left to right, from top to bottom, you can to determine vertex information.
Preferably, the step S13 specifically include determined successively according to vertex number each vertex direct precursor and
The step of immediate successor, the direct precursor and immediate successor that determine each vertex includes：
Step A1：The actual situation for first judging current vertex then jumps to step A2 if it is real vertex；If it is empty summit, then
Jump to step A3；
Step A2：Stop scanning, determines that current vertex is direct precursor, jump to step A4；
Step A3：It scans to the left, if finding real vertex, which is the direct precursor of current vertex；If met
Then stop scanning to parallel branch or node, determines that current vertex is direct precursor, jump to step A5；
Step A4：It scans to the right, finds next real vertex, then this real vertex is the immediate successor of current vertex；
Step A5：It scans to the right, until finding real vertex, then this real vertex is the immediate successor of current vertex.
Preferably, the step S2 is specifically included：
Step B1：Vertex number is assigned to variable, by for searching loops vertex, obtains in-degree of vertex；
Step B2：The descendant node for doing for searching loops vertex again establishes the single linked list on a vertex；
Step B3：The single linked list for establishing each vertex successively according to the method for step B2 establishes the adjacency list of ladder diagram；
Step B4：Vertex number is assigned to variable, by for searching loop adjacency lists, obtains the out-degree information on vertex；
Step B5：It is quickly scanned using ladder, to AOV figure construction logic trees.
Preferably, the step B5 is specifically included：
It using the empty summit that in-degree is zero as starting point, from left to right scans, if encountering branch, first scans backward directly
Connected branch, the downward branch of returning branch spot scan after scanning is completed, after scanning is completed returning branch spot scan to
On branch, the tree construction of first ladder is established after the completion of scanning；
The scanning for repeating different ladders finally builds a tree construction.
Preferably, the step S3 is specifically included：
Each logical node on decision logic tree successively, if the type of logical node is identical as his father's node type,
Then by the child nodes of the logical node directly additional child nodes for its father node, and delete the logical node；
Using for cyclic access root nodes, every stalk tree of root node is first traversed according to order from left to right, if time
It goes through to child node, judges that the corresponding element of child node is input or output, determine whether the of father node again if input
Otherwise one child node, generates and sentence or or sentence if so, generating LD sentences or LDN sentences；If corresponding element
Part is output, then generates OUT statement.
Compared with prior art, the present invention haing the following advantages and advantageous effect：
(1) quickly scanning is to AOV figure construction logic trees using ladder by the present invention, and the empty summit that in-degree is zero is as starting point
Node, that is, busbar start from left to right to scan, if encountering branch, first scan the branch being connected directly backward, scanning complete with
The downward or upward branch of returning branch spot scan afterwards establishes the tree construction of first ladder after the completion of scanning.It repeats
Finally one tree construction of structure, reduction repeat for the scanning of different ladders, accelerate sweep speed, improve transformation efficiency.
(2) ladder diagram for being suitble to the doubly linked list storage editing process of dynamic editor is established, ladder diagram can be each schemed
In member storage to the data of doubly linked list, context storage to pointer field, the data exchange between row and row is also by two-way
Chained list is chained up, and doubly linked list can be taken out to vertex information and arc node in AOV figures using the method for programming believes
Breath has crown point, the number on tail vertex, the row where vertex, row and the information such as vertex arc head and arc tail in the description of class,
Therefore can be by from left to right, the information such as scan vertex number from top to bottom, determination and the vertex for obtaining vertex number be direct
The relevant information of forerunner and immediate successor, so that it may to build AOV figures.
(3) before due to traversal logic tree, logical node is deleted, AOV figures are carried out to simplify processing, it can be with
Further speed up sweep speed.
Description of the drawings
Fig. 1 is the structure chart of doubly linked list in the present invention；
Fig. 2 is the example ladder diagram that the specific embodiment of the invention uses；
Fig. 3 is the AOV figures that ladder diagram maps in Fig. 2；
Fig. 4 is the logic tree built in the present invention.
Specific implementation mode
The present invention is described in further detail with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1：
It is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method, including：
Mapping of the ladder diagram to AOV figures is established, ladder diagram is as shown in Fig. 2, initially set up for storing in editing process
The doubly linked list of ladder diagram, ladder diagram are the processes of dynamic editor, need the operations such as to change and search, and doubly linked list is suitble to move
State editor.As shown in Figure 1, each node of doubly linked list has heir pointer and predecessor pointers, and heir pointer and predecessor pointers are each
From the chained list for building the endless-chain of oneself.Therefore, can will scheme in each pel storage to the data of doubly linked list of ladder diagram
The context of member is stored to pointer field, and often row ladder diagram just stores in this way, the data exchange between ladder diagram row and row
Also it can be chained up by doubly linked list；Secondly, it can be taken out in AOV figures from doubly linked list using the method for programming
Vertex information and arc nodal information have crown point, the number on tail vertex, the row where vertex, row and top in the description of class
The relevant informations such as scratch start head and arc tail, therefore can be by the starting point from program from left to right, scan vertex number from top to bottom
Etc. information；Again, the direct precursor and immediate successor for determining vertex, first determine whether the actual situation on vertex, if it is reality in a scan
Vertex then stops scanning, which is direct precursor, is scanned to the left if it is empty summit continuation, until finding real vertex,
Stop scanning if encountering parallel branch or node, which is direct precursor.The judgement of immediate successor, if working as sinciput
Point is real vertex, and there are physical nodes for scanning to the right, then this vertex is immediate successor：Current vertex is empty summit, and right direction is looked into
Effective vertex is found, then this effective vertex is the immediate successor of current vertex；Finally, it is scanned through to obtain the determination of vertex number
With the relevant information of vertex direct precursor and immediate successor, so that it may to build AOV figures, as shown in Figure 3.
According to AOV figure construction logic trees, the AOV that adjacency list storage ladder diagram is mapped to is used to scheme first：By vertex number
It is assigned to variable, by for searching loops vertex, obtains in-degree of vertex, then do the descendant node on for searching loops vertex,
The single linked list on a vertex is established, next repeats the single linked list for establishing each vertex, establishes the adjacency list of ladder diagram, finally
A for is again to recycle to obtain the out-degree information on vertex；Secondly, it is quickly scanned using ladder to AOV figure construction logic trees：According to
The characteristics of trapezoid figure program, is quickly scanned using ladder, is from left to right scanned since the node of busbar, if encountering branch, first
The branch being connected directly backward is scanned, the downward or upward branch of returning branch spot scan after scanning is completed, scanning is completed
The tree construction for establishing first ladder afterwards, the scanning for repeating different ladders finally builds a logical tree structure, such as Fig. 4 institutes
Show, compares series parallel scan, process is simple, and repetitive rate is low.
It is simplified to the logical node of logic tree and traverse logic tree, output order table：Successively each of on decision logic tree
Logical node, it is if the type of logical node is identical as his father's node type, the child nodes of logical node are directly additional
For the child nodes of its father node, and delete the logical node；Using for cyclic access root nodes, according to time from left to right
Sequence first traverses every stalk tree of root node, if traversing child node, judges that the corresponding element of child node is input or exports,
Determine whether first child node of father node again if input, if so, LD sentences or LDN sentences are generated, it is otherwise, raw
At with sentence or or sentence；If counter element is output, OUT statement is generated, output order table is as follows：
LD I0.0
A I0.1
LD I0.5
AN I0.6
OLD
O I1.1
LD I0.2
A I0.3
LD I0.7
A I1.0
OLD
ALD
AN I0.4
=Q0.0
Wherein, LD, instruction fetch indicate that the normal opened contact being connected with an inlet highway instruction, i.e. normal opened contact logic are transported
Count the beginning；
LDN negates instruction, indicates the normally closed contact being connected with an inlet highway instruction, i.e. normally closed contact logical operation
Starting；
A is used for the series connection of single normal opened contact with instruction；
AN is used for the series connection of single normally closed contact with non-instruction；
O, or instruction, are used for the parallel connection of single normal opened contact；
OLD, series circuit block are connected in parallel instruction, the instruction of no operation target；
ALD, parallel circuit block are connected in series with instruction, the instruction of no operation target；
ON or non-instructions are used for the parallel connection of single normally closed contact.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will be fallen in principle disclosed in the present application
Within scope and spirit.
Claims (10)
1. it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method, which is characterized in that including：
Step S1：Ladder diagram is mapped to AOV figures；
Step S2：According to the AOV figures construction logic tree；
Step S3：The logic tree is traversed, instruction catalogue is generated；
Step S4：Export described instruction table.
2. it is according to claim 1 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the step S1 is specifically included：
Step S11：The doubly linked list for recording the ladder diagram information in editing process is established, it is trapezoidal in the editing process
Figure information includes the relationship between the row being made of pel and row and row；
Step S12：Determine vertex information, the vertex information include vertex number, vertex position, vertex number, vertex arc head,
Vertex arc tail, vertex type and link information；
Step S13：Determine the direct precursor and immediate successor on each vertex；
Step S14：The direct precursor and immediate successor on the vertex, vertex that are determined by step S13 build complete AOV figures.
3. it is according to claim 2 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the doubly linked list includes A doubly linked lists and B doubly linked lists, the A doubly linked lists are for storing in ladder diagram
Pel per a line, the B doubly linked lists are used to store the relationship between ladder diagram row and row.
4. it is according to claim 3 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the A doubly linked lists include basic unit for storing ladder diagram pel and for connecting basic unit
Pick up the predecessor pointers come and rear-guard pointer.
5. it is according to claim 4 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the B doubly linked lists include upward pointer, downward pointer and pointer, the pointer to the right are used to link to the right
Basic unit in the A doubly linked lists, the upward pointer, downward pointer are for the link between different B doubly linked lists.
6. it is according to claim 2 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the step S12 is specifically included：The pel of ladder diagram is determined as vertex, the link line segment between pel
Regard arc as, scans ladder diagram successively according to sequence from left to right, from top to bottom, you can to determine vertex information.
7. it is according to claim 6 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the step S13 specifically include determined successively according to vertex number each vertex direct precursor and directly
Subsequent, the step of direct precursor and immediate successor for determining each vertex, includes：
Step A1：The actual situation for first judging current vertex then jumps to step A2 if it is real vertex；If it is empty summit, then jump to
Step A3；
Step A2：Stop scanning, determines that current vertex is direct precursor, jump to step A4；
Step A3：It scans to the left, if finding real vertex, which is the direct precursor of current vertex；If encountered simultaneously
Connection branch or node then stop scanning, and determine that current vertex is direct precursor, jump to step A5；
Step A4：It scans to the right, finds next real vertex, then this real vertex is the immediate successor of current vertex；
Step A5：It scans to the right, until finding real vertex, then this real vertex is the immediate successor of current vertex.
8. it is according to any one of claims 1-7 it is a kind of based on logistic production line control PLC ladder diagrams to instruct
The conversion method of table, which is characterized in that the step S2 is specifically included：
Step B1：Vertex number is assigned to variable, by for searching loops vertex, obtains in-degree of vertex；
Step B2：The descendant node for doing for searching loops vertex again establishes the single linked list on a vertex；
Step B3：The single linked list for establishing each vertex successively according to the method for step B2 establishes the adjacency list of ladder diagram；
Step B4：Vertex number is assigned to variable, by for searching loop adjacency lists, obtains the out-degree information on vertex；
Step B5：It is quickly scanned using ladder, to AOV figure construction logic trees.
9. it is according to claim 8 it is a kind of based on logistic production line control PLC ladder diagrams to instruction catalogue conversion method,
It is characterized in that, the step B5 is specifically included：
It using the empty summit that in-degree is zero as starting point, from left to right scans, if encountering branch, first scans and be connected directly backward
Branch, the downward branch of returning branch spot scan after scanning is completed, returning branch spot scan is upward after scanning is completed
Branch establishes the tree construction of first ladder after the completion of scanning；
The scanning for repeating different ladders finally builds a tree construction.
10. a kind of PLC ladder diagrams based on logistic production line control according to claim 9 are to the conversion side of instruction catalogue
Method, which is characterized in that the step S3 is specifically included：
Each logical node on decision logic tree successively will if the type of logical node is identical as his father's node type
The child nodes of logical node are directly additional to be the child nodes of its father node, and deletes the logical node；
Using for cyclic access root nodes, every stalk tree of root node is first traversed according to order from left to right, if traversed
Child node judges that the corresponding element of child node is input or output, determines whether first of father node again if input
Otherwise child node, generates and sentence or or sentence if so, generating LD sentences or LDN sentences；If counter element is
Output, then generate OUT statement.
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| CN109814842A (en) * | 2018-12-26 | 2019-05-28 | 施耐德万高（天津）电气设备有限公司 | A kind of tree-shaped logic software design method of double power supply automatic transfer switch |
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| CN109814842B (en) * | 2018-12-26 | 2021-12-17 | 施耐德万高（天津）电气设备有限公司 | Tree-type logic software design method for dual-power automatic transfer switch |
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