CN104460489A - Method for converting PLC instruction list into ladder diagram based on generator set controller - Google Patents
Method for converting PLC instruction list into ladder diagram based on generator set controller Download PDFInfo
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- CN104460489A CN104460489A CN201410634281.6A CN201410634281A CN104460489A CN 104460489 A CN104460489 A CN 104460489A CN 201410634281 A CN201410634281 A CN 201410634281A CN 104460489 A CN104460489 A CN 104460489A
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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
- G05B19/056—Programming the PLC
Abstract
The invention provides a method for converting a PLC instruction list into a ladder diagram based on a generator set controller. The method comprises the steps of (1) constructing an intermediate tree according to the PLC instruction list, (2) traversing the intermediate tree, and (3) outputting the ladder diagram generated in the step (2). According to method for converting the PLC instruction list into the ladder diagram, errors and redundancies can be automatically detected, the intermediate tree structure is generated through the PLC instruction list, and then the ladder diagram is generated through the intermediate tree.
Description
Technical field
The present invention relates to a kind of method that instruction list turns ladder diagram, specifically, relate to a kind of method that PLC instruction list based on generator set controller turns ladder diagram.
Background technology
The programming language of PLC generally adopts trapezoid figure language (LD), repertoire la nguage (IL), functional module language (FBD), order functional sequence graph-based language (SFC) and structured text language (ST) five kinds, but, in the process used, sometimes need to transfer existing instruction list to ladder diagram, common method can not error correction in the process turning ladder diagram, and easily occurs translation error or redundancy.
In order to solve above Problems existing, people are seeking a kind of desirable technical solution always.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide one and be easy to realize, the PLC ladder diagram based on generator set controller that automatically can detect mistake and redundancy turns the method for instruction list.
To achieve these goals, the technical solution adopted in the present invention is: a kind of PLC instruction list based on generator set controller turns the method for ladder diagram, comprises the following steps:
Step 1: build intermediary tree according to PLC instruction list:
Define a stack and preserve node, progressively translate the instruction of the every a line of PLC instruction list from top to bottom;
If a LD or LDNOT instruction, a newly-built leaf node X, and newly-built leaf node X is advanced stack;
If b encounters AND or ANDNOT instruction, generate a leaf node X, then judge the type of stack top node; If series connection node, this leaf node X is set to the child node of stack top node; If stack top node is leaf node or sys node, then a newly-built series connection node S, be the child node of newly-built series connection node S by the leaf node X of generation and stack top Node configuration, stack top node is popped, and newly-built series connection node S pushes on;
If c encounters OR and ORNOT instruction, generate a leaf node X, then judge the type of stack top node; If sys node, directly the leaf node X of generation is set to the child node of stack top node; If leaf node or series connection node, a newly-built sys node P, be the child node of this sys node P by leaf node X and stack top Node configuration, stack top node is popped, and this sys node P pushes on;
If d encounters ANDLD instruction, a newly-built series connection node S, pops the first two node of stack, and is the child node of this series connection node S by these two Node configurations, and this series connection node S pushes on;
If e encounters ORLD instruction, a newly-built sys node P, pops the first two node of stack, and is the child node of this sys node P by these two Node configurations, and this sys node P pushes on;
F, encounter OUT instruction, newly-built output node;
G, encounter END instruction, then terminate, intermediary tree has generated;
Wherein, the node of described intermediary tree comprises leaf node X and relation node, and described relation node is the father node of ladder diagram logic node, comprises series connection node S and sys node P; Described leaf node X is logic node switching value in ladder diagram; Each leaf node X must have individual relation father node, if the child node of relation node is relation node, relator node can not be identical with father node type.
Step 2: traversal intermediary tree:
A, traversal intermediary tree, if relation node, so continue recurrence and go down, until traverse leaf node X, be then depicted as a logic node of ladder diagram;
B, traverse next leaf node X, this leaf node X and a upper node have a common relation node, judge the type of this relation node, if series connection node S is then plotted in after the X-direction of a node, if sys node P is then plotted in below a node Y direction;
C, travel through all leaf node X of intermediary tree successively, according to step a, step b each leaf node X in intermediary tree is depicted as a logic node in ladder diagram.
Step 3: export the ladder diagram generated in step 2.
Hinge structure of the present invention has outstanding substantive distinguishing features and marked improvement, specifically, present approach provides a kind of method being generated ladder diagram by PLC instruction list, can automatically detect mistake and redundancy, generate intermediary tree structure by PLC ladder diagram, then generate instruction list by intermediary tree.
Accompanying drawing explanation
Fig. 1 is according to the intermediary tree that the PLC instruction list adopted generates in the step e that illustrates of the inventive method.
Fig. 2 is that the inventive method illustrates the middle intermediary tree finally generated according to the PLC instruction list adopted.
Fig. 3 is that the inventive method illustrates the middle ladder diagram finally generated according to the PLC instruction list adopted.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
PLC instruction list based on generator set controller turns a method for ladder diagram, comprises the following steps:
Step 1: build intermediary tree according to PLC instruction list:
Define a stack and preserve node, progressively translate the instruction of the every a line of PLC instruction list from top to bottom;
If a LD or LDNOT instruction, a newly-built leaf node X, and newly-built leaf node X is advanced stack;
If b encounters AND or ANDNOT instruction, generate a leaf node X, then judge the type of stack top node; If series connection node, this leaf node X is set to the child node of stack top node; If stack top node is leaf node or sys node, then a newly-built series connection node S, be the child node of newly-built series connection node S by the leaf node X of generation and stack top Node configuration, stack top node is popped, and newly-built series connection node S pushes on;
If c encounters OR and ORNOT instruction, generate a leaf node X, then judge the type of stack top node; If sys node, directly the leaf node X of generation is set to the child node of stack top node; If leaf node or series connection node, a newly-built sys node P, be the child node of this sys node P by leaf node X and stack top Node configuration, stack top node is popped, and this sys node P pushes on;
If d encounters ANDLD instruction, a newly-built series connection node S, pops the first two node of stack, and is the child node of this series connection node S by these two Node configurations, and this series connection node S pushes on;
If e encounters ORLD instruction, a newly-built sys node P, pops the first two node of stack, and is the child node of this sys node P by these two Node configurations, and this sys node P pushes on;
F, encounter OUT instruction, newly-built output node;
G, encounter END instruction, then terminate, intermediary tree has generated;
Wherein, the node of described intermediary tree comprises leaf node X and relation node, and described relation node is the father node of ladder diagram logic node, comprises series connection node S and sys node P; Described leaf node X is logic node switching value in ladder diagram; Each leaf node X must have individual relation father node, if the child node of relation node is relation node, relator node can not be identical with father node type.
Step 2: traversal intermediary tree:
A, traversal intermediary tree, if relation node, so continue recurrence and go down, until traverse leaf node X, be then depicted as a logic node of ladder diagram;
B, traverse next leaf node X, this leaf node X and a upper node have a common relation node, judge the type of this relation node, if series connection node S is then plotted in after the X-direction of a node, if sys node P is then plotted in below a node Y direction;
C, travel through all leaf node X of intermediary tree successively, according to step a, step b each leaf node X in intermediary tree is depicted as a logic node in ladder diagram.
Step 3: export the ladder diagram generated in step 2.
The method turning ladder diagram to above-mentioned PLC instruction list is below made and being illustrated:
Instruction in PLC instruction list comprises following 10 kinds: LD, LDNOT, AND, ANDNOT, OR, ORNOT, ANDLD, ORLD, OUT, END.
When illustrating, intend adopting PLC instruction list as shown in the table:
LD X1
LD X2
ORNOT X3
ANDLD
OR X4
LD X5
LD X6
LD X7
OR X8
ANDLD
ORLD
OR X9
ANDLD
AND X10
OUT Fun#1
END。
Node preserved by a, a definition stack.
B, the first row " LD X1 " read in above-mentioned PLC instruction list, read LD instruction, then a newly-built leaf node X1, leaf node X1 pushes on.
C and read " LD X2 " instruction, with step b, a newly-built leaf node X2, leaf node X2 pushes on.
D, to read " ORNOT X3 ", newly-built leaf node X3.Because be ORNOT instruction, the type of stack top node be judged, i.e. the type of X2 node.Because X2 node is leaf node, so want a newly-built sys node P1, be the child node of sys node P1 by X2 node and X3 Node configuration, X2 node is popped, and sys node P1 pushes on, and now, has two nodes in stack: leaf node X1 and sys node P1.
E, read ANDLD, a newly-built series connection node S1, and be the child node of series connection node S1 by first in stack and second Node configuration, that is: leaf node X1 and sys node P1 is set to the child node of series connection node S1, leaf node X1 and sys node P1 pops, S1 node pushes on, and now only has a series connection node S1 in stack.Intermediary tree structure now as shown in Figure 1.
F, continuation reading command " OR X4 ", because be OR instruction, so the type of stack top node will be judged, because S1 is series connection node, so want a newly-built sys node P2, series connection node S1 and leaf node X4 is set to the child node of sys node P2, series connection node S1 pops, and sys node P2 pushes on.
G, reading command " LD X5 ", " LD X6 " and " LD X7 ", as step b, newly-built leaf node X5, leaf node X6 and leaf node X7, be pushed in stack successively respectively.
H, reading " OR X8 " instruction, newly-built leaf node X8, judge now stack top node type, because be leaf node X7, so want a newly-built sys node P3, be set to by leaf node X7 and leaf node X8 and the child node of interface P3, leaf node X7 pops, and sys node P3 pushes on.
I, reading " ANDLD " instruction, newly-built series connection node S2, be the child node of series connection node S2 by the node of first in stack and second Node configuration, leaf node X6 and sys node P3 pops, and series connection node S2 pushes on.Read " ORLD " instruction, a newly-built sys node P4, is set to the child node of sys node P4 by leaf node X5 and series connection node S2, leaf node X5 and series connection node S2 pops, and sys node P4 pushes on.
J, with step I until read OUT instruction, generate output node Fun#1.
K, reading END instruction, instruction list reads complete, and the intermediary tree of generation as shown in Figure 2.
L, traversal intermediary tree, if relation node, so continue recurrence and go down, until traverse leaf node, be then depicted as a logic node of ladder diagram.
M, traverse next leaf node, this leaf node and a upper node have a common relation node, judge the type of this relation node, if series connection node is then plotted in after the X-direction of a node, if sys node is then plotted in below a node Y direction.
N, travel through all leaf nodes of intermediary tree successively, according to step l, step m each leaf node in intermediary tree is depicted as a logic node in ladder diagram.
O, output generate final ladder diagram.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (1)
1. turn a method for ladder diagram based on the PLC instruction list of generator set controller, it is characterized in that, comprise the following steps:
Step 1: build intermediary tree according to PLC instruction list:
Define a stack and preserve node, progressively translate the instruction of the every a line of PLC instruction list from top to bottom;
If a LD or LDNOT instruction, a newly-built leaf node X, and newly-built leaf node X is advanced stack;
If b encounters AND or ANDNOT instruction, generate a leaf node X, then judge the type of stack top node; If series connection node, this leaf node X is set to the child node of stack top node; If stack top node is leaf node or sys node, then a newly-built series connection node S, be the child node of newly-built series connection node S by the leaf node X of generation and stack top Node configuration, stack top node is popped, and newly-built series connection node S pushes on;
If c encounters OR and ORNOT instruction, generate a leaf node X, then judge the type of stack top node; If sys node, directly the leaf node X of generation is set to the child node of stack top node; If leaf node or series connection node, a newly-built sys node P, be the child node of this sys node P by leaf node X and stack top Node configuration, stack top node is popped, and this sys node P pushes on;
If d encounters ANDLD instruction, a newly-built series connection node S, pops the first two node of stack, and is the child node of this series connection node S by these two Node configurations, and this series connection node S pushes on;
If e encounters ORLD instruction, a newly-built sys node P, pops the first two node of stack, and is the child node of this sys node P by these two Node configurations, and this sys node P pushes on;
F, encounter OUT instruction, newly-built output node;
G, encounter END instruction, then terminate, intermediary tree has generated;
Wherein, the node of described intermediary tree comprises leaf node X and relation node, and described relation node is the father node of ladder diagram logic node, comprises series connection node S and sys node P; Described leaf node X is logic node switching value in ladder diagram; Each leaf node X must have individual relation father node, if the child node of relation node is relation node, relator node can not be identical with father node type;
Step 2: traversal intermediary tree:
A, traversal intermediary tree, if relation node, so continue recurrence and go down, until traverse leaf node X, be then depicted as a logic node of ladder diagram;
B, traverse next leaf node X, this leaf node X and a upper node have a common relation node, judge the type of this relation node, if series connection node S is then plotted in after the X-direction of a node, if sys node P is then plotted in below a node Y direction;
C, travel through all leaf node X of intermediary tree successively, according to step a, step b each leaf node X in intermediary tree is depicted as a logic node in ladder diagram;
Step 3: export the ladder diagram generated in step 2.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327744A (en) * | 2020-11-20 | 2021-02-05 | 深圳市海浦蒙特科技有限公司 | Method for interconverting ladder diagram and instruction list for programmable logic controller |
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| JP2010286954A (en) * | 2009-06-10 | 2010-12-24 | Koyo Electronics Ind Co Ltd | Ladder program monitoring method |
| CN102354144A (en) * | 2011-09-06 | 2012-02-15 | 北京联合大学 | Method for converting ladder diagram into PLC (Programmable Logic Controller) program command |
| CN102508654A (en) * | 2011-10-11 | 2012-06-20 | 江苏科技大学 | Method for designing ladder diagram editing software of embedded PLC (Programmable Logic Controller) |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000276212A (en) * | 1999-03-23 | 2000-10-06 | Digital Electronics Corp | System and method for simulating control program for industrial controller and recording medium recording software therefor |
| CN101364098A (en) * | 2008-09-12 | 2009-02-11 | 南京航空航天大学 | Method and system for conversing trapezoidal pattern to be instruction catalogue program, and interpretation execution method and system |
| JP2010286954A (en) * | 2009-06-10 | 2010-12-24 | Koyo Electronics Ind Co Ltd | Ladder program monitoring method |
| CN102354144A (en) * | 2011-09-06 | 2012-02-15 | 北京联合大学 | Method for converting ladder diagram into PLC (Programmable Logic Controller) program command |
| CN102508654A (en) * | 2011-10-11 | 2012-06-20 | 江苏科技大学 | Method for designing ladder diagram editing software of embedded PLC (Programmable Logic Controller) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327744A (en) * | 2020-11-20 | 2021-02-05 | 深圳市海浦蒙特科技有限公司 | Method for interconverting ladder diagram and instruction list for programmable logic controller |
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