CN109857049A

CN109857049A - Blast furnace valve PLC logical order controls failure cause judgment method

Info

Publication number: CN109857049A
Application number: CN201711241946.7A
Authority: CN
Inventors: 吴建明; 季益龙
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2017-11-30
Filing date: 2017-11-30
Publication date: 2019-06-07
Anticipated expiration: 2037-11-30
Also published as: CN109857049B

Abstract

The present invention relates to a kind of blast furnace valve PLC logical orders to control failure cause judgment method, and the method is as follows；1) the blast furnace roof valve of PLC logical order control is able to achieve the judgement of all abnormalities; failure one be positive it is normally opened go out during but suddenly shut down; failure two is when cannot be switched on 2) quickly determine failure cause within the set range, so that failure quickly be discharged.

Description

Blast furnace valve PLC logical order controls failure cause judgment method

Technical field

The present invention relates to a kind of judgment methods, and in particular to blast furnace valve PLC logical order controls failure cause judgement side Method belongs to automatic control technology field.

Background technique

For being similar to the very multi-control apparatus such as blast furnace valve, interlock condition is complicated, once it is discontented some condition occur Foot, then entire interlocking will stop, the equipment of the movement will stop, so it is not in place some signal many times occur, causing The production accident that blast furnace stops production, exactly because interlock condition is more, in addition complicated intermediate conditions, exclusion be it is very difficult, Usually solve very simply, how to determine fault condition, in current technology, there are various methods, but mainly enumerates method, It i.e. the relevant external signal of some equipment, is shown by client independent pictures, when a failure occurs, operator is logical It crosses picture to be observed, finds the condition for being unsatisfactory for operation, this is enumerated method and is only able to display small part signal, logical for inter-interlock It cannot often enumerate completely, in addition the interlocking of logical order has " with logic ", " or logic " etc. instruction, carrying out enumeration method is very Huge data structure, so conventional method is all directed to portion of external at present.

For the country, diagnosis methods various for independent system development, but its standardized method is fewer, The judgement little for information content, respectively there is its table, it is difficult to unified and reference.

Summary of the invention

The present invention exactly for the technical problems in the prior art, provides a kind of blast furnace valve PLC logical order control Failure cause judgment method processed, the program realize that the blast furnace roof valve of PLC logical order control is able to achieve all abnormalities Judgement, that is, occur: one, normally output during but suddenly shut down；Two, when cannot be switched on；Condition is unsatisfactory for both State carry out quick diagnosis, it is last quickly to determine failure cause within the set range, so that failure quickly be discharged.

To achieve the goals above, technical scheme is as follows, a kind of blast furnace valve PLC logical order control failure Reason judgment method, which is characterized in that the method is as follows；1) the blast furnace roof valve of PLC logical order control is able to achieve institute Have a judgement of abnormality, failure one be positive it is normally opened go out during but shut down suddenly, failure two is when cannot be switched on 2) quickly Failure cause is determined within the set range, so that failure quickly be discharged.

As an improvement of the present invention, it in the step 1), is analyzed for failure one, specific steps are as follows:

For searching failure one:

Step 1: 32 bit arrays of a whole word structure are initially set up, and it is enough for general output, if not 64 double whole word structures can enough be used；

Step 2: each condition relative to output winding is pressed the rule of programmer setting, to one of array It is mapped one by one；Each position of this array in this way then corresponds to a condition element；

Step 3: each value of the array is recorded when output winding movement；The value at the moment is exactly to meet The state of each condition element of output；

Step 4: equally the value of the array is recorded when output winding abends；The value at the moment is exactly not Meet the state of each condition element of output；

Step 5: searched using the exclusive or function of PLC itself normal condition and abnormality array, find and The different position of normal condition, then the position is exactly fault bit；

Step 6: PLC reversely searches out fault condition factor by the relationship mapped one by one in advance, breakdown judge is realized.

As an improvement of the present invention, it in the step 1), is analyzed for failure two, specific steps are as follows:

Step 1: pressing trapezoidal pattern programming logic, the output winding that needs are diagnosed is compiled in the first step, with lower step Relevant various condition element intermediate quantities are compiled；

Step 2: drawing dendrogram, the output winding that needs are diagnosed has coil as the top of dendrogram, while this Step in the condition element of each independent " with logic " be used as independent branch, and carry out the marker character with logic Number；For " or logic ", sets an intermediate quantity and concentrate as an independent branch, for the intermediate quantity conduct of this or logic New tree-shaped top carries out the branch of " or logic " condition element again；

Step 3: continue to use be in step 2 output winding the first step carry out arborizations method, to the first step In condition element carry out tree-shaped decomposition again as output winding, only to the end decompose terminate, appearance is all end factor；

Step 4: being set up to a three-dimensional matrice to each condition element, three-dimensional information is respectively as follows: the instant shape of this Need state, end factor when state, equipment output；

Step 5: the condition element of carrying three-dimensional information is arranged and is compiled by the dendrogram finished；

Step 6: the condition element of carrying three-dimensional information be compiled into Automatic-searching to end factor function

Step 7: one diagnosis button of computer client-side editing, when a failure occurs, button press carry out to step 6 into Row end factor immediate status information and the inconsistent end factor of need state, which search out, to be come, and is exactly the condition element of failure, Realization judges automatically.

Compared with the existing technology, the invention has the advantages that, the program realizes the blast furnace roof of PLC logical order control Valve is able to achieve the judgement of all abnormalities, that is, occurs: one, shutting down during normally outputing but suddenly；Two, it cannot be switched on When；Quick diagnosis is carried out to both states for being unsatisfactory for condition, it is last quickly to determine failure cause within the set range, thus Quickly discharge failure.

Detailed description of the invention

Figure 1A NS equipment exports routine PLC ladder diagram；

Dendrogram is unfolded in Fig. 2 ladder diagram " with logic " " or logic "；

The matrix rule of Fig. 3 logical condition factor；

Fig. 4 is by dendrogram rule to factor matrix structure expanded view.

Specific embodiment:

In order to deepen the understanding of the present invention, the present invention is described in detail with reference to the accompanying drawing.

Embodiment 1: referring to figures 1-4, a kind of blast furnace valve PLC logical order control failure cause judgment method is described Method is as follows；1) the blast furnace roof valve of PLC logical order control is able to achieve the judgement of all abnormalities, and failure one is normal Shut down during outputing but suddenly, failure two is when cannot be switched on 2) quickly determine failure cause within the set range, thus Quickly discharge failure.

Analyze for failure one: in output winding movement, i.e., the essential information of basic end factor is all met, when unexpected When failure, illustrate that the essential informations of some or certain two end factors is mutated under state from meeting suddenly, Become not meet, as long as the condition element that comparison changes when output winding meets output and stops output suddenly, so that it may Determine guilty culprit.

Specific steps are as follows:

For searching first kind failure:

Analyze for failure two: this kind of situation is extremely complex, because in complicated all steps, it is necessary to find an end End factor, which is just able to achieve, judges the essential information of failure factor, routinely for Artificial Logical judgement, first looks for this The step of the output winding of output, the factor all to the step judge, first have to the state of judgement " with logic ", then right " or logic " condition occurred in step is judged, it will usually which the condition element in the step occur is also the defeated of other logics Coil out, then carry out " with logic ", the judgement and lookup of " or logic ", and so on, usually only arrive some condition end factor It is unsatisfactory for output condition, is only guilty culprit；

For searching the second class failure:

Step 7: one diagnosis button of computer client-side editing, when a failure occurs, button press carry out to step 6 into Row end factor immediate status information and the inconsistent end factor of need state, which search out, to be come, and is exactly the condition element of failure, Realization judges automatically；

For example as shown in fig. 1, the output of last ANS condition is condition 1 " with logic " condition 2 by first step With " or the logic " of condition；And the output of condition 1 is also by " with logic " condition 4 and condition 6 and " or logic " condition 5 and condition 7； Successively condition 2 and condition 3 are also to be made of different logics.In actual production, regular logical is all and illustrates difference in figure one not More, last output is by many different intermediate quantities: condition 1, condition 2, the movement output of 3 final decision of condition, and condition 1, Condition 2, condition 3 have respective logic factor respectively, and the final end factor for determining ANS output is condition 1, condition 2, condition 3 Respective end factor, these end factors are all the essential informations that ANS is finally acted.

Referring to Fig. 1-Fig. 4, for failure 1, the method for implementation are as follows:

1, arrange a device action all conditions, such as: limit, interlocking, interlocking etc., i.e., the end in figure one because Element 4,

5, it 7,8,9,10,11,12,13,14,15,16 is enumerated；

2, all end conditions that logic is gone out, are compiled into an array 1；

Array bit	0	1	2	3	4	5	6	7	8	9	10	11	12
														End factor	4	5	6	7	8	9	10	11	12	13	14	15	16

Array 1

3, when logic ANS condition normally exports, the state of each of array 1 position is recorded, in array Each end factor forms the construction standard array value 2 of database, and by actual logic, the moment, ANS was normally exported, When ANS has output, which records the value of end factor；

Array bit	0	1	2	3	4	5	6	7	8	9	10	11	12
														The value of end factor	1	0	1	0	1	0	0	1	1	1	0	0	1

Array 2

4, it breaks down in ANS, when out of service suddenly, when the moment that run action stops, being recorded using PLC moment The state of the array 1 of lower all conditions, the array 3 of specific end factor value when forming out of service；

Array bit	0	1	2	3	4	5	6	7	8	9	10	11	12
														The value of end factor	1	0	0	0	1	0	0	1	1	1	0	0	1

Array 3

5, contrast standard array 2 and array out of service 3 are used it logic analysis of PLC, will be found out in two arrays That position of variation, such as variation are that the corresponding value of array bit 2 changes, then searches array 1, which is condition 6；6, Pass through control, the corresponding service condition in the position changed, so that it may judge guilty culprit.

For failure 2, the method for implementation are as follows:

The all conditions of dependent diagnostic device action, including the relevant all conditions of relevant intermediate quantity are set out, are formed Ladder diagram, Fig. 1 in this method；

1, " with logic " " or logic " in ladder diagram is unfolded by the rule in Fig. 2, since output state, is fallen Push away, output condition ANS as the highest point set greatly, independent condition just as the limb set greatly, and occur " with logic " or " or Logic " is used as an independent limb, then is decomposed, and ANS as big treetop end, have ready conditions 1, have by independent condition in figure two " or logic " condition 2 and condition 3, by rule or logic as an independent limb, then ANS resolves into independent condition 1 and sees At the t0 of independent condition " or logic "；And then tree-shaped decomposition is carried out to the t0 of " or logic ", comparative diagram 1 or logic t0 are worked as At treetop, it is broken down into limb condition t2 and condition t3；And so on, second step is unfolded in comparative diagram 1, and condition 1 is also formed New treetop, and regarded as independent limb by independent trunk condition 4, condition 6 and " or logic t1 is by condition 5 and condition 7 " and formed, it presses Expansion Theory, " or logic t1 " are launched into independent limb condition 5,7 again；It is successively regular, last all expansion, in the tree-shaped of expansion Scheme condition 4,5,7,8,9,10,11,12,13,14,15,16 finally occur in (Fig. 2), whens these conditions cannot be set again Shape decomposes, and here it is the lowermost level factor that finally results in ANS and cannot export, this method is known as end factor, these factors are final It is the logical interlock for breaching all complexity, is presented in tree-shaped expanded view, by rule is decomposed, these end factors carries three A information, it may be assumed that a, this immediate status；B, need state when equipment exports；C, end factor:

2, a three-dimensional matrice is established to all conditions, such as figure three: a, the immediate status of this；When b, equipment exports Need state；C, end factor, the judgment method of the data structure are as follows: if it is end factor, then the immediate status of this It is not overlapped with the state of needs, is exactly failure factor, for example the end factor of operation condition matrix of blast furnace valve is to reach position, In the actual process, it is not arrived because reaching position, then the process judged are as follows: because being end factor, the immediate status of this (because not in place) is 0；And need state when equipment output is 1；Three by conditions cannot meet simultaneously, i.e. failure end End factor is just that valve reaches a signal；

3, each (figure one) logical condition be unfolded to by rule by the rule of (figure three) by tree-shaped expanded view, be formed The data structure expanded view of figure four, the in this way data structure of each end factor are clearly；

4, each output condition of blast furnace roof valve system, such rule is all pressed, forms end factor data knot Structure, while diagnosis key is set up on the client, when some valve akinesia, diagnosis key is pressed, data structure is sentenced It is disconnected.

It should be noted that above-described embodiment, is not intended to limit the scope of protection of the present invention, in above-mentioned technical proposal On the basis of made equivalents or substitution each fall within the range that the claims in the present invention are protected.

Claims

1. a kind of blast furnace valve PLC logical order controls failure cause judgment method, which is characterized in that the method is as follows；1) The blast furnace roof valve of PLC logical order control is able to achieve the judgements of all abnormalities, failure one be positive it is normally opened go out during But shutdown suddenly, failure two are when cannot be switched on 2) quickly determine failure cause within the set range, thus quickly discharge event Barrier.

2. blast furnace valve PLC logical order according to claim 1 controls failure cause judgment method, which is characterized in that In the step 1), analyzed for failure one, specific steps are as follows:

For searching failure one:

Step 1: 32 bit arrays of a whole word structure are initially set up, and it is enough for general output, if not enough may be used Using 64 double whole word structures；

Step 2: each condition relative to output winding is pressed the rule of programmer setting, one of array is carried out It maps one by one；Each position of this array in this way then corresponds to a condition element；

Step 3: each value of the array is recorded when output winding movement；The value at the moment is exactly to meet output Each condition element state；

Step 4: equally the value of the array is recorded when output winding abends；The value at the moment is exactly to be unsatisfactory for The state of each condition element of output；

Step 5: searched using the exclusive or function of PLC itself normal condition and abnormality array, find and normally The different position of state, then the position is exactly fault bit；

3. blast furnace valve PLC logical order according to claim 2 controls failure cause judgment method, which is characterized in that In the step 1), analyzed for failure two, specific steps are as follows:

Step 1: pressing trapezoidal pattern programming logic, the output winding that needs are diagnosed is compiled in the first step, with lower step phase The various condition element intermediate quantities closed are compiled；

Step 2: draw dendrogram, the output winding that needs are diagnosed has this ladder of coil as the top of dendrogram The condition element of each in grade independent " with logic " is used as independent branch, and carries out the label symbol with logic；It is right It in " or logic ", sets an intermediate quantity and concentrates as an independent branch, for the intermediate quantity of this or logic as newly Tree-shaped top carries out the branch of " or logic " condition element again；

Step 3: continue to use be in step 2 output winding the first step carry out arborizations method, in the first step Condition element carries out tree-shaped decomposition as output winding again, and only decomposing to the end terminates, and appearance is all end factor；

Step 4: be set up to a three-dimensional matrice to each condition element, three-dimensional information be respectively as follows: this immediate status, Need state, end factor when equipment exports；

Step 7: one diagnosis button of computer client-side editing, when a failure occurs, button press carry out carrying out end to step 6 End factor immediate status information and the inconsistent end factor of need state, which search out, to be come, and is exactly the condition element of failure, is realized It judges automatically.