WO2016017944A1

WO2016017944A1 - System and method for notifying abnormal state of automated process

Info

Publication number: WO2016017944A1
Application number: PCT/KR2015/006819
Authority: WO
Inventors: 왕지남; 김철환; 김태완; 안승훈; 방성문
Original assignee: 주식회사 유디엠텍
Priority date: 2014-07-28
Filing date: 2015-07-02
Publication date: 2016-02-04
Also published as: KR101566358B1

Abstract

Disclosed are a system and a method for notifying an abnormal state of an automated process. The system for notifying the abnormal state of an automated process according to an embodiment of the present invention comprises: a log data collection unit for collecting log data from a programmable logic controller (PLC), the log data being generated when the PLC controls equipment for performing an automated process with a PLC control program programed as a ladder diagram; an abnormal state identification unit for identifying contact information of the equipment having caused the abnormal state of the automated process from the comparison of a master pattern generated using the log data and the normal state reference information of the automated process; and a diagram display unit for visualizing in diagram format and outputting the contact information of the equipment having caused the abnormal state and the occurrence time information of the abnormal state identified from the log data.

Description

Automated Process Abnormal Condition Notification System and Method

The present invention relates to a system and method for notifying an abnormal state of an automated process, and more particularly, to simplify and visualize a relation path of an input condition versus an output in a diagram of a logic of a LD (Ladder Diagram) format related to an abnormality of an automated process. The present invention relates to a technology that enables detailed tracking of the cause of an error and quickly solves problems occurring during the control program identification and operation.

Programmable Logic Controller (PLC) is a stable control device for process control in the automation industry.It is programmable to cope with frequent system changes in the field caused by small quantity production of various products, and from the need for a controller that is small and relatively free of system changes. Developed.

Programming languages for operating PLCs include LD (Ladder Diagram), Function Block Diagrma (FB), Structure Text Language (STL), etc., but programming with LD is used in most industrial sites due to the language's intuition and simplicity. . LD arranges the contact for output by AND and OR structure by step and makes sequence and condition for process control by using various arithmetic and function.

LD uses logic to express logic and expresses each step as if drawing each step like drawing, so space utilization for programming is low but it is easy and simple to write small step. The analysis of the written program is also possible to read the program sequentially, based on the output of the step, so that the structure can be understood much faster and easier than interpreting the program written in the text-based STL.

However, if the complexity of the process is high, the number of objects to be controlled, and complex interlock relationships are required, the number of steps is also increased, which prevents the entire program from representing logic in one sheet. In addition, even in small lines, the number of program steps is hundreds to thousands of steps. Due to the characteristics of the control program, a sheet or function for programming by the relevant process and equipment is not programmed for all the facilities in the process in one sheet. Since the logic is written separately, the cross-reference area cross-referenced between sheets becomes very large. This leads to spatial limitations in understanding the LD represented by the schematic structure, which makes the interpretation of the program difficult.

Most automation industries program for control of controllers through LD, and when problems occur during process operation, identify the problem spots through the Human Machine Interface (HMI) installed in the field. We will analyze the logic involved. However, if the tracking step goes beyond several steps in tracking all the input prerequisites of the control logic in question, the number of related conditions will increase dramatically, so that the tracking path is also hard to remember. It becomes complicated and makes it difficult to solve the problem correctly.

The logic of LD (Ladder Diagram) type related to the abnormality of the automation process is simplified by visualizing the relationship path of the input condition to the output with a diagram to make it possible to trace the cause of the error in detail and to identify and control the control program. An automated process fault notification system and method is proposed to solve the problem quickly.

The problem to be solved of the present invention is not limited to the above-mentioned problem, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Automated process abnormal state notification system according to an aspect of the present invention, the PLC (Programmable Logic Controller) control program programmed in a ladder diagram (Ladder Diagram) Log (Log data generated by controlling the equipment to perform the automated process PLC) Log collection unit for collecting the; An abnormal state determining unit which grasps contact information of a facility that has generated an abnormal state of the automated process by comparing the master pattern generated using the log with normal state reference information of the automated process; And a diagram representation unit for visualizing and outputting the contact information of the equipment generating the abnormal state and the occurrence time information of the abnormal state identified from the log in a diagram format.

The abnormal state detecting unit is configured to receive a group including a cycle which is a contact point that distinguishes the start and the end of the work for each task of the automated process and the names of the contacts that affect the normal performance of the work, and for each job from the log. During the cycle of the task, the extraction process of the sequence, which is On / Off flow over time of the contacts included in the group of the task, is repeatedly extracted, and the frequency of appearance among the extracted sequences A master pattern generator which determines the most sequence as the master pattern; And an abnormal state checking unit for checking whether or not the master pattern matches the sequence of the normal state reference information of the automated process and identifying contact information of a facility that has generated an abnormal state of the automated process according to the checking result.

The diagram representation unit is output from the PLC as an instruction list (IL) to extract the position information of the ladder contact point using a PLC control program in a text format, and must be turned on before the output is turned on. A logic converter for extracting an optional condition representing each of a plurality of parallel conditions for outputting on except for the common condition, which is an input condition, and the common condition; And outputting the contact point of the facility which generated the abnormal state by using the common condition and the option condition, the contact information of the facility which generated the abnormal condition of the automated process and the occurrence time information of the abnormal condition identified from the log. And a diagram visualization unit for outputting a common condition and an option condition, which are a preceding input condition of the output contact, as a diagram to be displayed as a subcondition of the output contact.

The diagram visualization unit may output the contact information, which is the output, and the common condition and the option condition, which are the preceding input conditions of the output contact, as a diagram on one screen.

The common condition and the option condition may include at least one of a contact name, a contact address, an on / off order, a contact state, a contact type, and contact time information for a contact.

The automatic process abnormal state notification method according to another aspect of the present invention, the PLC (Programmable Logic Controller) control program programmed in a ladder diagram (Ladder Diagram) Log generated by controlling the equipment to perform the automation process PLC (Log data) Collecting) from the PLC; Identifying contact information of a facility that has generated an abnormal state of the automated process by comparing the master pattern generated by using the log with normal state reference information of the automated process; And visualizing and outputting the contact information of the equipment generating the abnormal state and the occurrence time information of the abnormal state identified from the log in a diagram form.

Identifying the contact information of the equipment that has caused the abnormal state of the automated process, On (on) according to the time of the contacts that affect the normal performance of the operation during the cycle of the operation for each task of the automation process from the log Repeatedly extracting a sequence of a) / off flow to determine a sequence having the most occurrence frequency as the master pattern; And checking whether or not the master pattern matches the sequence of the steady state reference information of the automation process, and determining contact information of a facility that has generated an abnormal state of the automation process according to the check result.

The step of visualizing and outputting the contact information of the equipment generating the abnormal state and the occurrence time information of the abnormal state grasped from the log in a diagram form is outputted from the PLC as an IL (Instruction List) to be a text PLC control program. The position information of the ladder contact is extracted by using, and the common condition which is a pre-input condition that must be turned on for the output to be turned on, and a plurality of parallel conditions for the output to be turned on except for the shared condition. Extracting an optional condition indicating a value; Outputs the contact point of the facility which generated the abnormal state by using the common condition and the option condition, the contact information of the facility which generated the abnormal state of the automated process, and the occurrence time information of the abnormal state identified from the log. And outputting a common condition and an option condition, which are preceding input conditions of the output contact, as a diagram to be displayed as a subcondition of the output contact.

According to an automated process abnormal state notification system and method according to an embodiment of the present invention, the logic of LD (Ladder Diagram) format related to the abnormality of the automated process is simplified by visualizing the relationship path of the input condition to the output with a diagram. It enables to trace the cause of abnormalities in detail and to quickly identify the control program and solve problems during operation.

1 is a view showing the configuration of an automated process abnormal state notification system according to an embodiment of the present invention.

2 is a diagram illustrating information included in each task group of an automation process.

3 is a diagram illustrating a master pattern extraction flow.

4 is a diagram illustrating a logic conversion flow.

FIG. 5 is a diagram illustrating structure information of a PLC control program divided into network units.

FIG. 6 is a diagram showing that a ladder control PLC control program is output from the PLC in an IL file in a text format.

7 is a diagram illustrating a condition list in XML format.

8 is a diagram illustrating a process of obtaining ladder position information of each condition of the condition list.

9 is a diagram illustrating a flow for obtaining common conditions and optional conditions.

FIG. 10 is a diagram illustrating common and optional conditions obtained according to the flow shown in FIG. 9.

FIG. 11 is a diagram showing a contact point of an equipment that has generated an abnormal state in an automated process as an output (coil) and prerequisites having a relationship between a common condition and an optional condition.

12 is a flowchart of an automated process abnormal state notification method according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified in many different forms, the scope of the present invention It is not limited to the following embodiments. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various members, regions, and / or portions, it is obvious that these members, components, regions, layers, and / or portions should not be limited by these terms. Do. These terms do not imply any particular order, up or down, or superiority, and are only used to distinguish one member, region or region from another member, region or region. Accordingly, the first member, region, or region described below may refer to the second member, region, or region without departing from the teachings of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing embodiments of the present invention. In the drawings, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the present invention should not be construed as limited to the specific shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

Referring to Figure 1, the automated process abnormal state notification system according to an embodiment of the present invention by identifying the contact point and the occurrence time of the equipment that caused the abnormality in the automation process during the operation of the automation process, causing the abnormality in the automation process The contact point of the facility is a coil (also referred to as an output and is used in the same meaning below), and the contact point of the facility that generated the abnormality and the contact points of the facilities necessary for the operation of the facility that generated the abnormality are output in a diagram. By simplifying and visualizing the structure with the relationship path of contrast input condition, the automated process managers can trace the abnormal cause in detail and quickly identify the control program and solve the problems occurring during operation.

The automated process abnormal state notification system includes a log collecting unit 2, an abnormal state detecting unit 3 and a diagram representation unit 6.

Log collection unit 2 is a PLC (Programmable Logic Controller) control program programmed with a ladder diagram (Ladder Diagram) Log generated by controlling the equipment (not shown) that the PLC 1 performs an automated process (Log) data) is collected from the PLC (1).

The abnormal state detecting unit 3 grasps contact information of a facility that has generated an abnormal state of the automated process by comparing the master pattern generated using the log with the normal state reference information of the automated process. As shown in FIG. 1, the abnormal state checking unit 3 includes a master pattern generation unit 4 and an abnormal state checking unit 5.

The master pattern generation unit 4 is set a group including the name of the cycle for distinguishing the start and end of the operation for each task of the automated process and the name of the contact point affecting the normal performance of the operation, and from the log During each cycle of the task, the extraction process of the sequence, which is On / Off flow over time of the contacts included in the group of the task, is repeatedly extracted, and the frequency of occurrence of the extracted sequences is repeated. The sequence with the highest number is determined as the master pattern.

The operation of the master pattern generator 4 will be described with reference to FIG. 2. Referring to FIG. 2, when the A automation process is composed of A1 work, A2 work, A3 work, ....., An work, the name of the cycle and the corresponding contact point for distinguishing the start and end of the work for each job During a cycle of work, the contact names that affect the normal performance of the work are set as groups. For example, in the case of the A3 operation, the cycle name is set to Y0 and the key is set to Y1, Y2, Y3, and Y4. This group may further include General, which is the name of the cycle, the key, as well as the names of the contacts needed to extract the work flow of the automation process. In the work A3 of Fig. 2, the generals are set to Y10, X9, X8, X7, X6, ....

After the group for each task is set in this way, the master pattern generation unit 4 flows from the log on / off according to the time of the contacts included in the group of the task during the cycle of the task for each task. The extraction process of the in sequence is repeated. For example, referring to FIG. 3, seven sequences are extracted from a log by repeating the cycle of the A3 operation for the A3 operation seven times. In this case, it should be noted that the number of repetitions of the sequence extraction process may vary depending on the setting.

The master pattern generator 4 determines a master pattern having the highest appearance frequency among the extracted sequences after the sequence extraction process is completed. Referring to FIG. 3 as an embodiment, the master pattern generation unit 4 generates "Y4-> Y2-> Y1-> Y3", the sequence having the highest frequency of appearance, as a master pattern.

After the master pattern is set in this way, the abnormal state check unit 5 checks whether the sequence of the master pattern and the sequence of the normal state reference information of the automated process matches and causes the abnormal state of the automated process according to the check result. Find contact information of. The abnormal state checking unit 5 determines that there is an error in the automation process when the master pattern and the sequence, which is the normal state reference information of the automation process, do not match, and generates an abnormal state in the automation process by contact points that do not match. It is identified by the contact information of the facility. In an embodiment, when the master pattern is "Y4-> Y2-> Y3" and the sequence of the steady state reference information of the automation process is "Y4-> Y2-> Y1-> Y3", Y2 is next if the sequence is normal. Y1 should be executed, but in the case of the master pattern, Y3 is executed after Y2, so it is determined that there is an error in Y1, and this Y1 can be regarded as a contact point of the equipment that has caused an abnormal state in the automation process.

As described above, the abnormal state checking unit 5 grasps contact information of the equipment that generated the abnormal state in the automated process, and then transmits it to the diagram expression unit 6.

In FIG. 1, the diagram representation unit 5 visualizes and outputs contact information of the equipment that generated the abnormal state and occurrence time information of the abnormal state identified from the log in a diagram form.

This diagram representation section 6 includes a logic converter 7 and a diagram visualization section 8.

The logic converter 7 is output from the PLC 1 as an IL (Instruction List) to extract the position information of the ladder contact point using a text-type PLC control program, so that the output is turned on. The common condition, which is a preceding input condition to be turned on, and an optional condition representing each of a plurality of parallel conditions for turning on the output except the common condition are extracted.

The operation of the logic converter 7 will be described with reference to FIGS. 4 to 10.

4 is a diagram illustrating a logic conversion flow according to an embodiment of the present invention.

Referring to FIG. 4, the logic converter 7 performs a ladder analysis of a PLC control program in a ladder format through command analysis in a PLC control program in a text format output from the PLC 1 as an IL (Instruction List). The structural information is extracted, and the extracted structural information is divided into a network unit in which a path is connected from an input to an output in order to divide the extracted structural information by a coil reference. An example divided into the network units is illustrated in FIG. 5. Referring to FIG. 5, a structure of a PLC control program represented by a coil center is divided into two networks for three coils.

The structure information of the extracted ladder type PLC control program includes contact names, contact addresses, and commands (eg, AND, OR, and the like) of the contacts existing on the ladder type PLC control program.

After the structure of the extracted PLC control program is divided in units of networks, the logic converter 7 generates a condition list in units of coils (outputs). It extracts the structure information of PLC control program from the center of coil through command analysis in the text control PLC control program outputted from the PLC 1 to IL and outputs the condition list including the structure information in XML format. . At this time, the PLC control program in text format output from the PLC 1 to IL is illustrated in FIG. 6, and an example of a condition list in XML format is illustrated in FIG. 7. Referring to FIG. 7, the PLC control program in the XML format has the same structure as the PLC control program expressed by the ladder LD. In other words, only the expression method is different, and the original function should be noted that the same.

After generating the condition list containing the structure information of the PLC control program in this way, the logic converter 7 obtains ladder position information of each condition of the condition list. The reason for obtaining the ladder position information of each condition is to find the common condition (COM) and the option condition (OPT) by extracting the point information of the ladder contact point.

This will be described with reference to FIG. 8. Referring to FIG. 8, the logic converter 7 adds position information of a contact point along the X and Y axes while searching for a path from an initial starting point. Proceed from the initial position to the right, when X1 is encountered (1, 0), when X2 is met (2, 0), when Y1 is met (3, 0), the location information is set for each address and memory (not shown) ). After branching from the initial position and proceeding downward (Y-axis direction), when M70 is encountered (1, 1), when X30 is encountered, (2, 1), location information is set for each address and stored in the memory. Memory corresponding to coil Y1 of one network stores position information of X1 (1, 0), X2 (2, 0), M70 (1, 1), X30 (2, 1), and the corresponding coil Y1 is called. When it is done, it outputs the saved location information in response to the call.

After obtaining the ladder position information of each condition as described above, the logic converter 7 excludes the common condition and the common condition which is a preceding input condition that must be turned on in order for the coil (output) to be turned on. Extract an optional condition representing each of the multiple parallel conditions to be turned on.

This will be described with reference to FIGS. 9 and 10. 9 and 10, the logic converter 7 starts a path search process from the initial Y1. When X3 is encountered, X3 is stored in memory. When X3 is reached, X3 is replaced by G1. Move left to meet X2 and store G1 + X2 at address BM 1 in memory. Move left to meet X1 and store G1 + X2 + X1 at address BM2 in memory. Move down from the fork to meet X30 and store G1 + X30 at address BM3 in memory. Move left to meet M70 and store G1 + X30 + M70 at address BM4 in memory. If there are no more paths to search, stop the search and end the process.

After that, the common condition and the option condition are obtained by comparing the values stored in the memory.

A description thereof will be described with reference to FIG. 10. Referring to FIG. 10, the logic converter 7 first calls values stored in addresses BM1 to BM4 of a memory. The values called are as follows. BM1 = G1 + X2-> X3 + X2, BM2 = G1 + X2 + X1-> X3 + X2 + X1, BM3 = G1 + X3-> X3 + X30, BM4 = G1 + X30 + M70-> X3 + X30 + M70. Thereafter, the logic converter 7 calls a value stored in the memory, extracts a commonly used contact point, and sets it as a common condition. In the example above, X3 is a commonly used contact, which is a common condition. After obtaining the common condition like this, the logic converter 7 enhances the common condition in the contents stored in each of the BM1 to BM4 of the memory and compares the contact sets according to the similarity. That is, BM1 and BM2 are compared, and BM3 and BM4 are compared, and X2 <X2 + X1 and X30 <X30 + M70. Based on this comparison, a large set is an optional condition. That is, in the above example, BM2 and BM4 are optional conditions.

The common condition and the option condition obtained in the logic converter 7 are transmitted to the diagram visualization unit 8. It should be noted that the common condition and option condition transmitted in this way are the values obtained by analyzing the whole PLC control program, and are not for a specific part of the PLC control program.

The diagram visualization unit 8 generates the abnormal state by using the common condition and the option condition, the contact information of the facility which generated the abnormal state of the automated process, and the occurrence time information of the abnormal state identified from the log. The contact of is outputted, and the common condition and the option condition, which are the preceding input condition of the output contact, are output as a diagram to be displayed as the subcondition of the outputted contact. In this case, the output contact point, the common condition and the option condition as the preceding input condition of the contact point may be output in a diagram on one screen. Accordingly, it is not necessary to change the state of the screen, for example, by scrolling the initial output screen of the diagram in order to grasp the contact point that caused the abnormal state in the automation process and its prerequisites. Since the contact point of the generated equipment can be confirmed at a glance, the operation manager of the automated process does not have to identify the contact point that caused the abnormal state through complicated analysis.

An example of a diagram output by the diagram visualization 8 is shown in FIG. 11. At this time, the common condition and the option condition of the preceding input condition of the contact as the output (coil) include at least one of a contact name, a contact address, an on / off order, a contact state, a contact type, and a contact time for the contact. In this case, the contact time information, the on / off order, the contact state, and the contact type can be obtained from the log. The contact type indicates the type of contact, and there are two types of contacts, A contact and B contact. A contact is a contact that is conductive when the corresponding contact is ON in logic. B contact is a contact that is shorted when the corresponding contact is ON in logic. And the contact status shows the contact logic information at the contact time shown in the diagram. The contact time indicates the time when an abnormal state occurs in the automation process, and the on / off order indicates the operating sequence of the contacts, and the on / off order can be used to find the delay factor of the output contact.

12 is a flowchart illustrating an automatic process abnormal state notification method according to an embodiment of the present invention. The automated process abnormal state notification method according to an embodiment of the present invention may be performed by the system of FIG. 1.

Referring to FIG. 12, a PLC (Programmable Logic Controller) control program programmed with a ladder diagram (Ladder Diagram) collects log data generated by controlling a facility for which an PLC performs an automation process from the PLC (S10). ).

Thereafter, the contact information of the equipment generating the abnormal state of the automation process is determined by comparing the master pattern generated using the log with the normal state reference information of the automation process (S20). That is, the process of extracting a sequence, which is an on / off flow according to time of the contacts, affecting the normal performance of the task during the cycle of the task for each task of the automation process is repeated from the log. Extraction to determine the sequence with the highest frequency of appearance as the master pattern. Check whether or not the master pattern and the sequence of the steady state reference information of the automated process is matched to determine the contact information of the equipment that caused the abnormal state of the automated process according to the check result.

After the contact information of the equipment that generated the abnormal state of the automated process is identified, the contact information of the equipment which generated the abnormal state and the occurrence time information of the abnormal state identified from the log are visualized in a diagram form. Output (S30). That is, it is outputted from the PLC as IL (Instruction List) and extracts the position information of the ladder contact point using a PLC control program in a text format, and is a common input condition that must be turned on in order for the output to be turned on. Except for the condition and the common condition, an optional condition representing each of a plurality of parallel conditions for turning on the output is extracted. Then, using the common conditions and option conditions, the contact information of the equipment generating the abnormal state of the automated process and the occurrence time information of the abnormal state identified from the log, the contact point of the equipment generating the abnormal state as an output. A common condition and an option condition, which are preceding input conditions of the output contact point, are output as a diagram to be displayed as a lower condition of the output contact point.

So far, the present invention has been described with reference to the embodiments. Those skilled in the art will understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. Therefore, the scope of the present invention should not be construed as being limited to the above-described examples, but should be construed to include various embodiments within the scope of the claims and equivalents thereof.

The present invention can be used to determine the cause of the abnormal state of the automated process.

Claims

A log collector configured to collect, from the PLC, log data generated by controlling a facility in which a PLC performs an automated process by a PLC (Programmable Logic Controller) control program programmed with a ladder diagram;

An abnormal state determining unit which grasps contact information of a facility that has generated an abnormal state of the automated process by comparing the master pattern generated using the log with normal state reference information of the automated process; And

Automated process abnormal state notification system, characterized in that it comprises a diagram display unit for visualizing and outputting the contact information of the equipment generating the abnormal state and the occurrence time information of the abnormal state identified from the log in the form of a diagram.
The method according to claim 1,

The abnormal state determiner,

A group including a cycle, which is a contact point that distinguishes a start and an end of the work from each task of the automation process, and a group including the names of the contact points that affect the normal performance of the work is set, The process of extracting a sequence, which is an on / off flow over time, of contacts included in a group of jobs is repeatedly extracted, and the master having the highest occurrence frequency among the extracted sequences is mastered. A master pattern generation unit determining the pattern; Wow

And an abnormal state checking unit for checking whether or not the master pattern and the sequence of the normal state reference information of the automated process match each other and determining contact information of a facility that has generated an abnormal state of the automated process according to the checking result. Automated process abnormal status notification system.
The method according to claim 1,

The diagram expression unit,

Common condition, which is a pre-input condition that must be turned on to output the position information of the ladder contact by outputting it from the PLC as an IL (Instruction List) and using a text-type PLC control program. And a logic converting unit extracting an option condition representing each of a plurality of parallel conditions for turning on an output except for the common condition. Wow

The contact point of the equipment which generated the abnormal state is outputted by using the common condition and the option condition, the contact information of the equipment which generated the abnormal state of the automated process and the occurrence time information of the abnormal state identified from the log. Automated process abnormal state notification system, characterized in that it comprises a diagram visualization unit for outputting a common condition and an option condition that is a preceding input condition of the output contact point as a diagram to be displayed as a sub-condition of the output contact point.
The method according to claim 3,

The diagram visualization unit,

The automated process abnormal state notification system, characterized in that the output contact information, and the common condition and the option condition that is the preceding input condition of the output contact is output in a diagram on one screen.
The method according to claim 3,

The common condition and the optional condition may include at least one of a contact name, a contact address, an on / off order, a contact state, a contact type, and contact time information for a contact point.
Collecting, from the PLC, log data generated by controlling a facility in which a PLC performs an automated process by a PLC (Programmable Logic Controller) control program programmed with a ladder diagram;

Identifying contact information of a facility that has generated an abnormal state of the automated process by comparing the master pattern generated by using the log with normal state reference information of the automated process; And

Automatic process abnormal state notification method comprising the step of visualizing and outputting the contact information of the equipment generating the abnormal state and the occurrence time information of the abnormal state identified from the log in the form of a diagram.
The method according to claim 6,

Identifying the contact information of the equipment that caused the abnormal state of the automated process,

From the log, the extraction process of the sequence, which is on / off flow over time, of contact points affecting the normal performance of the task during the cycle of the task is repeatedly extracted from the log. Determining the master pattern with the most occurrence frequency as the master pattern; Wow

Checking whether the master pattern matches the sequence of the normal state reference information of the automation process and determining contact information of a facility that has generated an abnormal state of the automation process according to the confirmation result How to notify process abnormalities.
The method according to claim 6,

The step of visualizing and outputting the contact information of the equipment that generated the abnormal state and the occurrence time information of the abnormal state identified from the log in a diagram form,

Common condition, which is a pre-input condition that must be turned on to output the position information of the ladder contact by outputting it from the PLC as an IL (Instruction List) and using a text-type PLC control program. And extracting an option condition representing each of a plurality of parallel conditions for the output to be turned on except for the common condition. Wow

By using the common condition and the option condition, the contact information of the equipment generating the abnormal state of the automated process and the occurrence time information of the abnormal state identified from the log, the contact point of the equipment generating the abnormal state is outputted. Automated process abnormal state notification method comprising the step of outputting a common condition and an option condition that is a preceding input condition of the output contact point as a diagram to be displayed as a sub-condition of the output contact.
The method according to claim 8,

The automated process abnormal state notification method, characterized in that the output contact information, the common condition and the option condition, which is a preceding input condition of the output contact is output on the diagram on a screen.
The method according to claim 8,

The common condition and the optional condition may include at least one of a contact name, a contact address, an on / off order, a contact state, a contact type, and contact time information of a contact point.