JPH0619531A - Plant controller - Google Patents

Abstract

PURPOSE:To eliminate the need to make a skilled operator stand by at all times by automatically eliminating an abnormal state of an industrial plant. CONSTITUTION:An electric signal value corresponding to the abnormal state which is possibly entered during the operation of a plant 1 and a countermeasure method for the abnormal state are written in a data base 8. The electric signal value written in the data base 8 is compared with the electric signal value from a plant state detector 2 to recognize whether or not the abnormal state occurs. The countermeasure method corresponding to the recognized state is retrieved in the data base 8 and sent to a driving command generating device 13. The driving command generating device 13 generates and sends a driving command to driving equipment according to the sent countermeasure method. Consequently, the abnormal state of the plant 1 is automatically eliminated.

Description

Detailed Description of the Invention

[0001]

This invention relates to a plant (for example,
The present invention relates to a plant control device for recognizing an operating state of an industrial plant, searching for a coping method for the recognized operating state, and generating a drive command for changing the state of the plant based on the searched coping method.

[0002]

2. Description of the Related Art FIG. 4 is a system configuration diagram showing a conventional plant control apparatus and shows an example of application to a steel plant as an industrial plant. In the figure, 1 is a steel plant, 2 is a plant state detector such as a sensor for converting the state of the plant 1 into an electric signal, 3 is a controller for control,
Reference numeral 4 is an application program installed in the controller 3, 5 is a driving device such as a motor for actually moving the plant 1, 6 is an operator who operates the plant 1, and 7 is an operation panel. In this plant control device, for example, when the state of the material flowing through the plant 1 changes, the plant state detector 2 converts this state into an electric signal and gives it to the controller 3. The controller 3 reads the application program 4 and executes the contents of the application program 4 on the CPU. At this time, the controller 3 also reads the electric signal from the plant state detector 2 as an input of the application program 4 at the same time. The application program 4 describes a coping method for the predictable operation state (normal state) of the plant 1. The controller 3 searches the coping method described in the application program 4 for a coping method corresponding to the electric signal value from the plant state detector 2, and based on the searched coping method, the controller 3 searches the driving device 5 for the coping method. Generate a drive command. As a result, the state of the plant 1 is maintained in the optimum state.

[0003]

However, according to such a conventional plant control device, the application program 4 is operated during operation (during operation) or at startup.
If a state (abnormal state) not described in 1. occurs in the plant 1, the controller 3 cannot find a coping method for the state, and the control becomes impossible. Under such a situation, the operator 6 judges the state of the plant 1 visually or from various information, and manually issues a drive command to the drive equipment 5 via the operation panel 7 to eliminate the abnormal state. That is, in the conventional plant control device, when an abnormal state not described in the application program 4 occurs in the plant 1, the intervention of the operator 6 is indispensable. For this reason, the operator 6 must be always on standby in order to eliminate the abnormal state during the operation or start-up of the plant 1. In addition, since accurate judgment is required for various possible states, it is necessary to hire a skilled operator who has sufficient experience and judgment.

[0004]

The present invention has been made to solve the above problems, and the first invention (the invention according to claim 1) is a plant state detecting means for detecting the state of a plant. And an abnormal state recognition means for recognizing an abnormal state of the plant based on the plant state detected by the plant state detection means, a coping method accumulating means for accumulating coping methods for various abnormal states in the plant, and an abnormal state recognition means for recognizing The coping method for the above-mentioned abnormal condition is searched for from the coping methods stored in the coping method storage section, and the drive command for changing the state of the plant based on the coping method searched by the coping method searching section. And drive command generating means for generating. The second invention (the invention according to claim 2) is a plant state detecting means for detecting the state of the plant, and an operating state recognition for recognizing the operating state of the plant based on the plant state detected by the plant state detecting means. Means, a first coping method accumulating means for accumulating coping methods for various abnormal states in the plant, a second coping method accumulating means for accumulating coping methods for various normal states in the plant, and an operation state recognition means. Based on the coping method search unit that searches the coping method stored in the first and second coping method storage units for the coping method for the operating state described above, and the coping method searched by the coping method search unit, the state of the plant Drive command generating means for generating a drive command for changing

[0005]

Therefore, according to the first invention of the present application, when an abnormal state occurs in the plant during operation or startup,
This abnormal state is recognized by the abnormal state recognition means, and the coping method for the recognized abnormal state is searched from the coping methods stored in the coping method storage means, and the drive command is issued based on the searched coping method. Occurrence occurs, and as a result, the abnormal state in the plant is automatically resolved. Further, according to the second invention of the present application, if the operating state of the plant is recognized by the operating state recognizing means and is recognized as a normal state, the coping method for the recognized normal state is stored in the first coping method accumulating means. If the stored coping method is searched and recognized as an abnormal state, the coping method for the recognized abnormal state is searched from the coping methods stored in the second coping method storage means, and this search is performed. A drive command is generated based on the countermeasures taken by this, and in addition to the control from the normal state to the optimum state,
The abnormal condition in the plant will be automatically resolved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The plant control device according to the present invention will be described in detail below.

Example 1. FIG. 1 is a system configuration diagram showing an embodiment of this plant control device, and the same reference numerals as those in FIG. 4 indicate the same or equivalent components, and the description thereof will be omitted.

In the figure, 8 is an operation abnormality information database in which an electric signal value corresponding to an abnormal state that can occur during operation of the plant 1 and a method of coping with the abnormal state are described, and 9 is an operation abnormality information database 8. An input device that enables input, 10 is an electric signal storage device that stores each electric signal from the plant state detector 2, and 11 is an electric signal value described in the operation abnormality information database 8 and the electric signal storage device 10 When the abnormal state recognition unit 11 recognizes the occurrence of an abnormal state by comparing the stored electric signal value with the abnormal state recognition unit, the abnormal state recognition unit 11 operates a method of coping with the recognized abnormal state. An abnormal state coping method search unit that searches the abnormal information database 8;
Reference numeral 13 denotes a drive command generator that generates a drive command to the drive equipment 5 in accordance with the coping method retrieved by the abnormal state coping method retrieval unit 12, and includes an operation abnormality information database 8, an electric signal storage device 10, and an abnormal state recognition unit 11 The abnormal state coping method search unit 12 and the drive command generator 13 are built in a dedicated computer.

The description in the operational abnormality information database 8 is as follows:
The operation is performed by the operator 6 using the input device 9 as follows. That is, for all the abnormal states that can occur during operation in the plant 1, the value of the electric signal sent from the plant state detector 2 when the abnormal state occurs is used for each abnormal state using the input device 9. Then, the operation abnormality information database 8 is described. When the abnormal state is represented by a plurality of electric signal values, each electric signal value is described as one set. Next, for each abnormal state, the operating method of the drive device 5 for eliminating this, that is, the coping method, is described in the operational abnormality information database 8 using the input device 9.

Next, the characteristic operation of this plant control device will be described. During operation, an electric signal is sequentially sent from the plant state detector 2 as information indicating the state of the plant 1. The sent electric signals are stored in the electric signal storage device 10 in the order in which they are sent.

The abnormal state recognizing unit 11 reads out the electric signal value from the electric signal storage device 10 at regular intervals, reads out the electric signal value indicating the abnormal state from the operation abnormality information database 8, and compares the two. Based on the comparison result, the abnormal state recognition unit 11 recognizes the occurrence of the abnormal state and issues a command to the abnormal state coping method search unit 12 to search for a coping method. Abnormal state coping method search unit 12 that received the command
Searches the coping method described in the operation abnormality information database 8 for the coping method for the recognized abnormal state,
The retrieved coping method is sent to the drive command generator 13.

The drive command generation device 13 generates a drive command to the drive equipment 5 according to the received coping method. The drive equipment 5 operates according to the drive command sent thereto, whereby the abnormal state in the plant 1 is automatically eliminated.

Here, as another method, it is assumed that the application program 4 describes a method of coping with an abnormal state that may occur during the operation of the plant 1, and the electric signal from the plant state detector 2 is selected from the coping methods. A method of searching for a coping method according to the value and generating a drive command from the controller 3 is conceivable. However, when such a method is adopted, there is a problem that the application program 4 becomes huge and the maintainability deteriorates. .
On the other hand, in the present embodiment, the operation abnormality information database 8, the electric signal storage device 10, the abnormal state recognition unit 11, the abnormal state coping method search unit 12, and the drive command generation device 13 are built in a dedicated computer. Therefore, the application program 4 does not increase and the maintainability becomes good.

Example 2. The first embodiment has been described as an example of recognizing an abnormal state during operation of the plant 1 and automatically eliminating this abnormal state. In contrast, Figure 2
As shown in FIG. 5, a startup abnormality information database 14 is provided instead of the operation abnormality information database 8, and the startup abnormality information database 14 deals with the electrical signal value corresponding to the abnormal state that can occur at the time of startup of the plant 1 and the countermeasure for the abnormal state. If the method is described, it becomes possible to automatically eliminate the abnormal state that occurs when the plant 1 is started, as in the first embodiment.

Example 3. Further, in the first and second embodiments, the method of eliminating the abnormal state occurring in the plant 1 has been described, but as shown in FIG. 3, in addition to the operation abnormality information database 8 and the startup abnormality information database 14, the operation information database 15 And the control method performed by the controller 3 is described in the operation information database 15 using the input device 9, that is, the operation information database 15 and the electric signal values corresponding to various normal states in the plant 1 and its values. If the method of coping with the normal state is described, the control performed by the controller 3 can also be performed, and the controller 3 is not required, and all the control in the normal state and abnormal state of the plant 1 can be performed with the same dedicated computer. It will be.

Example 4. In addition, in Examples 1 and 2,
In the operation abnormality information database 8 and the startup abnormality information database 14, electric signal values capable of recognizing all abnormal states that can occur in the plant 1 are described. However, when an abnormal state occurs, it is difficult to limit what value the electric signal sent from the plant state detector 2 has, and the operation abnormal information database 8 and the start abnormal information for all the abnormal states. It is difficult to describe in the database 14. Therefore, in the present embodiment, in the first and second embodiments, the operation abnormality information database 8 for each electric signal value from the plant state detector 2 when the plant 1 is in the normal state.
And the activation abnormality information database 14 are described. In this case, the abnormal state recognition unit 11 compares the electric signal value accumulated in the electric signal accumulating device 10 with the electric signal value described in the operation abnormality information database 8 or the start abnormality information database 14, and the electric signal value must match. If it is abnormal, it is recognized. As a method of recognizing an abnormal state, it is possible to select a method that makes it easy to describe an abnormal state by coexisting these two comparison methods.

[0017]

As is apparent from the above description, according to the present invention, when an abnormal state occurs in the plant during operation or startup, this abnormal state is recognized and the recognized abnormal state is dealt with. A method is searched for, and a drive command is generated based on the searched countermeasure, so that the abnormal state of the plant is automatically resolved, and it is not necessary to keep a trained operator on standby.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of a plant control apparatus according to the present invention.

FIG. 2 is a system configuration diagram showing a second embodiment of the plant control device according to the present invention.

FIG. 3 is a system configuration diagram showing a third embodiment of the plant control device according to the present invention.

FIG. 4 is a system configuration diagram showing a conventional plant control device.

[Explanation of symbols]

 1 Steel Plant 2 Plant State Detector 3 Controller 4 Application Program 8 Operation Abnormality Information Database 11 Abnormal State Recognition Unit 12 Abnormal State Coping Method Search Unit 13 Drive Command Generator 14 Startup Abnormality Information Database 11 'Operating State Recognition Unit 12' Operating condition coping method search unit 15 Operation information database

Claims (2)

[Claims] 1. A plant state detecting means for detecting a state of a plant, an abnormal state recognizing means for recognizing an abnormal state of the plant based on the plant state detected by the plant state detecting means, and various abnormal states in the plant. A coping method accumulating means for accumulating coping methods; a coping method searching means for searching a coping method for the abnormal condition recognized by the abnormal condition recognizing means from the coping methods accumulated in the coping method accumulating means; A plant control device comprising: a drive command generation unit that generates a drive command that changes the state of the plant based on the coping method retrieved by the method retrieval unit. 2. A plant state detecting means for detecting the state of the plant, an operating state recognizing means for recognizing the operating state of the plant based on the plant state detected by the plant state detecting means, and for various abnormal states in the plant. A first coping method accumulating means for accumulating coping methods, a second coping method accumulating means for accumulating coping methods for various normal states in the plant, and a coping method for the operating state recognized by the operating state recognizing means are provided. A coping method search unit for searching from the coping methods stored in the first and second coping method storage units, and a drive command for changing the state of the plant based on the coping method searched by the coping method search unit. And a drive command generating means for generating