JPH06250733A - Plant controller - Google Patents

Abstract

PURPOSE:To provide the plant controller which efficiently analyzes abnormality and is high in reliability by providing a means which stores enough information to analyze occurring abnormality and easily and securely offers the information. CONSTITUTION:The plant controller has a fault storage device 14 which stores abnormality information and an event storage device 19 which stores event information operated from outside through a man-machine interface part 15. When abnormality occurs and is analyzed, its information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant controller used as a sequence controller for power generation.

[0002]

2. Description of the Related Art A plant control device for electric power generation has a diagnostic function for monitoring the operating state of a plant for the purpose of maintenance. The diagnostic function of the conventional plant control device will be described with reference to FIGS. 4 and 5. FIG. 4 is a block diagram showing the configuration of a conventional plant control device, and 11 is a microprocessor that controls the entire device. 12
Is a main storage device for storing various information such as a control program and a diagnostic program. Reference numeral 13 is a diagnostic circuit for checking whether or not the plant is operating normally. 1
Reference numeral 4 is a failure storage device that stores abnormality information when the diagnosis circuit 13 detects an abnormality. Reference numeral 15 denotes a man-machine interface unit for exchanging data with the outside of the apparatus such as providing various information to the user and receiving operation commands. Input / output devices such as a display device 17 and a keyboard device 18 are connected to the man-machine interface section. Using the connected input / output device, the control program stored in the main storage device 12 can be modified and changed. Reference numeral 16 is a clock circuit for managing the time.

During operation of the plant control device, the diagnostic circuit 1
When 3 detects an abnormality, the microprocessor 11
Information about an abnormal state is stored in the failure storage device 14.
An example of the stored abnormality information is shown in FIG. Failure storage device 1
4 stores an abnormality occurrence time sent from the clock circuit 16 and an abnormality type such as detection of a memory parity error or an undefined instruction sent from the diagnostic circuit 13. When analyzing the cause of the abnormality, the input / output devices of the display device 17 and the keyboard device 18 connected to the man-machine interface unit 15 are used to read the information in the failure storage device 14.

[0004]

By the way, in recent years, centralized control is in progress in plant control devices. Due to the increase in speed of microprocessors and the increase in capacity of storage devices, there is a tendency for a single device to execute control that was conventionally performed by a plurality of devices. In this way, as one device becomes multifunctional, the cause of the abnormality has become widespread. In this case, there is a problem in that it is difficult to perform efficient analysis only with the conventional abnormality related information as shown in FIG. In order to solve the above problems, the present invention provides a plant control device capable of obtaining sufficient new information to efficiently analyze an abnormality that has occurred.

[0005]

In order to achieve the above object, a plant control apparatus of the present invention manages the time, a microprocessor for controlling the entire apparatus, a main memory for storing programs and various information. A clock circuit, a diagnostic means for monitoring the operating state of the plant, a failure storage means for storing abnormal information of the operation detected by the diagnostic means, an input / output means for exchanging data with the outside of the device, and an input from the outside of the device. It is characterized by comprising event storage means for storing event information executed via the output means.

[0006]

In the plant control device of the present invention, in addition to the failure information, various event information operated from the outside that may be one factor that causes an abnormality is held in the event storage means. When an abnormality occurs, the cause is sought by referring to the failure information and the event information when analyzing the abnormality.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals.

FIG. 1 is a block diagram showing the configuration of an embodiment of the plant control apparatus of the invention. In FIG. 1, reference numeral 19 is an event storage device for storing event information operated by the input / output devices 17 and 18 from outside the device. Reference numeral 20 is a reset switch connected to the man-machine interface unit 15. The reset switch 20 is a switch for restarting the plant control device by a user operation when the plant control device does not operate normally and is in a failure state. Reference numeral 21 is a communication interface, which is a connection unit with the host system 22. Next, the operation of this embodiment will be described.

For example, when an operation is performed by the user via the display device 17 and the keyboard device 18, the microprocessor 11 stores the time when the operation is performed and the operation type in time series in the event storage device 19. .

An example of the stored event storage device is shown in FIG. Operation information from outside the plant control device is stored in the order of occurrence time. An example of the event type will be described.
Event type 1 is a program change and is a case where the user rewrites the program. Event type 2 is the operation of the reset switch, which is a case where the user restarts by pressing the reset switch, such as when the device does not operate normally and is in a failure state. Event type 3 is the disconnection of the maintenance tool, which determines the operation mode such as changing the memory contents or putting the device in the standby state.
This is the case when a change is made. Event type 4 is a reset command from the host system, and is a case where a restart command is received from the centralized monitoring system in the central operation room. The event operation as described above is just an example, but it may cause the above occurrence. Further, as in the past, when a failure occurs, the microprocessor 11 causes the failure storage device 14 to
The abnormality occurrence time and the abnormality type are stored in.

Next, an example of cause analysis of the abnormality after the abnormality has occurred will be described. FIG. 3 shows the information contents stored in the failure storage device 14 and the event storage device 19. The failure storage device 14 indicates that "an undefined instruction was detected in the program a on February 2, 1992". The detection of an undefined instruction here means that there is an instruction code that the microprocessor 1 cannot judge. Possible causes of this abnormality include a hardware defect due to a defect of a storage element that stores the program and a software defect due to a program bug. Here, the contents of the event storage device 19 are referred to. The information that "the program b was changed on January 1, 1992" is stored and can be utilized as the above-mentioned abnormality related information. Therefore, by checking the relationship between the programs a and b, and for example, if the program a is temporarily affected by the program b under a certain specific condition, the occurrence of the undefined instruction of the program a causes the change of the program b. It was easy to get a clue that it was due. In this way, the cause of the abnormality can be easily clarified by the information in the event storage device 19.

[0012]

As described above, according to the present invention,
Since the abnormality can be efficiently analyzed by having means for easily and surely storing sufficient information for analyzing the generated abnormality, it is possible to provide a highly reliable plant control device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a plant control apparatus according to an embodiment of the invention.

FIG. 2 is a diagram showing the contents of an event storage device of the invention.

FIG. 3 is a diagram showing the contents of a failure storage device and an event storage device according to an embodiment of the invention.

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

FIG. 5 is a diagram showing the contents of a conventional failure storage device.

[Explanation of symbols]

 11 ... Microprocessor 12 Main memory 13 Diagnostic circuit 14 Fault memory 15 Man-machine interface 16 Clock circuit 17 Display 18 Display 18 Keyboard device 19 ......... Event storage device

Claims (1)

[Claims] 1. A microprocessor for controlling the entire apparatus, a main storage device for storing programs and various kinds of information,
A clock circuit for managing the time, a diagnostic means for monitoring the operating state of the plant, a failure storage means for storing abnormal information of the operation detected by the diagnostic means, and an input / output means for exchanging data with the outside of the device. A plant control device for storing command information executed from outside the device via the input / output device.