JPH07129232A - Plant monitor device - Google Patents

Abstract

PURPOSE:To prevent the automatic operation of a plant from being interrupted owing to transient trouble by offering the control state and tendency of the plant in the automatic operation to an operator in the plant monitor device. CONSTITUTION:A process quantity from the plant is inputted to an input monitor part 2 through an input processing part 1 and compared with an alarm set value 21 in a set value storage part 3, and the comparison result is sent to a plant control unit through an output processing part 4 to control the plant and also displayed on a display device 6 through 6 display processing part 5. The plant monitor device 10 consists of a history data storage part 11 which stores data from the input processing part 1 as history data and a predicted value arithmetic part 12 which finds a predicted value of the process quantity from the history data and inputs it to the display processing part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant monitoring device for monitoring a plant condition and controlling automatic plant operation.

[0002]

2. Description of the Related Art FIG. 15 shows a plant monitoring device for monitoring a plant state and controlling automatic plant operation, FIG. 16 is a flow chart, and FIG. 17 is a display example. In the conventional plant monitoring apparatus 10, first, the process amount from the plant is input by the input processing unit 1. The process amount input by the input processing unit 1 is sent to the input monitoring unit 2, and the data sent from the input processing unit 1 is sent to the display processing unit 5. The display processing unit 5 displays the data from the input monitoring unit 2 on the display device 6 to notify the operator.

A display example will be described in the case where the relationship between the reactor output and the core flow rate, which is essential for the operation of a nuclear power plant, is monitored. In this display, the preset limit value is displayed, and the horizontal axis shows the core flow rate and the vertical axis shows the current value by the dot or marker display on the screen represented by the reactor power.

On the other hand, in parallel, the input monitoring unit 2 takes out the alarm set value 21 stored in advance in the set value storage unit 3 and compares it with the sent process amount. Here, since the alarm set value 21 is an alarm limit value for the sent process amount, there is an upper limit value or a lower limit value for the process amount, but here it will be described as an upper limit value.

When the comparison result indicates that the process amount does not exceed the alarm set value 21, the set value storage unit 3 notifies the output processing unit 4 that the plant state is normal. or,
If the process amount exceeds the alarm set value 21 as a result of comparison, the set value storage unit 3 notifies the output processing unit 4 that the plant is abnormal. When the output processing unit 4 is notified by the setting value storage unit 3 that the plant is abnormal, the output processing unit 4 sends a command to exclude automatic in order to forcibly stop the automatic control of the plant to the plant control device 50. To do. Plant control device 50 that received the exclusion command
Immediately transfers control to manual mode.

[0006]

In the above-mentioned conventional plant monitoring apparatus, the operator can know only the current value by monitoring while the plant is operating, and the trend of the process amount cannot be grasped. There is a problem that I do not know whether it is going to be safe or not.

On the other hand, there is a problem in that even if there is an abnormality in the plant due to a temporary trouble or the like, the automatic operation is stopped, and continuous automatic operation of the plant cannot be performed. Further, there is also a problem that when the automatic operation is stopped due to a plant abnormality, the operator has no choice but to make a decision in order to continue the automatic operation again.

The present invention has been made to solve the above problems and provides the operator with the control state and trends of the plant during automatic plant operation, and further interrupts the automatic plant operation due to a temporary trouble. It is an object of the present invention to provide a plant monitoring device for monitoring so as not to let it happen.

[0009]

A plant monitoring apparatus according to [Claim 1] of the present invention is provided with a history data storage unit 11 for storing the process amount input from a plant as history data 23 at any time, The present invention is characterized in that the history data 23 and the current value of the process amount from the input processing unit 1 are used to predict the future trend of the plant and to provide a predicted value calculation unit 12 for notifying the operator of the state of the plant.

In the plant monitoring apparatus according to [Claim 2] of the present invention, a pre-alarm set value 22 is provided before the alarm set value 21 in addition to the alarm set value 21 stored in the set value storage unit 3. The input monitoring unit 2 determines the pre-alarm setting value 22 to include a HOLD determination processing unit 13a that notifies the operator that the plant state is approaching the alarm setting value 21. .

In the plant monitoring apparatus according to [Claim 3] of the present invention, in addition to the alarm set value 21 stored in the set value storage unit 3, a pre-alarm set value 22 is provided before the alarm set value 21. The input monitoring unit 2 determines the pre-alarm setting value 22 to provide a restart determination processing unit 13b for notifying the operator that the plant operation can be performed from the plant state in the HOLD state. It is characterized by

According to the result of the set value storage unit 3, the plant monitoring apparatus according to [Claim 4] of the present invention automatically operates the HO of the plant control apparatus 50 during the automatic operation of the plant.
LD command output judgment, plant automatic operation HOLD
An alarm state determination control unit 13 that determines the output of the restart instruction of the automatic operation to the plant control device 50 inside is provided.

The plant monitoring apparatus according to [Claim 5] of the present invention has a function of displaying the present and future movements based on the results obtained by the means of [Claim 1] to [Claim 4]. A state change data storage unit 14 for storing the state of plant control is provided.

[0014]

[Action]

According to the structure of [Claim 1], the process amount input by the input processing unit is stored in the history data storage unit as history data for a certain period of time, and the predicted value calculation unit calculates the predicted value from the stored data. Therefore, the operator can grasp the tendency of the plant state from the predicted value.

According to the structure of [Claim 2], the pre-alarm set value is stored in the set value storage unit in advance, the process amount input in the input processing unit and the pre-alarm set value are compared in the input monitoring unit, and the pre-alarm set value is compared. Depending on the result, the HOLD determination processing unit
It is determined whether or not it should be OLD, and if necessary, a HOLD command is sent to the plant control device via the output processing unit. Therefore, since the automatic plant operation can be held by the pre-alarm by the pre-alarm, useless stop of the automatic operation can be prevented and the load on the operator can be reduced.

According to the configuration of [Claim 3], the pre-alarm set value is stored in advance in the set value storage unit, the process amount input in the input processing unit and the pre-alarm set value are compared in the input monitoring unit, and the pre-alarm set value is compared. Based on the result, the restart determination processing unit determines whether or not to restart the automatic operation, and if necessary, sends a restart command to the plant control device via the output processing unit. Therefore, if the automatic operation is stopped or [Claim 2] is issued, the HOL
In the D state, even if the operator does not constantly monitor the plant, the operator can monitor the plant state automatically and notify the operator that automatic operation can be restarted, thereby reducing the load on the operator. can do.

According to the structure of [Claim 4], the alarm status judging section judges what to do with the status of the automatic plant operation based on the result of the comparison by the input monitoring section, and outputs the command signal suitable for the situation to the plant control apparatus. Can be sent to.
Therefore, stable automatic operation can be realized and the load on the operator can be reduced by being able to automatically repeat [claim 2] and [claim 3].

According to the structure of [Claim 5], the history data is sent to the display processing unit, the information of the automatic plant operation is stored in the state change data storage unit, and the history data and the state change data are used to display the data. The history, predicted value, and status change can be displayed on. This allows the operator to understand what the plant condition is,
Further, it is possible to accurately judge the movement of the automatic plant operation.

[0019]

1 is a diagram showing an embodiment of a plant monitoring apparatus according to [Claim 1] of the present invention. The same reference numerals as those in FIG. 15 indicate the same or corresponding portions. The difference between this embodiment and FIG. 15 is that a history data storage unit 11 for storing the data input by the input processing unit 1 in the plant monitoring apparatus 10 as history data 23 and the stored history data 23. The point is that a prediction value calculation unit 12 that performs a prediction value calculation using the current value input by the input processing unit 1 is provided.
Others are the same as in FIG.

Next, the operation will be described. Here, as one embodiment according to [Claim 1] of the present invention, description will be given assuming that the relationship between the reactor output and the core flow rate, which is essential for the operation of a nuclear power plant, is monitored. FIG. 2 shows a flowchart of an embodiment according to [claim 1].

In the figure, the input processing unit 1 reads the reactor output and the core flow rate from the plant at regular intervals (S
101). The input processing unit 1 stores the read data in the history data storage unit 11 as needed (S102). Here, the reactor output data is CTP and the core flow rate data is WD.
Then, as shown in FIG. 10A, the history data storage unit 11 becomes one data with two words such as CTP for the first word and WD for the second word. The data is sequentially stored in time series to form history data 23 as shown in FIG. Here, the history data 23 is a file of a fixed amount of 2 m words, and by setting the pointer 31 of the latest data, it is possible to determine where the latest data is, and each time the data is updated, the latest data is updated. The pointer 31 is also updated. Here, the n-th data is taken as the latest data, and the reactor power and core flow rate are computed by CT.
Assuming P (n) and WD (n), the CTP is set at the address P indicated by the pointer 31 as shown in FIG.
WD (n) is present at (n) and P + 1.

The input processing unit 1 notifies the predicted value calculation unit 12 that the above data storage has been completed (S103). The predicted value calculation unit 12 extracts an arbitrary number of history data within a fixed time from the latest data from the history data 23 stored in the history data storage unit 11 (S104), and calculates the rate of change of each of the reactor power and the core flow rate. This is calculated using the least squares method
From the value parameter, the tendency of the direction in which the plant is going to proceed is obtained (S105). Hereinafter, this value will be referred to as a predicted value.

The predicted value calculation unit 12 which has calculated the predicted value sends data of an arbitrary time out of the predicted value and the data of the history data 23 stored in the history data storage unit 11 to the display processing unit 5 (S106). ), The display processing unit 5 displays the display device 6
A history output and a predicted value output are performed (S107), and the operator is notified, so that the movement and trend of the plant can be quickly recognized.

FIG. 3 is an apparatus diagram showing an embodiment of the plant monitoring apparatus according to [Claim 2] of the present invention. The same reference numerals as those in FIG. 15 indicate the same or corresponding portions. The difference between this embodiment and FIG. 15 is that the pre-alarm set value 22 for monitoring the pre-alarm stored in the set value storage unit 3 in advance and the output processing based on the result monitored by the input monitoring unit 2 are performed. The point is that a HOLD determination processing unit 13a for determining whether or not to hold the plant control device with respect to the unit 4 is provided. Others are the same as in FIG.

Next, the operation will be described. As an example according to [Claim 2] of the present invention, description will be made assuming that the relationship between the reactor output and the core flow rate, which is essential for the operation of the nuclear power plant, is monitored in the same manner as above. FIG. 4 shows a flowchart of an embodiment according to [claim 2].

In the figure, an input flow rate unit 1 reads a reactor output and a core flow rate from a plant in a constant cycle ((S101). The input flow rate unit 1 inputs the read reactor output and the core flow rate to an input monitoring unit 2. (S201) The input monitoring unit 2 that has received the reactor output and the core flow rate retrieves the alarm set value 21 and the pre-alarm set value 22 stored in the set value storage unit 3 from the set value storage unit 3 ( S2
02). Here, in the case of the binary process amount according to the present embodiment, one of the process amounts is used as a reference, and the other process amount is compared with the alarm set value 21 and the pre-alarm set value 22. In this embodiment, the core flow rate will be described as a reference. Further, in the reactor output and the core flow rate used in the present embodiment, the alarm set value 21 and the pre-alarm set value 22 of the reactor output are variable depending on the value of the core flow rate. 22
In the input monitoring unit 2, the alarm set value 21 and the pre-alarm set value 22 are obtained by the equation such as Y = a * X + b as shown in FIG. 11 (S203).

Input monitoring unit 2 for comparison (S204)
Shows the comparison result as a contact signal in the HOLD determination processing unit 13a.
To (S205). The HOLD determination processing unit 13a that has received the signal determines from the comparison result which set value has been exceeded (S206), and if it has exceeded the pre-alarm set value 22, the output processing unit 4 sends the pre-alarm set value 2
Notifying that the number exceeds 2 (S207). Upon receiving the notification, the output processing unit 4 outputs a HOLD command for automatic operation to the plant control device 50 (S208), and sets the plant automatic operation in the HOLD state, thereby preventing the unnecessary automatic plant operation from being excluded. be able to. or,
On the other hand, the comparison result is sent to the display processing unit 5, and the display device 6
(S209), the operator can be quickly notified of the plant abnormality.

FIG. 5 is a diagram showing an embodiment of the plant monitoring apparatus according to [Claim 3] of the present invention. The same reference numerals as those in FIG. 15 indicate the same or corresponding portions. The difference between the present embodiment and FIG. 15 is that the pre-alarm set value 22 for monitoring the pre-alarm stored in the set value storage unit 3 in advance.
And the output processing unit 4 based on the result monitored by the input monitoring unit 2.
On the other hand, it is provided with a restart determination processing unit 13b that determines whether or not to restart the plant control device. Other configurations are similar to those in FIG.

Next, the operation will be described. Also in [Claim 3] of the present invention, it is assumed that the relationship between the reactor output and the core flow rate, which is essential for the operation of the nuclear power plant, is monitored in the same manner as described above. FIG. 6 shows a flowchart of an embodiment according to [Claim 3].

In the figure, the input processing unit 1 reads the reactor output and the core flow rate from the plant at regular intervals (S
101). The input processing unit 1 sends the read reactor output and core flow rate to the input monitoring unit 2 (S201). The input monitoring unit 2, which has received the reactor output and the core flow rate, retrieves the alarm set value 21 and the pre-alarm set value 22 stored in the set value storage unit 3 from the set value storage unit 3 (S202).
Here, in the case of the binary process amount according to the present embodiment, one of the process amounts is used as a reference, and the other process amount is compared with the alarm set value 21 and the pre-alarm set value 22. Further, in the reactor output and the core flow rate used in this embodiment, the reactor output alarm set value 21 and the pre-alarm set value 22 are variable depending on the value of the core flow rate. This method is the same as in [claim 1] (S
203).

Input monitoring unit 2 for comparison (S204)
Sends the comparison result as a contact signal to the restart determination processing unit 13b (S305). Resumption determination processing unit 13 that has received the signal
Based on the comparison result, b determines which of the alarm states has been recovered (S306), and if it is within the pre-alarm set value 22, notifies the output processing unit 4 of the recovery from the pre-alarm state (S307). . Upon receiving the notification, the output processing unit 4 outputs a restart command for automatic operation to the plant control device 50 (S308), and the automatic plant operation can be restarted automatically. On the other hand, by sending the comparison result to the display processing unit 5 and displaying it on the display device 6 (S209), the operator can be quickly notified that the plant has returned to normal.

FIG. 7 is a diagram showing an embodiment of the plant monitoring apparatus according to the present invention [claim 4]. The same reference numerals as those in FIG. 15 indicate the same or corresponding portions. The difference between this embodiment and FIG. 15 is that the output processing unit 4 is set to the H level for the plant control device based on the result monitored by the input monitoring unit 2.
The point is that an alarm state determination control unit 13 that determines OLD and restart command output is provided. Others are the same as in FIG.

Next, the operation will be described. Also in [Claim 4] of the present invention, it is assumed that the relationship between the reactor output and the core flow rate, which is indispensable for the operation of the nuclear power plant, is monitored in the same manner as described above. FIG. 8 shows a flowchart of an embodiment according to [claim 4].

In the figure, the input processing unit 1 reads the reactor output and the core flow rate from the plant at regular intervals (S
101). The input processing unit 1 sends the read reactor output and core flow rate to the input monitoring unit 2 (201). The input monitoring unit 2 that has received the reactor output and the core flow rate has a preset value storage unit 3 in advance.
The alarm setting value 21 and the pre-alarm setting value 22 stored in the setting value storage unit 3 are retrieved from the setting value storage unit 3 (S202). Here, in the case of the binary process amount according to the present embodiment, one of the process amounts is used as a reference, and the other process amount is compared with the alarm set value 21 and the pre-alarm set value 22. In this embodiment, the core flow rate will be described as a reference. Further, in the reactor output and the core flow rate used in this embodiment, the alarm output value 21 and the pre-alarm set value 22 of the reactor output are variable depending on the value of the core flow rate (S20).
3).

Input monitoring unit 2 for comparison (S204)
Shows the comparison result as a contact signal in the alarm state determination control unit 1
3 (S405). Upon receiving the signal, the alarm state determination control unit 13 determines whether to hold or exclude the plant automatic operation during the plant automatic operation according to the comparison result, or when the plant automatic operation is interrupted or stopped. Determines whether to restart the plant automatic operation (S406) and notifies the output processing unit 4 of the result (S407). Upon receiving the notification, the output processing unit 4 outputs a HOLD for automatic operation or a restart command to the plant control device 50 (S409). By automatically repeating the above operation, automatic plant operation can be automatically continued. On the other hand, the comparison result is sent to the display processing unit 5 (S408) and displayed on the display device 6 (S4).
By doing so, it is possible to notify the operator of how the automatic plant operation is performing.

FIG. 9 is a diagram showing an embodiment of the plant monitoring apparatus according to [Claim 5] of the present invention. The same reference numerals as those in FIG. 15 indicate the same or corresponding portions. The present embodiment is different from FIG. 15 in that a history data storage unit 11 for storing the data input by the input processing unit 1 in the plant monitoring apparatus 10 as history data 23 and the stored history data 23. Based on the result of monitoring by the predicted value calculation unit 12 that performs the predicted value calculation using the current value input by the input processing unit 1 and the input monitoring unit 2, the output processing unit 4 holds the HOLD for the plant control device and The point is that an alarm state determination control unit 13 for determining the restart command output and a state change data storage unit 14 for storing the state change of the automatic plant operation mode are provided. Others are the same as in FIG.

Next, the operation will be described. Similarly to the above, in [Claim 5] of the present invention, description will be made assuming that the relationship between the reactor output and the core flow rate, which is essential for the operation of the nuclear power plant, is monitored.

In the figure, the predicted value calculation unit 12 sends the predicted value and history data obtained by the method of [claim 1] to the display processing unit 5. Further, the alarm state determination control unit is [claim 5].
Each time a command signal is output to the plant control device 50 obtained by the above method, it is stored in the state change data storage unit as the state change data 51 as shown in FIG. The state change data forms one time data with one word, and has a 4-bit configuration in which 1/0 represents the time when the change occurs and the presence or absence of output of the four types of command signals 52, 53, 54, 55. The display processing unit 5 that has received the respective data displays a screen as shown in FIG. 12 on the display device 6. As shown in FIG. 12, the display of the predicted value provides future parameter movement by displaying the direction of the predicted value obtained in [claim 1] on the display of the current value 202 with an arrow 203 or the like.

Next, regarding the history display, a trajectory from a certain time to the current value is drawn on the history data for a certain time as a curve 201 shown in FIG. In addition, the operating state of the plant control device is displayed on the history data by changing colors. Here, the state change data 51 is HO at time T ₁ as shown in FIG.
It is assumed that the LD command signal is output and the restart signal is output at time T ₂ . Since the automatic plant operation is in operation until time T ₁ , as shown in FIG. 14, white is displayed until time T ₁ on the trend display.
Since HOLD command at time T ₁ from ₁ to time T ₂ are output, the time T ₁ on the trend display as shown in FIG. 14
From time T ₂ to time T ₂ is displayed in yellow. In addition, automatic operation from time T ₂ to white display the trend from the time T ₂ because it is resumed.

By combining and displaying the data of [Claim 1] and the data of [Claim 5] by the above method, the operator can be notified of the movement of the plant promptly.

The technique described above can be applied to all important inputs other than the reactor power and core flow shown in the embodiments. Further, the predicted value display can also be performed on a general trend screen. Further, in the present embodiment, the plant monitoring device and the plant control device are divided, but it is applicable to a device including both.

[0042]

As is apparent from the above description, according to the present invention, the movement of the important parameter to be monitored can be sufficiently grasped, and the automatic plant operation can be smoothly performed. The load on the operator can be reduced.

According to the embodiment of claim 1,
The movement and trend of plant operation can be grasped, the load on the operator can be reduced and the plant abnormality can be detected early. Further, according to the embodiment according to [Claim 2], it is possible to carry out the plant automatic operation without stopping due to a transient abnormality of the plant or the like, and it is possible to reduce the load on the operator. Further, according to the embodiment of [Claim 3], it becomes possible to restart the plant automatic operation in the stopped state without any monitoring by the plant status operator, and it is possible to reduce the load on the operator. Further, according to the embodiment of claim 4, the movement and trend of the plant operation can be grasped, and the automatic plant operation can be automatically continuously carried out, thereby reducing the load on the operator. Also, smooth automatic operation of the plant can be performed. Further, according to the embodiment of [Claim 5], the movement and trend of the plant operation can be grasped, the load on the operator can be reduced and the plant can be automatically operated smoothly.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment according to [claim 1] of the present invention.

FIG. 2 is a flowchart of an embodiment according to [claim 1] of the present invention.

FIG. 3 is a configuration diagram of an embodiment according to [claim 2] of the present invention.

FIG. 4 is a flowchart of an embodiment according to [claim 2] of the present invention.

FIG. 5 is a configuration diagram of an embodiment according to [claim 3] of the present invention.

FIG. 6 is a flowchart of an embodiment according to [claim 3] of the present invention.

FIG. 7 is a configuration diagram of an embodiment according to [claim 4] of the present invention.

FIG. 8 is a flowchart of an embodiment according to [claim 4] of the present invention.

FIG. 9 is a configuration diagram of an embodiment according to [claim 5] of the present invention.

FIG. 10 is a configuration diagram of history data.

FIG. 11 is an explanatory diagram of an alarm set value and a pre-alarm set value.

FIG. 12 is a display example of the present invention.

FIG. 13 is a configuration diagram of state change data.

FIG. 14 is an explanatory diagram of trend color change.

FIG. 15 is a configuration diagram of a conventional plant monitoring device.

FIG. 16 is a flowchart of a conventional plant monitoring device.

FIG. 17 is an example of a screen of a conventional plant monitoring device.

[Explanation of symbols]

 1 Input Processing Unit 2 Input Monitoring Unit 3 Setting Value Storage Unit 4 Output Processing Unit 5 Display Processing Unit 6 Display Device 10 Plant Monitoring Device 11 History Data Storage Unit 12 Prediction Value Calculation Unit 13 Alarm State Judgment Control Unit 14 State Change Data Storage Unit 21 Alarm set value 22 Pre-alarm set value 23 History data

Claims (5)

[Claims] 1. A process control from a plant is input to an input monitoring unit via an input processing unit and compared with an alarm set value stored in a set value storage unit, and the result is sent via an output processing unit to plant control. In a plant monitoring device that transmits the data to the device to control the plant and displays the comparison result on the display device via the display processing unit, a history data storage unit that stores the data from the input processing unit as history data. And a predicted value calculation unit that calculates a predicted value of the process amount based on the history data and inputs the predicted value to the display processing unit. 2. The process amount from the plant is input to the input monitoring unit via the input processing unit and compared with the alarm set value stored in the set value storage unit, and the result is passed through the output processing unit to control the plant. In a plant monitoring device that transmits a comparison result to a device to control a plant and displays the comparison result on a display device via a display processing unit, a set value storage unit that saves a pre-alarm set value in addition to the alarm set value. And a comparison result between the data input by the input processing unit and the pre-alarm setting value, it is determined whether or not the plant automatic operation is held by the plant control device, and the determination result is input to the output processing unit. And a HOLD determination processing unit that operates. 3. A process control from a plant is input to an input monitoring unit via an input processing unit and compared with an alarm set value stored in a set value storage unit, and the result is sent via an output processing unit to plant control. In a plant monitoring device that transmits a comparison result to a device to control a plant and displays the comparison result on a display device via a display processing unit, a set value storage unit that saves a pre-alarm set value in addition to the alarm set value. And, comparing the data input by the input processing unit with each of the set values, it is determined whether or not to restart the plant automatic operation with respect to the plant control device in which the plant automatic operation is in the HOLD state or the suspended state. And a restart determination processing unit that inputs the determination result to an output processing unit. 4. A process control from a plant is input to an input monitoring unit via an input processing unit and compared with an alarm set value stored in a set value storage unit, and the result is sent via an output processing unit to plant control. In a plant monitoring device that transmits a comparison result to a device to control a plant and displays the comparison result on a display device via a display processing unit, a set value storage unit that saves a pre-alarm set value in addition to the alarm set value. And, comparing the data input by the input processing unit with each of the set values, makes a determination for continuously operating the plant automatic operation with respect to the plant control device, and inputs the determination result to the output processing unit. A plant monitoring device, comprising: 5. A process amount from a plant is input to an input monitoring unit via an input processing unit and compared with an alarm set value stored in a set value storage unit, and the result is passed through an output processing unit to control a plant. In a plant monitoring device that transmits the data to the device to control the plant and displays the comparison result on the display device via the display processing unit, a history data storage unit that stores the data from the input processing unit as history data. A predicted value calculation unit that obtains a predicted value of the process amount based on the history data and inputs the predicted value to the display processing unit;
In addition to the alarm set value, a set value storage unit that saves a pre-alarm set value is compared with the data input by the input processing unit and each of the set values, and continuous automatic plant operation is performed for the plant control device. Make a decision to drive
A determination control unit for inputting the determination result to the output processing unit, and a state change data storage unit for storing the plant control state sent from the determination control unit and inputting to the display processing unit. Plant monitoring equipment.