JPH0720902A - Plant monitor device - Google Patents

Abstract

PURPOSE:To secure the continuity of plant monitoring after recovery even if the monitoring operation of the plant monitor device is interrupted. CONSTITUTION:When the plant monitor device 11 recovers from a fault, a logical expression which is triggered with plant data inputted to a monitor control part 12 from a plant 20 through a data read part 13 is selected in a logical expression storage part 17 corresponding to trigger information on respective logical expressions stored in a trigger tag information table 18. When plural logical expressions are selected, a logical expression having combination conditions of plant data which are already inputted and plant data to be inputted next is selected. Then, when plural logical expressions are still selected, the logical expression having the closest input elapse information to the input elapse time of each plant data which are already inputted is determined on the basis of plant data input elapse information at the time of past logical expression holding which is by logical expressions in a past result information storage part 19 and the plant is monitored according to this logical expression.

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 series of processes until completion of a target in various production plants and manufacturing plants.

[0002]

2. Description of the Related Art In a chemical treatment plant such as a chemical liquid production plant, for example, a raw material is subjected to various processing steps from the time when the raw material is put into the plant until the target chemical liquid is produced and the product is shipped. Move while being treated.

In a plant monitoring device using a computer system for tracking and monitoring the progress of work in various processes and movement between processes in such a plant, in order to recognize the end of various processes (event recognition), the plant monitoring device Based on the data such as digital information change and analog amount change data obtained from each sensor, it is recognized that the process is completed when the logical expression set corresponding to each process is established. .

For example, when the following logical expression is set in the plant monitoring device to monitor the treatment process for neutralizing the liquid and recognize the end of the neutralization process as an event, when all the conditions are satisfied Event occurrence is recognized by (AND condition).

[0005] That is, when digital information indicating "open" of the valve A is obtained from the plant to the plant monitoring device, the liquid level of the tank A and the ph concentration of the liquid are continuously monitored by using the digital information of the valve A "open" as a trigger. The above logical formula for the neutralization process step is set selectively, and "close" of the valve A → liquid level of the tank A "xxxxx mm"
When the liquid ph concentration “×. × to ×. ×” is sequentially recognized, an event is recognized as the end of the neutralization step.

That is, the plant monitoring device monitors the plant status by performing progress recognition and completion recognition of the process based on the logical expressions corresponding to each of various processes, and appropriately displaying them on a monitor or the like.

[0007]

However, in the above-described plant monitoring device, when a failure such as a power failure or a computer system failure occurs and the monitoring operation by the plant monitoring device is stopped, various operations from the plant are performed during that period. Since digital information and analog information will not be input,
Plant monitoring based on the above formula will also be interrupted,
After the recovery of the plant monitoring device, a deviation occurs between the plant monitoring status and the actual process progress status in the plant.

That is, for example, at the start stage of a certain plant process, if the plant monitoring device is in a stopped state and the digital information at the beginning of the process generated from the plant is not input, the logical expression triggered by the digital information is not selected. Therefore, the process monitoring cannot be performed even if the plant monitoring device is restored, and the continuity of the plant monitoring is impaired because the wrong logical expression is selected based on the plant information input during the process. There is.

The present invention has been made in view of the above problems,
To provide a plant monitoring device capable of ensuring the continuity of plant monitoring by selecting an accurate logical formula for plant monitoring after the system is restored, even if the plant monitoring operation is interrupted due to the stop of the computer system. With the goal.

[0010]

That is, a plant monitoring apparatus according to the present invention comprises a logical expression storage means for storing a plurality of logical expressions corresponding to each process for recognizing the end of each process in a plant, Corresponding to each of the plurality of logical expressions, past information storage means for storing the input progress information of the plant data when the process end is recognized by the logical expression in the past, and the plant input from the plant at the time of failure recovery First logical expression selecting means for selecting a logical expression having data as a recognition condition from a plurality of logical expressions stored in the logical expression storing means, and a plurality of logical expressions are selected by the first logical expression selecting means. If
Based on the input progress information of the past plant data stored in the past information storage means corresponding to each of the plurality of logical expressions, the past input progress information most approximate to the input progress information of the plant data from the current plant And a second logical expression selecting means for selecting a logical expression corresponding to.

[0011]

That is, when the present plant monitoring apparatus is restored from the stopped state due to a failure, the logical expression having the combination condition of each plant data input from the plant thereafter is first selected, and a plurality of logical expressions are still selected. When a logical expression is selected, the input of each plant data input from the current plant is performed based on the input progress information of the plant data when the previous logical expression is stored, which is stored in the past information storage means for each logical expression. One of the logical expressions having the input progress information that is the closest to the progress information is secondly selected, and thereafter, plant monitoring is performed according to this selection logical expression.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the construction of a plant monitoring device.

The plant monitoring device 11 is provided with a monitoring control unit 12 composed of a CPU and the like, and the monitoring control unit 12 controls the operation of each unit of the device.

A data read processing unit 13, a CRT device 14, and a printer 15 are connected to the monitoring control unit 12, and a plant current state storage unit 16 and a logical expression storage unit 1 are also provided.
7, the trigger Tag information table 18, and the past record information storage unit 19 are respectively connected.

The plant 20 whose process is monitored by the plant monitoring device 11 is a chemical treatment plant which produces another solid substance that can be reused through a number of processes using a used solid substance as a raw material. Processing liquid tank A,
Digital information and analog information such as the liquid level in B, ..., N, the temperature in the tank, the liquid concentration in the tank, the open / close state of the valve pump, etc. are read into the data reading processing unit 13 of the plant monitoring device 11 as various plant data. Be done.

In the plant current state storage section 16, the latest state data of each part of the plant that needs to be monitored inside the plant 20 is input to the monitoring control section 12 via the data reading processing section 13 for various plants. It is sequentially updated and stored according to the data.

The state data of each part of the plant which is stored and held in the plant state data storage unit 16 is read out to the monitor control unit 12 as necessary and output to the CRT device 14 and the printer 15.

The logical expression storage unit 17 stores in advance a large number of logical expressions corresponding to a large number of processing steps in the plant 20 for recognizing the progress status and the end of each step.

The trigger information of each of a number of logical expressions stored in the logical expression storage unit 17 is stored in the trigger Tag information table 18 and managed.

That is, the above-mentioned trigger Tag information table 1
In FIG. 8, storage addresses of the logical expressions in the logical expression storage unit 17 having the trigger information are stored in a table corresponding to the trigger information of each of a large number of logical expressions necessary for process monitoring of the plant 20. It

For example, when the trigger Tag information table 18 is searched for the trigger information that matches the plant data input to the monitoring control unit 12 via the data reading processing unit 13, the logic corresponding to the trigger information is retrieved. According to the address data of the expression storage unit 17, a logical expression using the above-mentioned input plant data as trigger information is selected and set in the monitoring control unit 12 as a logical expression for the current process monitoring.

In the past performance information storage unit 19, event recognition is performed by satisfying conditions during past process monitoring, corresponding to each of a large number of logical formulas stored in the logical formula storage unit 17. In this case, the time lapse t between each plant data input recognition is stored as past process monitoring history information.

For example, when inputting plant data to the monitoring control unit 12, when a plurality of trigger information are searched by the trigger Tag information table 18 and a plurality of logical expressions are selected corresponding thereto, after that, Based on the recognition progress status of each plant data input to the monitoring control unit 12 via the data reading unit 13 and the past process monitoring history information stored in advance in the past performance information storage unit 19, the plant process of this time One logical expression corresponding to is determined.

Then, when the event recognition of this step is performed based on the logical expression set in the monitoring control section 12, the contents of the plant are stored in the plant state data storage section 16 and stored in the plant. CR with status data
It is output to the T device 14 and the printer 15.

The history information of the logical expression used for the process monitoring this time is calculated as an average value with the history information of the same logical expression already stored in the past performance information storage unit 19, and the logical expression concerned is calculated. Is updated as new history information.

Next, the operation of the plant monitoring system having the above configuration will be described.

FIG. 2 is a timing chart showing an event recognition process accompanying the input of information from the plant when the plant monitoring apparatus is normal.

FIG. 3 is a diagram showing a logical expression applied to the event recognition processing of the plant monitoring apparatus.

That is, when the plant data from the plant 20 is input as digital information a to the monitoring control unit 12 via the data reading processing unit 13 of the plant monitoring device 11 at a certain timing T1, this digital information a is used as a main trigger. The process monitoring logical expression (X) is the trigger Ta
It is selectively set based on the g information table 18 and the logical expression storage unit 17, and the process monitoring process for event recognition is started.

At this time, the analog data a read from the plant 20 into the data reading processing unit 13 as one plant data is input to the monitoring control unit 12 at regular intervals and monitored.

Then, the plant status data stored in the plant current status storage unit 16 is updated in accordance with the digital information a and the analog data a input to the monitoring control unit 12.

After this, the timing T when the time t1 has passed
In step 2, when the plant data required for the process monitoring logical expression (X) is input as digital information b to the monitoring control unit 12 via the data reading processing unit 13 of the plant monitoring device 11, the digital information b causes the process Digital information a (AND) digital information b in the monitoring logic equation
It is recognized that some of the conditions are met.

At the same time, the plant status data stored in the plant current status storage unit 16 is updated according to the input digital information b.

Subsequently, at the timing T3 when the time t2 has elapsed from the timing T2 at which the digital information b was input and recognized, the plant data necessary for the process monitoring logical expression (X) is digital information c as the plant monitoring device 11
When it is input to the monitoring control unit 12 through the data reading processing unit 13 of the above, the digital information c is used to satisfy a partial condition of the digital information a (AND) digital information b (AND) digital information c in the process monitoring logical expression. Be recognized.

At the same time, the plant status data stored in the plant current status storage unit 16 is updated according to the input digital information c.

Then, at a timing T4 when a time t3 has elapsed from the timing T3 at which the digital information b was input and recognized, the analog information a input to the monitoring controller 12 at regular intervals is preset to an analog level. When it is confirmed that the value of “a” has been reached, the event “a” that the above logical expression (X) is established and the process is finished is recognized,
A message is output to the CRT device or printer 15.

In addition, when an event is recognized by the process monitoring, the input progress information of each plant data until the event a is generated corresponding to the process monitoring logical expression (X). The t1, t2, and t3 are stored and saved in the past performance information storage unit 19.

FIG. 4 is a timing chart showing an event recognition process accompanying the input of information from the plant when a failure occurs in the plant monitoring device.

That is, the timing T at which the plant monitoring device 11 is stopped due to a power failure or the like in the computer system.
In step 1, when the process similar to the above is started in the plant 20, the digital information a at the beginning of the process is generated.
Is not input to the process monitoring process.

After that, at timing T2 when the plant monitoring apparatus 11 is restored and is in the operating state, when the plant data is input as digital information b to the monitoring control section 12 via the data reading processing section 13 of the plant monitoring apparatus 11, A process monitoring logical expression using this digital information b as a main trigger or a sub-trigger is a trigger Tag information table 18.
Then, the process monitoring process for event recognition is started by selecting and setting based on the logical expression storage unit 17.

Here, a plurality of logical expressions using the digital information b as a main trigger or a sub-trigger may be selected, which allows a plurality of process monitoring logical expressions (for example, X, Y, Z) to be selected. When selected, the process monitoring process based on these three logical expressions (X, Y, Z) is started.

Then, a plurality of process monitoring logical expressions (X, Y,
When Z) is selected, the logical formula determination process for determining one logical formula that corresponds to the current plant process is activated.

That is, at the timing T3 when the time t2 has elapsed from the timing T2 at which the digital information b was input and recognized, the plant data is transferred to the monitoring control unit 12 as the digital information c via the data reading processing unit 13 of the plant monitoring apparatus 11. When inputted, first, a logical expression having a combination condition of the digital information b and the digital information c is selected for the three selected plural logical expressions (X, Y, Z).

Here, when there are still a plurality of logical expressions selected based on the input combination condition of the plant data (for example, X, Y), the progress from the recognition of the digital information b to the recognition of the digital information c. One logical expression (X) having the input progress information of the plant data that is the closest to the time t2 is determined based on the process monitoring history information for each logical expression stored in the past performance information storage unit 19 in advance. , Process monitoring is continued based only on this decision logic formula (X).

Then, the digital information b is input and recognized, and is input to the monitoring controller 12 at regular intervals at a timing T4 when a time t3 has elapsed from the timing T3 when the regular process monitoring logical expression (X) was determined. When it is confirmed that the analog information a to be stored has reached the preset analog level a, the event a that the above logical expression (X) is satisfied and this process end is recognized, and the CRT device or the printer is recognized. A message is output to 15.

In this case, further, based on the process monitoring history information of the logical formula (X) stored in the past performance information storage unit 19, the date and time of occurrence of the digital information a which is the main trigger of the logical formula (X). Is calculated back.

When an event is recognized by the process monitoring, the input progress information t1 and t2 of each plant data until the event a is generated corresponding to the process monitoring logical expression (X). , T3 are averaged and updated and stored with the process monitoring history information of the same logical expression (X) stored in advance in the past performance information storage unit 19.

Therefore, according to the plant monitoring apparatus having the above configuration, when the plant monitoring apparatus 11 is restored from the stopped state due to the failure, the plant 20 inputs the data to the monitoring control section 12 via the data reading section 13 thereafter. The logical expression for process monitoring using the generated plant data as the main trigger or the sub-trigger is set as the trigger Tag information table 18
When a plurality of logical expressions are selected from the logical expression storage unit 17 corresponding to the trigger information of each logical expression stored in, the input plant data and the next data are selected from the plural logical expressions. When a logical expression having a combination condition with the plant data input to is selected and a plurality of logical expressions are still selected, the past logical expression stored in the past performance information storage unit 19 for each logical expression is selected. Based on the input progress information of the plant data at the time of establishment, one logical expression having the input progress information that is most approximate to the input elapsed time t of the two plant data input to the monitoring control unit 12 is determined. Since the plant monitoring is performed according to the decision logic formula and the process end is recognized, the plant monitoring device 11 is in the stopped state and is generated from the plant 20 at the start stage of a certain plant process, for example. Extent not input initial plant data, even if the process monitoring expressions for the main trigger the plant data is not selected, the plant monitoring apparatus 11
After the restoration, the regular process monitoring logical expression corresponding to the current plant process is selected, and the continuity of plant monitoring can be ensured.

In the above embodiment, the chemical treatment plant has been described as the plant 20 to be monitored by the plant monitoring device 11, but the same applies to other various plants requiring process control. can do.

[0051]

As described above, according to the present invention, a logical expression storage means for storing a plurality of logical expressions corresponding to each step for recognizing the end of each step in a plant, and the plurality of logical expressions. The past information storage means for storing the input progress information of the plant data when the process end is recognized in the past by the logical expression corresponding to each of the above, and the plant data input from the plant at the time of failure recovery as the recognition condition. First logical expression selecting means for selecting a logical expression to be stored from a plurality of logical expressions stored in the logical expression storage means, and when a plurality of logical expressions are selected by the first logical expression selecting means, Based on the input progress information of the past plant data stored in the past information storage means corresponding to each of the plurality of logical expressions, the plant data input from the current plant is input. Since the system is provided with the second logical expression selecting means for selecting the logical expression corresponding to the past input progress information which is the closest to the progress information, the system is restored even when the plant monitoring operation is interrupted due to the stop of the computer system. Later, it becomes possible to select an accurate formula for plant monitoring and to ensure continuity of plant monitoring.

[Brief description of drawings]

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

FIG. 2 is a timing chart showing an event recognition process associated with information input from the plant when the plant monitoring device is operating normally.

FIG. 3 is a diagram showing a logical expression applied to an event recognition process of the plant monitoring device.

FIG. 4 is a timing chart showing an event recognition process accompanied by information input from the plant when a failure occurs in the plant monitoring device.

[Explanation of symbols]

11 ... Plant monitoring device, 12 ... Monitoring control unit, 13 ... Data reading processing unit, 14 ... CRT device, 15 ... Printer, 16 ... Plant current state storage unit, 17 ... Logical expression storage unit, 18 ... Trigger Tag information table, 19 ... Past performance information storage unit, 20 ... Plant.

Claims (1)

[Claims] 1. A logical formula storage means for storing a plurality of logical formulas corresponding to each process for recognizing the end of each process in a plant, and a logical formula corresponding to each of the plurality of logical formulas. The past information storage means for storing the input progress information of the plant data when the process end is recognized in the past, and the logical expression storage means for storing the logical expression having the plant data input from the plant at the time of failure recovery as the recognition condition First logical expression selecting means for selecting from a plurality of stored logical expressions, and when a plurality of logical expressions are selected by the first logical expression selecting means, corresponding to each of the plurality of logical expressions Based on the input progress information of the past plant data stored in the past information storage means, the past that most approximates the input progress information of the plant data from the current plant. And a second logical expression selecting means for selecting a logical expression corresponding to the input progress information of the plant, and the process monitoring is performed by selecting the logical expression corresponding to the current process after the failure recovery. apparatus.