JP7313291B2 - PLANT CONTROLLER, PLANT MONITORING DEVICE USING THE SAME, DATA COLLECTOR, AND PLANT CONTROLLER SIMULATOR - Google Patents

Description

The present application relates to a plant control device, a plant monitoring device using the same, a data collection device, and a plant control device simulator.

In a plant control system that monitors and controls plants including factories, it is effective to quickly detect failures that have occurred in manufacturing equipment and industrial equipment that make up the plant and their signs, and to repair the failure points at a stage when the impact on the entire plant is small. This is effective in reducing maintenance costs.

Therefore, a plant monitoring apparatus has been proposed that searches for equipment related to abnormal plant data when abnormal plant data is detected from equipment in the plant (Patent Document 1).
In addition, a monitoring device has been proposed that performs a process simulation in parallel with the operation of the actual plant and estimates the effect on the actual plant (Patent Document 2).

Japanese Unexamined Patent Application Publication No. 2011-221601 JP 2010-244159 A

The plant monitoring device described in Patent Literature 1 searches for related equipment after detecting abnormal plant data, and does not directly monitor abnormalities that have occurred in the equipment that constitutes the plant.
The plant operation support device described in Patent Literature 2 predicts characteristics in advance by simulation, and cannot identify anomalies that occur in actual plant equipment.

The present application has been made to solve the problems described above, and an object of the present invention is to provide a plant control device that can detect the influence of an event in synchronization with the progress of an operation command for controlling the plant and directly specify the effect.

The plant control device of the present application isIt has an input/output unit, a control unit, and a communication processing unit, and calculates input data from the controlled deviceA control logic in which a plurality of operation instructions are arranged in succession, and operation data which is the operation result of the operation instruction and incidental information which complements the operation data are propagated from the preceding stage to the present stage, and from the present stage to the next stage of the operation instruction.What is in the control unitand propagated from the previous stage to this stageAmong the multiple calculated data,the first incidental information of the first calculated data comprises an identification indicator indicating that the first calculated data is affected by the eventHowever, in the case of an operation instruction that can determine the third operation data in the next stage from the second operation data that is not affected by the event among the other operation data, the identification mark is not added to the third incidental information of the third operation data.It is characterized by

The plant control device of the present application can detect that operation data is affected by an event in synchronization with an operation command for controlling the plant, and can directly identify the effect of the event.

1 is a schematic configuration diagram of a plant control system including a plant control device according to Embodiment 1; FIG. 3 is a diagram illustrating an example of control logic of the plant control device according to Embodiment 1; FIG. FIG. 2 is a diagram illustrating an operation instruction set according to Embodiment 1; FIG. 4 is a diagram for explaining processing in an incidental information propagation unit according to Embodiment 1; FIG. 4 is a flow chart of calculation instructions according to the first embodiment; 4 is a flowchart of processing in an event detection unit according to Embodiment 1; 4 is a flow chart of processing in an incidental information propagation unit according to Embodiment 1. FIG. 2 is a configuration diagram of a plant monitoring device according to Embodiment 2; FIG. FIG. 11 is a configuration diagram of a data collection device according to Embodiment 3; FIG. 11 is a configuration diagram of a plant control device simulator according to Embodiment 4; FIG. 15 is a diagram illustrating an example of an arithmetic instruction according to the fifth embodiment; FIG. FIG. 15 is a diagram illustrating an example of an arithmetic instruction according to the fifth embodiment; FIG. FIG. 15 is a diagram illustrating an example of an arithmetic instruction according to the fifth embodiment; FIG. FIG. 13 is a diagram for explaining the data structure of supplementary information according to Embodiment 6;

In the description of the embodiment and each drawing, the parts with the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
FIG. 1 is a schematic configuration diagram of a plant control system according to Embodiment 1. FIG.
The plant control system 1 is composed of a plant control device 7 to which a plurality of controlled devices 2 such as manufacturing devices are connected, a monitoring device 9 and a maintenance terminal 10 which are connected to the plant control device 7 via a network 12. Note that another plant control device connected to other manufacturing equipment may be connected via the network 12, but is omitted here.
The plant control device 7 has an input/output unit 3 , a control unit 4 and a communication processing unit 8 . The input/output unit 3 receives input data from the control target device 2 such as manufacturing equipment, and the calculation unit 5 in the control unit 4 performs various calculations for controlling the control target device 2 . Applications for computation and data of computation results are stored in the recording unit 6, and are read or written as necessary. The calculation result is sent to the controlled device 2 via the input/output unit 3 again, and the operation of the controlled device 2 may be controlled.

When it is determined that the control target device 2 is abnormal as a result of performing predetermined calculation processing on the input data from the control target device 2 in the calculation unit 5, an instruction is sent from the communication processing unit 8 via the network 12 to the monitoring device 9 and the maintenance terminal 10. As an example, an alarm is generated by the monitoring device 9, the plant control system 1 is stopped by the maintenance terminal 10, and system maintenance is performed.

FIG. 2 shows an example of control logic 20 executed by the plant control device 7 shown in FIG.
The control logic 20 shown here is composed of inputs 22 to 25, operation instructions 30, 31, and an output 40, and a plurality of operation instructions 30, 31 are arranged consecutively. Calculation data 50 and 51, which are the results of sequential calculations, and incidental information 60 and 61 for complementing the calculation data 50 and 51 are propagated via solid lines connecting the elements between the inputs 22 to 25 and the calculation instructions 30 and 31 and between the calculation instructions 30 and 31. For example, in a portion where a plurality of operation instructions 30 and 31 are arranged in succession, the operation data 50 and incidental information 60 are propagated as a unit to the solid line on the output side shown below the operation instruction 30, and the operation data 51 and the incidental information 61 are propagated together to the solid line on the output side of the operation instruction 31 and sent to the output.

Here, the additional information 60 and 61 is information added to the operation data 50 and 51 which are the operation results of the operation instructions 30 and 31 to complement the operation data 50 and 51, and is handled together with the operation data 50 and 51. When the calculation instructions 30, 31 are executed and the obtained calculation data 50, 51 are affected by an event given to the plant control system 1, identification marks 65, 66 indicating this are added to the supplementary information 60, 61.

Although two operation instructions 30 and 31 are arranged in FIG. 2, more operation instructions may be arranged. Furthermore, in addition to the computation data 50 and 51 from the other computation instructions 30 and 31, the input data from the controlled device 2 may also be propagated to the computation instructions 30 and 31 in some cases. This input data represents the state of the device 2 to be controlled, and can be said to be data equivalent to the computation data 50 and 51 and the additional information 60 and 61 that are propagated between the computation instructions 30 and 31 . Therefore, this input data can be handled in the same manner as the computation data 50, 51 and the incidental information 60, 61 propagated between the computation instructions 30, 31. FIG.

Further, in Embodiment 1, an event means that an operation different from the normal operation of the plant control system 1 occurs, such as a control operation to the plant control system 1 or an abnormal operation of the controlled equipment 2 that constitutes the plant control system 1. An event caused by such a specific control process, an abnormal operation, etc. is detected based on the judgment criteria corresponding to each process by executing the process defined by the operation commands 30 and 31 for the input data to the plant control device 7.
As an example, when "0" is input as the denominator value in the arithmetic instructions 30 and 31 that perform division, it is detected as an illegal arithmetic event of zero division based on the criteria based on the characteristics of the arithmetic instructions 30 and 31.

Furthermore, a change in input data caused by a user's control operation may be detected as an event. As an example of detecting a user's control operation, in the case of calculation instructions 30 and 31 that perform PID control with a function to switch between automatic operation and manual operation, a change in input data that specifies whether to operate in which operation mode, automatic operation or manual operation, is detected and detected as an operation mode switching event.

FIG. 3 shows the configuration of an arithmetic instruction set 70 in which a plurality of arithmetic instructions 30 and 31 for constructing the control logic 20 are prepared. The operation instruction set 70 is composed of a plurality of necessary operation instructions 30, 31 so that the user of the plant control system 1 can select and combine the necessary operation instructions 30, 31 from the operation instruction set 70 to form a program.
Although FIG. 3 shows an example in which N types of operation instructions, operation instructions A to N, are used, the number of operation instructions 30 and 31 is not limited to this, and the number of operation instructions 30 and 31 required for creating a program can be used.

The calculation instruction A75 is composed of a control calculation section 71, an event detection section 72, and an incidental information propagation section 73. FIG. The control calculation unit 71 performs calculations using the input data to obtain calculation data 50 and 51 . The event detection unit 72 has judgment criteria considering the characteristics of the operation instruction A75, and detects events such as illegal operations and specific processing. Further, when the incidental information 60, 61 of the operational data 50, 51 propagated to the computational instructions 30, 31 has the identification indicators 65, 66 indicating the influence of the event added thereto, the incidental information propagation unit 73 copies the identification indicators 65, 66, adds them to the incidental information 60, 61 of the computational data 50, 51, and propagates them to the next output 40 or the computational instruction 31.

The control calculation unit 71, the event detection unit 72, and the additional information propagation unit 73 are configured as a set, and simultaneously execute the execution of the calculations instructed by the calculation instructions 30 and 31, the event detection, and the additional information propagation as a set. Therefore, compared to a configuration in which all the calculation data 50 and 51 are collectively obtained and, for example, the event detection device and the additional information propagation device provided separately from the plant control device 7 are used to process the calculation data 50 and 51, the device configuration can be simplified, and the determination of the event's influence on the calculation data 50 and 51 and the propagation processing of the additional information 60 and 61 can be performed accurately.

Propagation processing of incidental information in incidental information propagation section 73 will be described with reference to FIG.
FIG. 4 shows, by way of example, control logic consisting of inputs 22, 23, arithmetic instructions 30 and outputs 40. FIG. This control logic indicates that data A and data B input from the control target device 2 pass through the input 22 and input 23, respectively, through the operation command 30, and reach the output 40 as data C. FIG.
Incidentally, the data A in FIG. 4 is attached with an identification mark, and the data B is not attached with an identification mark.

In the first embodiment, when at least one of the data A and data B input to the operation instruction 30 has an identification mark indicating that it is affected by an event added to the additional information, the identification mark is copied and added to the additional information handled integrally with the data C output from the operation instruction 30.
Therefore, in the example of FIG. 4, since the identification mark is added to the data A, the additional information of the data C is also added with the identification mark. Conversely, when only data B has an identification mark added thereto, data C also has an identification mark added thereto.

If an identification mark indicating that the data has been affected by an event is not added to the incidental information of data A and data B, the identification mark is not added to the incidental information of data C output from the operation instruction 30. - 特許庁

As described above, in the first embodiment, as shown in FIG. 2, when the additional information 60 of the calculation data 50 input to the calculation instruction 30 is added with the identification mark 65 indicating that an event has been detected, the identification mark 66 is always added to the additional information 61 of the calculation data 51 to be sent to the next calculation instruction 31. Further, when the identification mark 65 is not added to the incidental information 60 of the input operation data 50 , the identification mark 66 is not added to the incidental information 61 of the operation data 51 to be sent to the next operation instruction 31 . That is, when the operation data 50 and 51 are propagated between the operation instructions 30 and 31, if the identification marks 65 and 66 are added to the incidental information 60 and 61 at the stage of reaching the final output 40, it indicates that the influence of the event was detected at some stage, the input data and the influence of the event can be reliably related, and the input data from the controlled device 2 affected by the event can be correctly grasped.

5 to 7 according to the execution of the arithmetic instructions 30 and 31 and the method of propagating the incidental information 60 and 61, etc. described above, the flow of execution of the arithmetic instructions in the first embodiment will be described.
FIG. 5 shows the flow of the entire operation instruction, FIG. 6 shows the flow of processing by the event detection unit, and FIG. 7 shows the flow of processing by the incidental information propagation unit.
Note that the flow of operation instructions in FIG. 5 is executed sequentially for a plurality of operation instructions 30 and 31, but for the sake of simplification of explanation, the flow is described as a flow for executing the operation instructions 30 and 31 once.

Calculation instructions 30 and 31 are executed in three steps of a control calculation section 71, an event detection section 72, and an incidental information propagation section 73, as indicated by the calculation instruction A75 in FIG.
As shown in FIG. 5, each process can be roughly divided into arithmetic processing in the control arithmetic unit 71 (control arithmetic unit processing: step S100), processing in the event detection unit 72 for detecting that it is affected by an event (event detection unit processing: step S200), and processing for propagating the identification marks 65 and 66 to the next arithmetic instructions 30 and 31 (incidental information propagation unit processing: step S300).
Steps S<b>100 to S<b>300 are executed according to the data input from each controlled device 2 .

Also, the event detection section processing (step S200) and the incidental information propagation section processing (step S300) are executed according to the flows shown in FIGS. 6 and 7, respectively.
As shown in FIG. 6, the event detection unit process (step S200) first determines in step S201 whether or not the effect of the event has been detected based on the calculation data 50 and 51 of the calculation instructions 30 and 31 performed by the control calculation unit 71. FIG. If the influence of the event is detected (YES), identification marks 65 and 66 are added to the incidental information 60 and 61 of the calculation data 50 and 51 in step S202. On the other hand, if no event is detected (NO), the flow ends without going through step S202.

Next, as shown in FIG. 7, in the incidental information propagating unit process (step S300), in step S301, it is determined whether the incidental information 60, 61 propagated to the operation instructions 30, 31 has the identification marks 65, 66 added thereto. If so, the identification marks 65 and 66 are copied as they are (step S302), and the identification marks 65 and 66 are added to the incidental information 60 and 61 of the operation instructions 30 and 31 (step S303). On the other hand, if the identification marks 65 and 66 are not added to the incidental information 60 and 61, the flow ends without adding the identification marks 65 and 66 without going through steps S302 and S303.

As described above, the plant control device 7 according to the first embodiment handles the calculation data 50 and 51 and the supplementary information 60 and 61 as a unit. Calculation instructions 30 and 31 are composed of a control calculation section 71 , an event detection section 72 , and an incidental information propagation section 73 .
In the plant control device 7 of the first embodiment, when the additional information 60, 61 of the operation data 50, 51 is added with the identification mark 65, 66 indicating that the influence of the event is detected, the identification mark 65, 66 is copied and added to the additional information 60, 61 of the operation data 50, 51 to be propagated to the next operation instruction 30, 31. On the other hand, when the identification marks 65 and 66 are not added to the calculation data 50 and 51, the identification marks 65 and 66 are not added to the calculation data 50 and 51 propagated to the next calculation instruction.

By having these features, the device configuration of the plant control device 7 can be simplified. In addition, since the detection of the effect of the event on the operation data 50, 51 and the propagation processing of the incidental information 60, 61 can be performed simultaneously in synchronization with the execution of the operation instructions 30, 31, the effect of the event can be accurately specified. Furthermore, it is possible to correctly grasp whether or not an event has been detected in the calculation data 50 and 51 that have reached the output 40 .

Embodiment 2.
The second embodiment relates to a plant monitoring device 211 using the plant control device 7 described in the first embodiment.
FIG. 8 shows the configuration of the plant monitoring device 211 according to the second embodiment.
The plant monitoring device 211 is used integrally with the plant control device 201, and the plant control device 201 in FIG. 8 shows the plant control device 7 shown in the first embodiment.

The plant control device 201 outputs calculation data 202 and incidental information 203 based on input data from the controlled device 2 . The output data is transmitted to the communication processing unit 214 of the plant monitoring device 211 via the communication processing unit 204 of the plant control device 201 and the network 200 .

The plant monitoring device 211 has, as an application program 212, a plurality of calculation instructions 30, 31 executed by the plant control device 201. As an output from the application program 212, the layout diagram of the calculation instructions 30, 31, calculation data 50, 51, etc. corresponding to the control logic shown in Embodiment 1 is displayed on the display unit 213 as an image image.

The plant monitoring device 211 displays the calculation data 202 acquired from the plant control device 201, the incidental information 203, the presence or absence of the identification marks 65 and 66, and other information superimposed on the image of the control logic displayed on the display unit 213.
As an example, it is possible to change the color of the solid line between each operation and data such as the operation instructions 30 and 31 according to the purpose difference, and display character information such as data propagating along the solid line.

The plant monitoring device 211 using the plant control device 201 described in Embodiment 1, described in Embodiment 2, can visualize the effects of events in the plant control system, etc., and can easily grasp the operation status of the plant.

Embodiment 3.
The third embodiment relates to the data collection device 221 using the plant control device 7 described in the first embodiment.
FIG. 9 shows the configuration of the data collection device 221 described in the third embodiment.
The data collection device 221 is used integrally with the plant control device 201, and the plant control device 201 in FIG. 9 shows the plant control device 7 shown in the first embodiment.

The plant control device 201 outputs calculation data 202 and incidental information 203 based on input data from the controlled device 2 . The output data is transmitted to the communication processing unit 224 of the data collection device 221 via the communication processing unit 204 of the plant control device 201 and the network 200 .

The data collection device 221 periodically acquires the calculation data 202 and the supplementary information 203 from the plant control device 201 via the communication processing unit 224 . The acquisition cycle is, for example, a 1-second interval cycle, and is determined in consideration of the processing capacity required for analyzing data stored in the database, the relationship between data accuracy and data size, the communication speed restrictions of the network 200, and the like during actual operation.

The data collection device 221 stores the calculation data 202 , the incidental information 203 and the time information acquired from the plant control device 201 from the communication processing unit 224 via the database I/F unit 223 in the database 222 .
The database 222 is time-series data of the operation data 202 and the incidental information 203, and the user can know the past state of the plant control device 201 by referring to the database 222. FIG. In particular, the database 222 has supplementary information 203 that enables determination of the presence or absence of the influence of the event, so that the influence of the event can be correctly grasped at the past point in time.

Embodiment 4.
The fourth embodiment relates to a plant controller simulator 231 using the plant controller 7 described in the first embodiment.
FIG. 10 shows the configuration of the plant controller simulator 231 according to the fourth embodiment.
The plant control device simulator 231 is used integrally with the plant control device 201, and the plant control device 201 in FIG. 10 shows the plant control device 7 shown in the first embodiment.

The plant control device simulator 231 acquires the calculation data 202 and the additional information 203 from the plant control device 201 via the communication processing unit 234, transfers them to the calculation data 236 and the additional information 237 of the plant control device simulator 231, and sends them to the post-calculation control device simulation unit 235. The control device simulation unit 235 is a computer installed in the plant control device simulator 231 and has a computer program configured to reproduce control calculations in the plant control device 201 . This calculator executes calculations using the calculation data 236 and the additional information 237 and records the calculation results in the calculation data 236 and the additional information 237 .

The plant control device simulator 231 has, as an application program 232, a plurality of operation instructions executed by the plant control device 201. As an output from the application program 232, the arrangement of operation instructions and operation data corresponding to the control logic shown in Embodiment 1 is displayed on the display unit 233 as an image image.

Furthermore, the display unit 233 superimposes information such as calculation data 236, incidental information 237, and presence/absence of an identification mark obtained through the control device simulation unit 235 on the image of the control logic.
As an example, as in the second embodiment, it is possible to change the color of each operation such as an operation instruction, change the color of the solid line between data according to the purpose, and display character information such as data propagating along the solid line.

The user can rewrite the calculation data 236 and the incidental information 237 to arbitrary values via the data setting unit 238 . The user can perform desired operations in the plant control device 201 via the data setting unit 238 and check the simulation results on the display unit 233 .
In this manner, by using the plant control device simulator 231 of the fourth embodiment, it is possible to grasp in advance how the operation to be performed affects the plant control device 201 . Further, by rewriting the calculation data 236 from the data setting unit 238 as if a specific failure had occurred, the influence of the specific failure on the plant control device 201 can be grasped in advance.

Embodiment 5.
In the fifth embodiment, it is not necessary to copy and propagate the identification marks 65 and 66 to the supplementary information 60 and 61 when the operation instructions 30 and 31 constituting the control logic satisfy certain conditions. Examples of such operation instructions 30 and 31 will be described with reference to FIGS. 11 to 13. FIG.

In the first embodiment of the present application, in principle, when the additional information 60, 61 of the operation data 50, 51 propagated to the operation instructions 30, 31 has the identification mark 65, 66, it is copied and propagated to the next operation instruction 30, 31.
However, as an exception, if the operation data 50, 51 output from the operation instructions 30, 31 can be determined by the input data not affected by the event, even if the incidental information 60, 61 of the other input data has the identification label 65, 66, the identification label 65, 66 is not added to the operation data 50, 51 propagated to the next operation instruction 30, 31.

In other words, even if the operation data 50 and 51 output by the operation instructions 30 and 31 up to that time are attached with the identification marks 65 and 66, it is clear that the operation data 50 and 51 to be output are not affected by the event because the operation data 50 and 51 of the operation instructions 30 and 31 this time are determined only by the input data unaffected by the event. Therefore, there is no need to perform event detection unit processing or the like on the calculation data 50 and 51, and the identification marks 65 and 66 are not required.

Examples of the operation instructions 30 and 31 of the fifth embodiment are shown below.
In each of FIGS. 11 to 13, the upper table shows input values and output values when basic logic operations are performed, and the lower tables show block diagrams showing the operations.
FIG. 11 shows the logical operation of the AND instruction. When at least one of input A and input B is "0", the value of output Y is "0". It is assumed here that input A is input data unaffected by events.

When the input A is "0", the output Y is "0" regardless of the value of the input B.
In this theoretical calculation, the value of the output Y can be determined by the input A that is not affected by the event, so it can be said that the output Y is not affected by the event without considering the presence or absence of the identification marks 65 and 66 of the event detection and the input B.

As described above, when the operation instructions 30 and 31 are logical operations of the AND instruction shown in FIG. 11, and one of the input data is "0" which is not affected by the event, it is not necessary to add the identification marks 65 and 66 to the incidental information 60 and 61 of the operation data 50 and 51, and unnecessary propagation of the identification marks 65 and 66 can be prevented.

FIG. 12 shows the logical operation of the OR instruction. When at least one of input A and input B is "1", the value of output Y is "1". It is assumed here that input A is input data unaffected by events.

In this theoretical calculation, as in FIG. 11, the value of the output Y can be determined by the input A that is not affected by the event, so it can be said that the output Y is not affected by the event without considering the presence or absence of the identification mark of the event detection and the input B.
Therefore, by not adding the identification mark to the incidental information 60 and 61 of the calculation data 50 and 51, it is possible to prevent unnecessary propagation of the identification mark.

FIG. 13 shows the logical operation of the selector instruction. A selector instruction is an instruction for selecting and outputting one of a plurality of inputs. In FIG. 13, input S selects which of input A and input B is to be output.
Here, assuming that the input S and the input A are input data unaffected by events, when the input S is "1", the output Y becomes the value of the input A without being affected by the input B, and the output Y can be determined by the input S and the input A unaffected by the event.

Therefore, it can be said that the output Y is not affected by the event without considering the event detection and the presence or absence of the identification mark of the input B. By not adding the identification mark to the incidental information 60 and 61 of the calculation data 50 and 51, unnecessary propagation of the identification mark can be prevented.

Embodiment 6.
In Embodiment 1 of the present application, the identification marks 65 and 66 added to the supplementary information 60 and 61 of the calculation data 50 and 51 indicate the presence or absence of the influence of the event, and do not indicate the type of event. The sixth embodiment separates and manages multiple types of events detected from the computation data 50 and 51 .

Here, the term "separately managed by event type" does not necessarily mean that all individual events are separately managed, but also means that event types are divided into a plurality of groups, such as failure content and operation content, and managed separately for each group.

In the event detection performed simultaneously with the execution of the calculation instructions 30 and 31, by managing a plurality of types of events, it is possible to recognize from the identification marks 65 and 66 added to the incidental information 60 and 61 what kind of failure or which operation the calculation data 50 and 51 were affected by, and useful information can be provided to the user of the plant control device.

FIG. 14 is a diagram illustrating a data structure for recording identification marks 65 and 66 in additional information 60 and 61 in the sixth embodiment.
The incidental information 60 and 61 of the plant control device 7 shown in Embodiment 1 has a structure having only one recording area 300 as shown in the upper part. However, in the sixth embodiment, the incidental information 60, 61 has a plurality of recording areas 301 to 304, and not only the presence or absence of the identification marks 65, 66 but also the type of event affected can be recorded at the same time.

In the description so far, the configuration for separately managing a plurality of types of events has been described with reference to FIG. However, it is also possible to record in the recording areas 301 to 304 of the incidental information 60 and 61 the number of passing instructions from the event occurrence location where the influence of the event is detected, instead of classifying the event types.
The number of passing instructions is grasped by incrementing the count value each time the operation instruction 30, 31 in which the event occurs passes through the other operation instruction 30, 31 and the identification mark 65, 66 is copied.

Information on the number of passing instructions indicates the degree of influence from the location where the event occurred. When the number of passing instructions is small, the event was detected most recently, and the degree of influence is large. Conversely, when the number of passing instructions is large, the degree of influence is small.
Therefore, when the number of passing instructions exceeds a predetermined value, it is judged that the degree of influence has become sufficiently small, and a function of deleting the identification marks 65 and 66 added to the supplementary information 60 and 61 can be provided. By deleting the identification marks 65 and 66, it is possible to permanently prevent the identification marks 65 and 66 from propagating when there is an instruction to repeatedly execute the operation instructions 30 and 31. FIG.

Embodiment 7.
The identification marks 65 and 66 added to the incidental information 60 and 61 are information subordinately following the calculation data 50 and 51, and the first embodiment and the like do not consider that the control calculation unit 71 of each of the calculation instructions 30 and 31 performs processing using the identification marks 65 and 66 as data. However, it is also possible to perform arithmetic processing such as setting all of the arithmetic data 50 and 51 to which the identification marks 65 and 66 are added under the influence of the event to "0".

In the present application, the event detection section 72 and the incidental information propagation section 73 of the calculation instructions 30 and 31 detect the influence of the event and generate the identification marks 65 and 66, which can be used as data in the control calculation section 71 of the same calculation instructions 30 and 31.
When the identification marks 65 and 66 created by other devices are used in the control calculation unit 71 of the calculation instructions 30 and 31, timing deviation may occur and correction may be required. However, in the seventh embodiment, since data creation and computation are performed in the same device, there is no timing deviation or the like.

Although this application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to the application of particular embodiments, but are applicable to the embodiments singly or in various combinations.
Therefore, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

1 plant control system 2 controlled equipment 3 input/output unit 4 control unit 5 calculation unit 6 recording unit 7 plant control device 8 communication processing unit 9 monitoring device 10 maintenance terminal 12 network 20 control logic 22 input 23 input 24 input 25 input 30 calculation instruction 31 calculation instruction 40 output 50 calculation data 51 calculation data 60 incidental information 61 appendix band information, 65 identification mark, 66 identification mark, 70 calculation instruction set, 71 control calculation unit, 72 event detection unit, 73 incidental information propagation unit, 75 calculation instruction A, 200 network, 201 plant control device, 202 calculation data, 203 incidental information, 204 communication processing unit, 211 plant monitoring device, 212 application program, 213 display unit, 214 communication processing unit, 221 data collection device, 222 database, 223 database I/F section, 224 communication processing section, 231 plant control device simulator, 232 application program, 233 display section, 234 communication processing section, 235 control device simulation section, 236 calculation data, 237 incidental information, 238 data setting section, 300 recording area, 301 recording area, 302 recording area, 303 recording area, 304 recording area.

Claims (8)

A plant control device having an input/output unit, a control unit, and a communication processing unit, wherein a plurality of operation instructions for calculating input data from a device to be controlled are arranged in succession, and operation data that is the operation result of the operation instruction and incidental information that complements the operation data are propagated from the previous stage to the operation instruction at the next stage, and from the current stage to the operation instruction at the next stage .
A plant control apparatus characterized in that, even if first incidental information of first computational data among a plurality of computational data propagated from a preceding stage to this stage includes an identification mark indicating that the first computational data is affected by an event, the identification mark is not added to the third incidental information of the third computational data in the case of a computation instruction that can determine third computational data of the next stage by second computational data that is not affected by the event among the other computational data. 2. The plant control apparatus according to claim 1, wherein the operation data and the incidental information are propagated between operation instructions as a unit . 3. The plant control apparatus according to claim 1 or 2, characterized in that arithmetic processing is executed as a set of a control arithmetic unit process that executes the arithmetic instruction, an event detection unit process that detects that the event is being affected, and an incidental information propagation processing unit that adds the identification mark to the second incidental information of the second computational data and propagates it from the current stage to the next stage when the identification mark is added to the first incidental information propagated from the preceding stage to the current stage. 4. The plant control device according to any one of claims 1 to 3, wherein said incidental information has a recording area for recording the type of said identification mark. A plant control device having an input/output unit, a control unit, and a communication processing unit, wherein a plurality of operation instructions for calculating input data from a device to be controlled are arranged in succession, and operation data that is the operation result of the operation instruction and incidental information that complements the operation data are propagated from the previous stage to the operation instruction at the next stage, and from the current stage to the operation instruction at the next stage.
When the first incidental information of the first operational data propagated from the preceding stage to the current stage includes an identification mark indicating that the first operational data is affected by an event different from the normal operation of the device to be controlled, the identification mark is copied and added to the second incidental information of the second operational data propagated from the current stage to the next stage, and when the number of passing instructions obtained by counting up the number of times of copying exceeds a predetermined value, the identification mark is not copied to the operational data of the arithmetic instructions arranged after that. plant controller. A plant control device according to any one of claims 1 to 5 ;
a display unit that displays the control logic of the plant control device,
A plant monitoring apparatus, wherein the operation instruction affected by the event is displayed on the display unit. A plant control device according to any one of claims 1 to 6 ;
A data collection device comprising a database for collecting and storing the calculated data and the identification mark from the plant control device. A plant control device according to any one of claims 1 to 7 ;
a computer that performs simulation according to the control logic of the plant control device using the calculated data and the incidental information obtained from the plant control device;
a display unit that displays both the simulation result of the computer and the calculation result of the plant control device,
A plant control device simulator, wherein the operation instruction affected by the event and the simulation result of the computer are displayed on the display unit.

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