JPS6129001B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic plant operation system that monitors and controls a plant using a computer.

As a plant automatic operation system that monitors and controls plants using computers, plant operation procedures are categorized and organized in a table called an action list, and the corresponding action list is extracted and interpreted according to changes in the plant status. There is a system in which the plant is operated using
issue). FIG. 1 is a block diagram schematically showing such a plant automatic operation system. The state of the plant PNT is sampled and read as a process signal PS by the plant input reading judgment unit SCN. Then, among the read process signals PS, the process signal PS whose state has changed since the previous sampling time is
A trigger signal is issued to the motion control processing unit ACP to extract an action list related to the action list from the action list ACT ₁ , ACTL _o, etc. When the motion control processing unit ACP receives a trigger signal, it draws out a related action list. Then, the operation control processing unit ACP interprets and translates the contents of the pulled-out action list and issues a control output signal CS to the plant PNT in order to perform plant operation according to the contents. In other words, the action list describes the operating conditions that determine which process signal PS is to be drawn when the state changes, and the details of the plant operation that should be performed when the operating conditions are satisfied.

In such an automatic plant operation system, only when a state change occurs in the plant, an action list containing plant operation operations corresponding to the state change is triggered, so that operation that follows the plant state change is triggered. It can be carried out.

On the other hand, the action list is stored in the computer's storage device, and the contents of the action list stored in this storage device can be displayed on a CRT display device and the contents can be changed using a character input device. (Patent application 49-40493)
issue). Figure 2 shows its schematic configuration, and uses the table M-t (action list) stored at the machine language level in the auxiliary storage device M as a backward language processing function in the language processing function BGRF.
It is converted to the source level by COM-b and displayed on the CRT display device DP, and then via the character input device TY.
Change the contents of the displayed source-level table (action list). When the content is changed, the forward language processing function COM-a in the language processing function BGRF converts it to a machine language level and stores it in the auxiliary storage device M.

Such a storage content changing device converts a machine language level table stored in a storage device into a source level table and displays it on a CRT display device, and can change the written content at the source level. The contents of the action list, which describes plant operating procedures, can also be easily changed. In other words, it is possible to easily change the details of the plant operation.

By the way, if it becomes necessary to change, for example, the contents of the operation operation of the plant automatic operation device in which the operation procedures are described in the above-mentioned action list, the contents of the action list can be changed using the above-mentioned memory contents change device. It is possible to do so.

However, it is dangerous to change the contents of the action list while the plant is being operated by the automatic plant operation device. This is because if the action list is quoted by the action control processing unit ACP while the contents of the action list are being changed, there is a risk that the operation will be performed using the contents that are being changed.
For example, in a power generation plant, an action list for opening a valve in steam piping and an action list for closing a valve must be reversed. If the action list is deleted, the contents of the latter action list are changed, and the operation control processing unit is changed before changing the contents of the former action list.
If the ACP quotes both of the above action lists alternately, only the control output signal CS that opens the valve will be output, and the control output signal CS that closes the valve will not be output, making it impossible to control the steam flow rate. I get used to it.

In addition, when changing the operating procedure, it may be necessary to change only one action list, or it may be necessary to change a series of multiple action lists. Even if a part of them is quoted by the operation control processing unit ACP, there is a risk that a control output signal CS that puts the plant in a dangerous state will be output.

In order to avoid this, it is possible to temporarily stop the plant automatic operation device and restart it after changing the contents of the action list, but in that case, the plant automatic operation will become discontinuous and restart again. In this case, understanding the status of the plant PNT will have to be started all over again.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic plant operation system that allows the contents of an action list that describes the operation operations to be changed even during automatic plant operation.

In order to achieve this objective, the present invention includes a storage device that stores in advance a plurality of action lists describing information for plant operation at a machine language level, and a storage device that stores in advance a plurality of action lists that describe information for plant operation, and an action list that is to be processed according to the state of the plant. a plant input reading judgment unit that triggers a list; an action list processing request table that registers a triggered action list; an action list processing table that registers an action list that is being processed; an interlock means which is activated when the written content is changed and interrupts the processing of the action list; and a display device which is activated by the interlock means and converts the written content of the action list from the machine language level to the source level. a language processing means for displaying the action list in the action list and, when a change is made, converting it from the source level to the machine language level and storing it in the storage device, and registering the changed action list in the action list processing request table; When the description content of the action list does not need to be changed, the action lists registered in the action list processing request table are sequentially processed, and when the description content of the action list is changed, the interlock means Interlock preprocessing is performed to prevent the plant from becoming unstable due to interruption of the action list processing, and when the change in the description content of the action list is completed, the processing of the action list is completed. The apparatus is characterized by comprising an action list registered in a table and an operation control processing section that processes the action list registered in the action list processing request table.

The present invention will be described below with reference to one embodiment of the present invention. FIG. 3 is a configuration diagram showing an embodiment of the present invention. PNT is the plant, SCN is the plant input reading judgment unit, ACP is the operation control processing unit, M is the auxiliary storage device, ACTL ₁ , ACTL ₂ , ACTL _o is,
There is an action list stored on the auxiliary storage device M at the machine language level. Furthermore, an action list processing request table ACTRQS and an action list processing table ACTRUN are provided.
In the processing request table ACTRQS, a list of actions requested to be processed by the plant input reading determination unit SCN is registered, and the registration is deleted when the operation control processing unit ACP starts processing. That is, the action list related to the process signal PS that has undergone a state change is requested to be processed by the plant input reading determination unit SCN, and waits for processing by the operation control processing unit ACP. On the other hand, in the processing table ACTRUN, a list of actions being processed by the operation control processing unit ACP is registered, and the registration is deleted when the processing is completed.

These SCN,ACP,M,ACTRQS,
It constitutes a plant automatic operation function for operating the plant using ATRUN, etc., and hereinafter this function will be referred to as the foreground function.

Next, BGRF has the forward language processing function COM-a and the backward language processing function COM-a shown in Figure 2.
DP is a display device, and TY is a character input device. These BGRF, DP, TY, the above-mentioned auxiliary storage device M, etc. constitute a change function for changing the description contents of the action list, and this function will hereinafter be referred to as a background function.

In the present invention, a means for performing the interlock function INLF is provided, and an interlock flag BGRFLG is formed on the main memory CM to control the interlock between the foreground function and the background function.

The interlock flag BGRFLG is set to 1 when a background function execution request is made, and the BGR request bit (initial value 0) which becomes 0 when the background function starts execution, and the BGR request bit (initial value 0) which becomes 1 while the background function is being executed. It has two indicators: BGR mode mode bit (initial value 0).
A switch TX is provided on the character input device TY to request execution of the background function, and when the switch TX is operated, an interrupt signal TS is generated, which is transmitted to the interlock function INLF. ing.

It is now necessary to change the contents of the action list (contents of driving operations), and the execution request interrupt signal TS from the switch TX activates the interlock function.
Suppose it is transmitted to INLF. Then, the interlock function INLF becomes the interlock flag.
The BGR request bit of BGRFLG is changed from the initial value of 0 to 1 to notify the operation control processing unit ACP that a background function request has been made. When the operation control processing unit ACP receives this, it shifts to the background function, but before that shift, it performs interlock preprocessing to prevent the plant from becoming unstable. Here, the interlock preprocessing refers to processing for appropriately interrupting the processing of the action list that is currently being processed by the motion control processing unit ACP. For example, based on the description in the action list, if there is a control output signal CS that is being output, it is a process that waits for the output to end and then stops, thereby interrupting the foreground function.

When the interlock preprocessing is completed, the operation control processing unit ACP sets the interlock flag BGRFLG.
By setting the BGR request bit from 1 to 0 and setting the BGR mode bit from its initial value of 0 to 1, the interlock function INLF indicates that it is okay to interrupt the foreground side function and shift to the background function.
to communicate. From now on, the operation control processing unit ACP
While the BGR mode bit of the interlock flag BGRFLG is 1, the plant input read judgment section
Even if a trigger signal is issued from the SCN, the action list is not processed. Interlock function
When INLF confirms that bit 1 is in BGR mode, it starts the background function for the language processing function BGRF.

In other words, when the operator issues an instruction to change the description content (driving operation content) of the action list in this state, the process of changing the description content of the action list is performed. When the background function is completed, the language processing function BGRF changes the BGR mode bit of the interlock flag BGRFLG from 1 to 0 to notify the operation control processing unit ACP that the background function has ended. Then,
The operation control processing unit ACP performs foreground recovery processing and continues the suspended foreground function.

Here, we will further explain each operation of the foreground function, the interlock preprocessing when transitioning from the foreground function to the background function, the background function, and the foreground recovery processing when transitioning from the background function to the foreground function. Explain in detail.

First, the action list processing request table
ACTRQS is configured such that one bit corresponds to one action list. Then, sequential numbers (these are called action numbers) are given to all action lists in order,
The number corresponds to the order of bits in the table. For example, action number 3
If processing of the action list is required, the third bit of the action list processing request table ACTRQS is set to 1. The operation control processing unit ACP searches the action list processing request table ACTRQS, sequentially fetches action lists corresponding to action numbers whose bit is 1 from the auxiliary storage device M, and processes them. Here, set the bit of the action list processing request table ACTRQS to 1.
The process of transmitting information for causing the action control processing unit ACP to process the corresponding action list is called a trigger. In addition, the operation control processing unit
The bit corresponding to the action list accepted for processing by the ACP is set to 0 by the operation control processing unit ACP.

On the other hand, the action list processing table
ACTRUN is for storing an action list being processed by the operation control processing unit ACP. This is because if the action control processing unit ACP accepts the processing request for an action list that has a processing request, the corresponding bit in the action list processing request table ACTRQS changes from 1 to 0. medium table
It changes the corresponding bit of ACTRUN from 0 to 1 to remember that the action list is being processed. Then, when the processing of the action list is completed, it is set from 1 to 0.

Now, the BGR of the interlock flag BGRFLG
When the request bit becomes 1 and a background function request is transmitted to the action control processing unit ACP, the action control processing unit ACP searches the action list processing table ACTRUN. Through this search, it is determined which action list is currently being processed, and pre-interlock processing is performed on those action lists. That is, it stops after confirming that the output of the control output signal CS has ended. Note that even for an action list for which interlock preprocessing has been completed, the bit in the action list processing table ACTRUN remains 1.

Next, the language processing function BGRF has a relationship (chain) with other action lists regarding the changed action list, so when moving to the foreground function, it is necessary to have the action control processing unit ACP process it once. Then, the corresponding bit in the action list processing request table ACTRQS is set to 1.

On the other hand, the plant input reading judgment unit SCN does not detect process signals even during background functions.
If there is a state change in PS, the corresponding bit in the action list processing request table ACTRQS is set to 1 for the action list related to the process signal. In other words, a trigger is issued to request processing from the operation control processing unit ACP. However, the motion control processing unit ACP does not process the action list during the background function. In other words, during the background function, plant operation is interrupted, but the plant input reading judgment unit SCN
is running, so changes in the plant state are preserved.

In this way, the action list processing table ACTRUN stores the action list whose processing was interrupted at the time of transition to the background function, and the action list processing request table ACTRQS stores the action list processing that was interrupted when the background function transitioned. The action list requested for processing and the modified action list are stored. Therefore, when transitioning to the foreground function after the background function ends, the operation control processing unit
ACP first displays the action list processing table.
Process the action list corresponding to bit 1 of ACTRUN. That is, the action list whose processing was interrupted at the time of transition to the background function is processed. Next, an action list processing request table storing the action list requested to be processed during the background function and the action list whose content has been changed is searched to process the action list. That is, after performing such foreground function recovery processing, normal foreground function processing is continued.

FIG. 4 is a time chart representing the operations described above. This will be explained. A high level of each item in the figure indicates a state where the process is being executed or a state where the bit is 1, and a low level indicates a state where the process is not being executed or a state where the bit is 0. The horizontal direction is the passage of time, and time increases from the left side of the diagram to the right side.
In Figure 3, when an interrupt occurs by switch TX while the foreground function is being executed, the interlock function INLF is activated and the BGR request bit is set to 0.
is set to 1, and the operation control processing unit ACP is activated. Each time the operation control processing unit ACP is started, it checks the BGR request bit and the BGR mode bit. If both are 0, it executes the normal foreground function, but if the BGR request bit is 1, it checks the BGR mode bit. After performing interlock preprocessing, the BGR request bit is set from 1 to 0, and at the same time, the BGR mode bit is set from 0 to 1, and the interlock function INLF is activated. The interlock function INLF starts the language processing function BGRF, and background functions are executed. When the background function ends, the language processing function
BGRF resets the BGR mode bit from 1 to 0 and activates the operation control processing unit ACP.

ACP performs background function recovery processing and continues foreground function. Note that the action list trigger from the plant input reading judgment unit SCN is always issued at random.

Figures 5 to 7 show the interlock function INLF,
This is a flowchart showing a specific example in which the plant input reading judgment unit ACP and the language processing function BGRF are realized by a computer software program.

FIG. 5 is an example of a flowchart of the main components of the program of the interlock function INLF according to the present invention. The interlock function INLF is activated by the operation control processing unit ACP when the interrupt signal TS is generated by the keyboard switch TX of the character input device TY as shown in Fig. 3, and when the preparation for the background function is completed. Ru. First, check whether the BGR mode bit of the interlock flag BGRFLG is 1. If it is 1, it means that the activation is from the operation control processing unit ACP, so the language processing function is activated.
Starts the BGRF program and terminates itself.

If the BGR mode bit is 0, then BGR
Check whether the requested bit is 1, and if it is 1,
In the operation control processing unit ACP, it is assumed that the useless interrupt signal TS has been generated by the switch TX before the preparation of the background function is completed, and the process ends without doing anything. Otherwise, it is a background function request by Switch TX,
The BGR request bit is set to 1 and the operation control processing unit ACP
starts the program and exits itself.

FIG. 6 is an example of a flowchart of the main part of the program of the plant input reading determination unit ACP relating to the present invention. Plant input reading judgment unit
ACP is used in the case of a background function request from the interlock function INLF or from the language processing function BGRF.
It is activated when the background function ends or by a trigger signal from the plant input reading judgment unit SCN. First, it is checked whether the BGR mode bit is 1 or not. If it is 1, the process ends without doing anything because the background function is being executed. Otherwise, the BGR request bit is checked to see if it is 1. If it is 1, there is a request for a background function, so interlock preprocessing such as interrupting the control signal being output or waiting for the output to finish is performed. The BGR request bit is set to 0, the BGR mode bit is set to 1, and the operation control processing unit internal flag is set.
Set ACPINF to 1, start the interlock function INLF program, and terminate itself.

Here, the operation control processing unit internal flag ACPINF
is a flag required as a memorandum within the ACP to determine the timing of the foreground function recovery process, and its initial value is 0.

Returning to the original explanation, the BGR request bit is 1.
If not, the operation control processing unit internal flag
Check whether ACPINF is 1. If it is not 1, it performs normal foreground function processing, that is, searches the ACTRQS table, processes the requested action list, etc.

If the motion control processing unit internal flag ACPINF is 1, it means that the motion control processing unit ACP is started due to the termination of the background function, and after performing foreground recovery processing, the motion control processing unit internal flag ACPINF is set to 0. , performs normal foreground function processing, and exits.

FIG. 7 is an example of a flowchart of the main part of the language processing function BGRF program related to the present invention. The language processing function BGRF is the operation control processing unit
When the preparation for the background function is completed by ACP, it is started from the interlock function INLF and executes the background function processing.
When it is finished, the interlock flag is
It sets the BGR mode bit of BGRFLG to 0, starts the operation control processing unit ACP, and terminates itself.

As described above, according to the present invention, it is possible to change the description contents of an action list containing operating operations for computer-based operation of a plant even while the plant is in operation. At this time, in order to prevent erroneous processing by the foreground function, processing of the action list is interrupted, so changes can be made safely without putting the controlled plant in a dangerous state.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the outline of the automatic operation device of the plant, Fig. 2 is a diagram for explaining the outline of the storage content changing device, and Fig. 3 is a configuration explanation showing one embodiment of the present invention. 4 is a time chart for explaining the operation of FIG. 3, FIG. 5 is a flowchart showing an example of the main part of the interlock function of FIG. 3 related to the present invention, and FIG. FIG. 7 is a flowchart showing an example of the main part of the operation control processing section related to the present invention. FIG. 7 is a flowchart showing an example of the main part of the language processing function of FIG. 3 related to the present invention. PNT...Controlled plant, M...Auxiliary storage device, SCN...Plant input reading judgment unit, ACP...
...Operation control processing unit, DP...Display device, TY...Character input device, TX...Interrupt signal generation switch.

Claims (1)

[Claims] 1. A storage device that stores in advance a plurality of action lists describing information for plant operation at a machine language level, and triggers the action list to be processed according to the state of the plant. A plant input reading determination unit, an action list processing request table for registering a triggered action list, an action list processing table for registering an action list being processed, and changing the description content of the action list. an interlock means activated by the interlock means to interrupt the processing of the action list; and an interlock means activated by the interlock means to convert the written content of the action list from a machine language level to a source level and display it on a display device; language processing means for converting from a source level to a machine language level and storing it in the storage device when a change is made, and registering the changed action list in the action list processing request table; When the description does not need to be changed, the action list registered in the action list processing request table is sequentially processed,
When changing the description content of the action list, interlock preprocessing is performed to prevent the plant from becoming unstable due to interruption of processing of the action list by the interlock means. When the modification of the description contents of the action list is completed, the action control processing unit that processes the action list registered in the action list processing table and the action list registered in the action list processing request table A plant automatic operation device equipped with