JP2857711B2 - Plant control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plant control device, in particular,
In the fields of chemistry, electric power, steel, etc., at least two of electrical control system, instrumentation control system, and computer control system are integrated,
The present invention relates to a plant control device suitable for realizing compact hardware and software.

[Conventional technology]

FIGS. 7 to 9 show examples of conventional plant control devices, and FIGS. 7 to 9 show examples of databases in those plant control devices.
Figure 10 shows.

As shown in FIG. 7, a conventional plant control device has been independently configured in a closed state in terms of hardware and software in each field of an electric control system, an instrumentation control system, and a computer control system. .

That is, the plant controller for electric control includes the man-machine computer 11 for electric control, the LAN 12 for electric control, and the electric control controller groups 131 and 132. The plant control device for instrumentation control includes a man-machine computer 21 for instrumentation control,
Instrument control LAN 22 and instrument control controllers 231, 232
Consists of The computer control plant control device includes a computer control man-machine computer 31, a computer control LAN 32,
It comprises computer control controller groups 331 and 332.

In terms of functions, in the fields of electric control systems, instrumentation control systems, and computer control systems, operation control, quality control, monitoring, maintenance, operation, and the like unique to each field have been realized. Therefore, even if terms such as "control" and "monitoring" are common to each field, their contents may greatly differ. For example,
The meter for electric control indicates an actual value, whereas the meter for instrumentation control is indicated by% of a predetermined value.
Further, in the computer control system, for example, C or Fortran is used as a language, whereas in the electric control system, a special language is used to code a flowchart almost as it is. Therefore, the databases for exerting the functions of the respective control systems are individually constructed, and the databases are different, so that it has been difficult to exchange data with each other. Also, for example, the personnel of the electrical control system and the personnel of the instrumentation control system use different methods and languages, and there is almost no entry between them.
It was necessary to prepare a man-machine computer equipped with the software for use in software production support for each control system. This is very wasteful.

FIG. 8 and FIG. 9 are diagrams showing a plant control device of a modification of the device of FIG.

In the example of FIG. 8, a process is performed between the computer control controller 331 and the instrumentation control controller 232 in order to transfer information between the computer control plant control device and the instrumentation control plant control device. They are connected by an input / output device 41. Further, in order to transfer information between the computer control plant control device and the electric control plant control device, the computer input / output controller 42 connects the computer control controller 331 and the electric control controller 132 with each other. is there.

FIG. 9 is a diagram showing data transfer between the computer control plant control device and the instrumentation control plant control device, and data transfer between the computer control plant control device and the electric control plant control device. In this example, the opposed communication control devices 51 and 52 are used to send and receive communication.

An example of a conventional plant database is shown in FIG.
There are set values and monitored values in each field of electrical control system, instrumentation control system, and computer control system, but their specifications and definitions are made independently in each field. , Are defined individually in each field.
For this reason, for example, when the unit of the value to be monitored or the number of words is changed, it is necessary to independently change the value by the support device in each field.

[Problems to be solved by the invention]

The conventional plant control device has the following disadvantages.

(1) Since each control system has its own database and independently defines units and the number of words, etc., it is necessary to absorb differences in definitions when accessing to share data from other control systems. And special data combining means such as a remote control device.

(2) In each control system, it is necessary to prepare a controller, and there may be a case where an extra controller needs to be prepared for the entire capacity of the controller group required by the entire plant control device.

(3) It is necessary to prepare a man-machine computer for each field. This is because the symbols and contents of the screen that the personnel of the instrumentation control system wants to see and the screen that the personnel of the electric control system want to see are different.

(4) When the man-machine computer and controller group of the electrical control system, instrumentation control system, and computer control system are connected to the same LAN, if the database is unique in each field, the number of software accesses and the , The number of transfers increases, and the responsiveness of the control device decreases.

It is an object of the present invention to be able to absorb differences in languages and definitions in a plant control apparatus in which an electrical control system, an instrumentation control system, a computer control system, and the like using different document systems coexist, and efficiently integrate the entire system. It is to provide a possible plant control device.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a plant control apparatus including a plurality of control systems for controlling a plant using control methods of different expression forms, wherein a plant database common to each control system and a representation of each control method are provided. A man-machine computer which has means for converting the format and the representation format of the plant database to and from each other and which can be commanded by switching all control methods, and a controller which has a plant database having a common representation format with the plant database and controls the plant And wherein the controller comprises:
Means for preliminarily registering a code for identifying the own plant database, and comparing the registered code with a code transferred from another controller or a man-machine computer, and fetching data into the own plant database when they match. And a plant control device provided with means.

In order to achieve the above object, the present invention also provides a plant control apparatus including a plurality of control systems for controlling a plant by control methods of different expression formats, wherein a plant database common to each control system and each control method are provided. A man-machine computer that has a means for converting between the expression format of the plant and the tabular format of the plant database and that can switch and instruct all control methods, and a plant database that has a plant database with a common expression format as the plant database And a controller that includes means for controlling the plant by all control methods in accordance with a command from a man-machine computer.

The plant database, the data, a database common to each control method consisting of set values and monitoring values,
It is preferable that each control method is a means for storing the data separately from a database unique to the control method.

[Action]

In the present invention, a man-machine computer and a LAN supporting all fields of an electric control system, an instrumentation control system, and a computer control system are provided.
And a group of controllers, and these are equipped with a common database. Since the database is common, the work of defining the database is unified, the burden of the database creation work is reduced, and the modification efficiency is greatly improved.

In particular, the controller pre-registers a code for identifying its own plant database, and compares the code transferred from another controller or a man-machine computer with the registration code and, when the codes match, stores the data in its own. With means for importing into the plant database, regardless of the number of other parties, the transferring side only needs to send out data once, compared to the token ring method, which has to repeat the transfer as many times as the number of other parties , The number of transfers can be reduced, and the LAN transmission load can be reduced.

Electrical control system for man-machine computer and controller,
Hardware is economical because it is shared by the instrumentation control system and the computer control system.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows the configuration of an embodiment of the plant control device according to the present invention.

The plant control device of the present embodiment includes a man-machine computer 61 that supports all fields of electric control, instrumentation control, and computer control, a LAN 71, and controller groups 81, 82, and 83. The man-machine computer 61 and the controller groups 81, 82, and 83 mount a plant database in common.

The controller gathers (collects) monitoring data and production management data, and transfers the data to the database of the man-machine computer 61. This data is a man-machine calculator
On the 61, it is processed with the support software for the electrical control system, instrumentation control system, and computer control system, and used to support man-machine functions in each field.

On the other hand, the controllers 81, 82, and 83 also execute operation control, quality control, and the like in respective fields of electric control, instrumentation control, and computer control.

In addition, in transferring data on the LAN 71, the data is transferred with a code attached thereto, and the man-machine computer 61 and the controller group 81, 82, 83 on the receiving side determine the necessity of reception based on the code. And selectively receive the data, thereby reducing the number of data transfers. This is considerably advantageous as compared with a conventional, for example, token ring system, as will be described later.

FIGS. 2 to 4 show a method of constructing a database in which the electric control system, the instrumentation control system, and the computer control system are unified.

FIG. 2 and FIG. 3 show databases divided into a set value group and a monitoring group. The example of FIG.
The difference is that gathering data and report data are given codes compared to the spirits in the figure.

FIG. 4 shows a database divided into a part held only by the man-machine computer 61 and a part held by the man-machine computer 61 and the controllers 81, 82, and 83. Further, codes are added to gathering data and report data. , A means for reducing the number of times of data transfer described later can be utilized. According to this dividing method, for example, data such as colors, display positions, and display formats for CRT display, which are necessary for the man-machine computer but are not necessary for the controller, are not stored in the controller. And the databases that the controllers 81, 82, and 83 should have.

Although the number of man-machine computers 61 is different from the conventional one, the number of display CRTs may be one in accordance with the number of each control system. It is also possible to make it a window.

FIG. 5 shows an example in which the set value data is transferred from the man-machine computer 61 to the controller groups 81 to 84. The setting value is also added with a code and transferred via the LAN 71. Each controller 8
In steps 1 to 84, the setting code registered in advance as a code to be used is compared with the transferred setting code, and if there is a matching setting code, the setting value is written in the setting value area. If there is no matching setting code, the transmitted setting value is ignored.

The controller 81 collects data and sends it to a man-machine computer.
The case of forwarding to 61 and other controllers 82 to 84 is the sixth
Shown in the figure. Also in this case, similarly to the case of the transfer of the set value in FIG. 5, the gathering code is individually determined by the man-machine computer 61 and the controllers 82 to 84, and is written in the monitoring value area only for the data to be taken. As described above, in the present embodiment, regardless of the number of the other parties, the transmitting side only needs to send out the data once, so that, for example, in comparison with the token ring method in which the transfer must be repeated by the number of the other parties, The number of transfers can be reduced, and the transmission load on the LAN 71 can be reduced.

〔The invention's effect〕

 According to the present invention, the following effects can be obtained.

(1) The database can be shared by different types of control systems, and the work of defining the database is unified. This facilitates database creation and greatly improves the efficiency of database modification.

(2) The man-machine computer and the controller can be shared by the electric control system, the instrumentation control system, and the computer control system, and the hardware construction cost can be reduced.

(3) When the database is divided into a database necessary for humans and a database required for control calculations, the database can be optimized between the man-machine computer and the controller group.

(4) A function to attach codes to data and selectively receive data with a controller or man-machine computer can reduce the number of data transfers, reduce LAN transmission load efficiency, and control system responsiveness. Can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of an embodiment of a plant control apparatus according to the present invention. FIGS. 2, 3, and 4 are diagrams showing a method of configuring plant data according to the present invention.
FIG. 6 and FIG. 6 are diagrams showing a method of transferring plant data.
7, 8, and 9 are block diagrams showing the configuration of a conventional plant control device, and FIG. 10 is a diagram showing an example of conventional plant data. 11 ... Electrical control system Man-machine computer, 12 ... Electrical control system
LAN, 21: Instrumentation control system man-machine computer, 22: Instrumentation control system LAN, 31: Computer control system man-machine computer, 32
…… Computer control LAN, 41,42 …… Process input / output device,
51,52… Opposed communication control device, 61… Man-machine computer, 71… LAN, 81,83… Electrical, instrumentation, computer common controller, 131,132… Electrical control system controller, 231,232… Instrumentation Control system controller, 331,332 ... Computer control system controller.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-172009 (JP, A) JP-A-63-118901 (JP, A) JP-A-63-311503 (JP, A) JP-A-1- 274203 (JP, A) JP-A-2-232703 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G05B 15/02

Claims (3)

(57) [Claims] 1. A plant control apparatus comprising a plurality of control systems for controlling a plant by control methods of different expression forms, wherein a plant database common to each control system, an expression form of each control method, and the plant database And a man-machine computer having a means for converting between all the control methods and capable of instructing the control method, and a controller for controlling a plant having a plant database in a common expression form with the plant database. The controller includes means for registering a code for identifying the plant base of the controller in advance, and a code transferred from another controller or the man-machine computer and the registered code. For importing data into the own plant database Plant control apparatus characterized by comprising a. 2. A plant control apparatus comprising a plurality of control systems for controlling a plant by control methods of different expression forms, wherein a plant database common to the control systems, an expression form of each control method and the plant database are provided. And a man-machine computer having a means for converting between all the control methods and capable of instructing the control method, and a controller for controlling a plant having a plant database in a common expression form with the plant database. The plant control device, wherein the controller includes means for controlling the plant by all the control methods in accordance with a command from the man-machine computer. 3. The plant control device according to claim 2, wherein the plant database stores data in a database common to each control method including a set value and a monitor value, and a database unique to each control method. A plant control device, which is means for separating and storing.