JPS62259102A - Computer system for process control - Google Patents

Abstract

PURPOSE:To simplify a computer system for process control and to perform the real time simulation at a high speed by adding a vector arithmetic processor and the software to be processed by said processor to an arithmetic computer which performs the simulating calculation in real time. CONSTITUTION:An arithmetic computer 4 performs the simulating calculation in response to a request received from a cooling line control computer 1 and based on the arithmetic data given from the computer 1. The result of the simulating calculation is given to the computer 1. In this case, the computer 4 carries out the simulation arithmetic via its built-in vector arithmetic processor through processing of software including a heat transmission simulation processing program 15, a vector processor calling subroutine 17, etc., of a built-in CPU14. Therefore it is not required to mount a vector arithmetic to simplify the computer system constitution and to attain the real time simulation at a high speed.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a computer system for process control that requires real-time simulation, such as heat conduction simulation for controlling heating furnaces in steel manufacturing lines. .

[Conventional technology]

A conventional system of this type is shown in FIG. In the figure, l is a cooling line control computer, 2 is a control application program executed on this computer 1, 3 is a simulation request subroutine that requests a heat conduction simulation, and 4 is a special calculation for executing a heat conduction simulation. A computer, 5 is a heat conduction simulation processing program executed on this special calculation computer 4, 6 is a heat conduction simulation microprogram used for simulation calculation called by this program 5, 7 is a cooling line control computer 1; A calculation request signal and calculation data issued from the control application program 2 to the heat conduction simulation processing program 5 of the special calculation computer 4, and 8 are returned from the heat conduction simulation processing program 5 to the control application program 2. 9 is a heating furnace control computer having the same configuration as the cooling line control computer 1, 10 is a serial transmission line for transmitting signals such as 7.8, and 11, '12.13 are each This is a station that connects the computer 1.4.9 to the transmission line 10.

Next, the operation will be explained.

When it becomes necessary to perform simulation calculations, the control application program 2 on the cooling line control computer 1 executes a simulation request subroutine 3.
call. The subroutine 3 starts the heat conduction simulation processing program 5 in the special calculation computer 4 through the serial transmission line 10 and at the same time passes data 7 necessary for the calculation. Heat conduction simulation processing program 5
The CPU performs all processing while receiving and receiving data and using microprogram 6 for heat conduction simulation.
A and returns the result 8 to the simulation request subroutine 3. An operation similar to this is also possible from the heating run control computer 9. Here, the heat conduction simulation microprogram 6 is a firmware version of the calculation patterns that are frequently used because the heat conduction calculation is an integral calculation over a minute time and requires a huge amount of loop processing. This reduces execution time.

[Problem that the invention seeks to solve]

However, in the conventional system, it is necessary to develop a microprogram for each processing content for the special calculation computer 4 according to the processing content of the simulation. There were also restrictions on the processes that could be executed.

There is also a method in which the control computer (1 or 9) itself is equipped with a dedicated processor such as a vector processor, but in this case, it is necessary to add a dedicated processor to each control computer, which causes problems such as increased cost. was there.

This invention was made to solve the above-mentioned problems, and allows real-time simulations such as heat conduction simulations using versatile vector operation instructions without having to develop microprograms for each simulation. The system can be executed faster than before, and
The purpose is to provide a system that can respond to processing requests from multiple control computers.

[Means for solving problems]

The process control computer system according to the present invention includes a built-in vector processor added to the arithmetic computer in addition to the original CPU, and is equipped with software for processing simulation calculations with the vector processor, and multiple It is connected to a control computer.

[Effect]

The simulation process in this invention is described by a combination of vector basic instructions of a vector processor that executes vector operations at high speed, and is executed at high speed by a CPU and a vector processor.

Additionally, this system simultaneously accepts multiple simulation requests from multiple control computers connected via transmission lines and processes them in parallel.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, the same reference numerals as in FIG. 4 indicate the same or corresponding parts. In the figure, numeral 4 is a real-time simulation processor improved according to the present application as an arithmetic computer, and 1
4 is a CP that executes the heat conduction simulation processing program 15 of the real-time simulation processor 4;
tJ.

16 is a vector processor that executes various vector calculation instructions; 17 is a vector processor calling subroutine that is called from the vector-expanded heat conduction simulation processing program 15;

Figure 2 shows the heat conduction simulation processing program 15.
represents the grid point of the thick plate to be calculated, and since the heat conduction calculation logic on the Y-Z plane is constant regardless of the value of X, Calculate as a vector.

Figure 3 shows the heat conduction simulation processing program 15.
1 is a schematic flowchart.

Next, the operation will be explained.

The control application program 2 on the cooling line control computer 1 calls a simulation request subroutine 3 when it becomes necessary to perform a simulation. The subroutine 3 starts the heat conduction simulation processing program 15 in the real-time simulation processor 4 through the serial transmission line 10 and at the same time passes data 7 necessary for calculation. When the heat conduction simulation processing program 15 receives the data 7, it starts the vector processor 16 using various vector processor calling subroutines 17, executes vector operations, and sends the obtained simulation result 8 to the simulation request subroutine 3. Send it back. The simulation request subroutine 3 notifies the control application program 2 of the completion of processing and also passes the result 8.

Here, the calculation algorithm of the heat conduction simulation processing program 15 is a normal two-dimensional heat temperature equation solving algorithm, as shown in steps 22 to 27 in FIG. As shown in 1, all three-dimensional coordinates of the grid points are calculated at once as a vector.

In the above embodiment, a heat conduction simulation was shown, but when it is desired to perform large-capacity calculations in real time such as image processing, the same effects as in the embodiment can be achieved by vector expansion.

Further, in the above embodiment, the real-time simulation processor 4 and the control diameter calculator 1.9 are connected by the serial transmission line 10, but a parallel transmission line may also be used.
The same effects as in the above embodiment are achieved.

(Effects of the Invention) As described above, according to the present invention, a computer that specializes in real-time simulation is realized by a combination of a CPU and a vector processor, and can be used by multiple control computers via a transmission path. The system is inexpensive because of the configuration.

Moreover, there is an effect that a product with high performance can be obtained.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram showing an embodiment of this invention, Fig. 2 is a conceptual diagram of a processing target in an embodiment of this invention, and Fig. 3 is a schematic flowchart of software forming the main part of this invention. For example, FIG. 4 is a system configuration diagram showing a conventional example. 1... Control computer, 2... Control application program, 3... Simulation request subroutine, 4... Real-time simulation processor (calculation computer) 7... Heat conduction simulation processing program start signal and calculation Data, 8... Result data, 9... Control computer, 10... Serial transmission path, 11.12.13... Transmission station, 14.
...CPU, 15...Heat conduction simulation processing program, 16...Vector processor, 17...
Vector processor calling subroutine. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa (and 2 others) Procedural Amendment (Volunteer 1. Indication of the case Patent Application No. 102354/1988 2)
Name of the invention: Computer system for process control 3, Representative of the person making the amendment: Moriya Shiki 5, Claims to be amended, Detailed description of the invention. 6. Contents of amendment (1) The scope of claims will be amended as shown in the attached sheet. (2) "Simulation" in the third line of page 2 of the specification is corrected to "simulation". (4) In the second line of page 4 of the same book, the phrase ``heated run'' was replaced with ``
Correct as "heating line". (5) In the 7th line of page 4 of the same book, "firmware" is corrected to "firmware." (6) On page 6, line 20 of the same book, the text “heat conduction calculation logic” is [vJ! Conduction calculation logic” and correct it. Above 2, the claims include a control computer that executes process control and an arithmetic computer connected to this control computer via a transmission path, and when the need for simulation arises in the control computer, the control The operating computer issues a simulation request to the operating computer, and upon receiving this request, the operating computer executes the simulation calculation based on the operation data sent from the control computer and sends the result. In a process control computer system configured to notify a control computer, the arithmetic computer includes a vector processor that executes vector arithmetic instructions, and software that causes the vector processor to process simulation calculations requested by the control computer. A process control computer system characterized by comprising:

Claims (1)

[Claims] Equipped with a control computer that executes process control and an arithmetic computer connected to this control computer via a transmission path, when a simulation is required in the control computer, the control computer becomes the arithmetic computer. A process control computer system in which a simulation request is issued to a computer, and the calculation computer that receives the request executes simulation calculations based on the calculation data sent from the control computer, and notifies the control computer of the results. A process control computer system, wherein the arithmetic computer includes a vector processor that executes vector arithmetic instructions, and software that causes the vector processor to process simulation calculations requested by the control computer.