JPS59154503A - Process controller - Google Patents

Abstract

PURPOSE:To increase an overall arithmetic speed and to modify or add a program easily by using a microprogram for arithmetic processing which has a high execution frequency and requires a high speed, and adding the microprogram to standard instructions. CONSTITUTION:A process controller 11 when used for flow control over a city water system 12 inputs a flow rate signal from a flow-meter 13, the state signal of a pump 14, etc., and performs arithmetic for maintaining a preset flow rate to outputs operation commands to the pump 14 as a stop command and an opening extent adjusting signal to a discharge valve 15. A main storage device 23 has a target program for performing GET processing for each parameter and a CPU21 reads and executes the microprogram in a storage device 22 according to instructions of the target program. Consequently, the arithmetic speed of the process controller 11 is improved remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a process controller for controlling various equipment constituting a plant or the like, and relates to an improvement in its arithmetic processing means.

[Technical background of the invention and its problems]

As you may know, a process controller is a system that controls the controlled devices that make up a plant, etc., and the input signals generated therefrom.
Performs predetermined arithmetic processing based on preset values, etc.
Based on the results, the target condition is controlled.

In this way, the process controller performs various operations W for control purposes, and the operations 1j have conventionally been broadly classified into the following three methods. Process as the first method! : I', report processing for control.
The central processing bag interprets and executes only i (hereinafter referred to as the CPU) by means of the load commands. The third method is to convert all the contents of the CPU's memory device into a microprogram for processing the corresponding processor.
U mark 1'': There is a method of using a special arithmetic processor to execute calculations suitable for process control ((U!!Eha, Pittle-level logical operations, etc.) that are lacking in life span. .

However, in the case of the first method, although it is suitable for processing multi-pay f7C4C contents, it is not suitable for processing simple processes at high speed because the execution speed is slow. It becomes irrelevant. Also, the second. In the case of method 2, the standard operating system of the CPU becomes obsolete with use, so it becomes necessary to develop and develop a new system. Also, if you create a microprogram to process multiple and new calculations, the object that one microprogram processes becomes too difficult to handle, and it is one size smaller in terms of your memory capacity. From a point of view, it is not practical. l>, in case of method 3, CPU
In addition, it is necessary to design the hardware of the processor and the processor separately, and the entire hardware becomes non-volatile.

[Purpose of the invention]

The purpose of the present invention is to obtain the 'Jf! of CPT-J! Using the monument, threats, and hardware as is, I created a microprogram with a simple shortcut that requires a high degree of execution detail when executing arithmetic shortcuts and requires a Toren tanban, and added it to my microprogram. The objective is to create a process controller that can improve the overall processing speed without requiring any special hardware.

[Respect for the invention]

The process controller according to the present invention includes an input/output file that stores the Okawa force signals for the controlled equipment at predetermined addresses, and a setting value file that stores the setting values necessary for controlling the controlled equipment at predetermined addresses. , a file for storing intermediate results of processing at a predetermined address, a microprogram of the central processor, a processing device, and a microprogram of the central processing device, and the corresponding ones of each of the above files. A microprogram that executes the reading process and the loading process into the corresponding one, the control i memory that stores it, and the creation of the controlled board.
The code representing the operation 9 contents required for this operation and the input/output parameters necessary for this operation are written in the code representing its storage location.
('=lrl', intermediate code 1 sound 1) and take from the storage location set for each input parameter stored in this intermediate code storage section. A program for the purpose of actually executing the reading/extracting microphrogram stored in the control storage device in order to extract the contents; An objective program created from the standard micro block stored in the fusaya 1 Zuboku Era control storage unit,
Stored in the intermediate code storage section are object programs that are set for each of the output parameters and execute a reading microprogram stored in the control storage device in order to write the result of the calculation to the corresponding storage location. This is a top view of the target program storage section.

[Embodiments of the invention]

The present invention will be explained in detail below with reference to the examples shown in the drawings.

FIG. 1 shows a separate configuration when a process controller (hereinafter referred to as controller) 11 of the present invention is applied to control the flow 1) of a water system 12. The controller 11 inputs the flow meter 1 signal from the flowmeter 3 and the status G1 (operation of stop) of the sensor 14, and performs calculations to adjust the preset flow section setting value. Pump that ml vermilion] 4
The operation command 2 is applied as a stop command and a discharge +1+ valve 15 opening adjustment signal.

As shown in FIG. 2, the hardware structure of the controller 11 has a central processing unit (hereinafter referred to as CPIJ) 2X, and microprograms such as commands for the CPU 21 are stored externally to the CPU 21. It is provided with a control storage device 22 for storing therein and a main storage device 23 for storing object programs to be described later, and also has input/output devices 4 and the like necessary as a controller.

Figure 3 shows the data file structure inside the controller 11. These data files are stored in the main memory 23. will be accomplished. In addition, input/output device 24CP in the figure
U21empty- is omitted. In the figure, 26 is an analog input file, which is an analog input file from the flowmeter 13 (
The flow rate value PVn) is stored at a predetermined address.

27' is a digital input file, which stores digital input (pump operation or stop) from the status contact 14a of the pump 14 at a predetermined address. Reference numeral 28 is a setting file, which contains orange settings (SVn, Kp, TI
.

TD, B) are stored at predetermined addresses, respectively.

Reference numeral 29 denotes an intermediate code storage section, which stores the language expressing the predetermined operation (PID operation) and the input 113 parameters necessary therefor in intermediate code, which will be described later.

30 is an intermediate result storage file, which stores intermediate results (en, en-1, PVn-
1.

PVn-2) is stored at a predetermined address. 31 is an analog output file, which stores the analog output (valve opening adjustment value ΔMV) which is the result of the predetermined operation q, at a predetermined address. 32 is a digital output file, which is a digital output that is a predetermined calculation result (pump start/stop command)
is stored at a predetermined address.

Now, looking at the day operation, which is the predetermined operation, one statement of the source program has the following trace. r PID (SVn, PVn, PV
ni, PVn-z, Kn, TI, TD, Δt, en-
x, en-2, ΔM■.

en ) J By this, l-PID l represents the calculation content, and the parentheses represent the input/output parameters necessary for this calculation. In other words, the input parameters are [' SVn j , [
PVn J.

= [en-I J, output parameter υ, ``ΔM
V-1 and renJ.

All source programs are stored in the intermediate code storage section 29 of the main storage device 23, as shown in FIG. As shown in Fig. 5, the specific storage state of parameters is as follows: ``For PID J, an intermediate code ``10'' corresponding to the gun and contents is stored, and for other input/output parameters, those data are stored. The file numbers listed in Figure 3 and
Stores intermediate codes in combination with addresses within the file. For example, for [S'Vn J, stiffness is the setting value, so an intermediate code is stored that is a combination of the setting value (file numbers 1-6 of file 28) and address "2" in that file. [PVn
Since j is an analog input (flow rate value), an intermediate code is stored that is a combination of the file number "5" of the analog input file 26 and the address "3" within that file. In the same manner, intermediate codes are stored up to en j, each consisting of a combination of the file number of the corresponding file and the address within that file.

Next, the contents of the control storage device 22 shown in FIG. 2 will be explained with reference to FIG. 4. In the figure, 31 is the CPU shown in Figure 2.
Standard commands for 21, e.g. +, -1÷.

This is a microprogram for the CPU 21 to actually execute various operations such as X. 32 is data from the corresponding file, which is a simple process that is executed frequently; □ter1
This is a microprogram that executes a fetch process (hereinafter referred to as a GET process). 33 is a microprogram for writing a calculation result to a corresponding file (hereinafter referred to as PUT process), which is a simple process that is also frequently executed. 34 is a microprogram that performs simple and high-speed arithmetic processing, for example, one bit-based logical operation.

Next, referring to the main memory 23, the object program details 36 will be explained. [-GET (SVn) J,
1 GET(PVn)j, −'j' GET(c
n-1), 1 digit, coin [7 meters per person] [sVn
J, [PVnJ, "en-1,, J@
In the α and j programs set up in the above, respectively? The control section 11 is used to execute the microprogram 32 for GET processing stored in the storage device 22. "
The PIT operation is constructed using a standard instruction microprogram 31 stored in the control memory 22 to perform a predetermined PID operation. I″PT
, JT (ΔMV)j, l PUT (en)
J is each output variable make “△MVJ j−e
This is a target program set for each nj, and is for executing a microprogram 33 for PUT processing stored in the control storage device 22, respectively.

FIG. 6 shows a schematic flowchart for performing calculations by unpacking intermediate codes stored in the main memory. The program reads input parameters at step 38.
, PTD calculation step 39. It can be roughly divided into three steps: output parameter writing step 4o.

GET of input parameters at M output 2 step 38
In Chekuri, the input parameter l-SVn J.

5' reads the intermediate code of r PVn J and finds its qi r+++ address on the main memory. In other words, the file number fl+ shown in FIG. 5, which is the IKI'j code in the input parameter, is
Furthermore, the relative number e in the file is multiplied by 77 from the address number, the address in the main memory where the data is stored is found, and the data is extracted from that address.

In the PTD calculation step 39, a PID calculation is performed based on the data retrieved and data obtained in the GET process. in this case,
(J)U2] takes one instruction at a time from the "object program I-PID operation" in the main memory 23 shown in FIG.
Execute the standard instructions sequentially.

PUT in actual step 4o of output parameters
In the process, the output parameter "Δλ■" which is the result of the PID performance algorithm and the intermediate code of renJ are decoded, and the results are stored in the corresponding file address in the main QF memory.

Here, to explain the GET process in detail, as shown in FIG. 7, the main Kii device 23 has a target program for executing the GET process for each input parameter. CPU 2] According to the instructions of this target program,
It takes the microprogram 32 stored in the control storage device 22 (+ET processing) and executes it.

In contrast, conventionally, as shown in FIG. 8, the main storage device 23 is provided with a
The PU 21 takes out one instruction from the ()ET processing subroutine for each input parameter and sequentially executes the standard instructions. In this way, in the conventional method, when performing GET processing, one instruction is extracted from a subroutine composed of standard instructions on the main memory and processed. Microprogram 32 dedicated to GET processing stored in 22? : It takes 2 to 3 times as long as taking it out and processing it. The same applies to the PUT processing plj. Furthermore, the same applies to logical operation processing on a bit-by-bit basis. From this, the calculation speed of the process controller according to the present invention is greatly improved.

〔Effect of the invention〕

As described above, the present invention utilizes the CPU's calculations and instructions to its full potential, and is capable of processing processes that are frequently executed and require high-speed processing, such as data recommendation from a file. The process of extracting data and writing data into files is made into a microprogram and added to the @ quasi-instruction, so C
It is possible to use up to 7 times the operating system of the PU magnification, the overall calculation speed is improved, and it is easy to change or add programs.

4, [113(7) ffri sheep Explanation FIG. 1 is a block diagram showing an example of application of the process controller according to the present invention, and FIG. 2 is a block diagram showing an example of the process controller according to the present invention and its hardware configuration. 73 is a diagram showing the structure of the data file in the process controller of the present invention shown in FIG. 2, FIG. 4 is a diagram showing the contents of the main storage device and control storage device shown in FIG. 2,
FIG. 5 is a diagram showing the state of the intermediate code storage section shown in FIG. FIG. 8 is a block diagram showing the state of GET processing in the conventional process controller.

DESCRIPTION OF SYMBOLS 11... Process controller, 12... Controlled system, 21... Central processing unit, 22 Control storage device,
23... Main storage device, 26.27.31.32... Input/output file, 28... Setting value file, 29... Intermediate code storage section, 30 Intermediate result file.

31... Standard instruction microprogram, 32... Product,
Mi It' L, Micro program for processing 1233 Micro program for processing processing 36 Purpose program storage section, (7317) Agent Orator Noriyuki Chika (
(1 person) Figure 1 Figure 2・-15- Figure 4 Figure 7) Figure 23 16-

Claims (1)

[Claims] An input/output file that stores large force signals for the controlled equipment at predetermined addresses, a setting value file that stores the setting values necessary for controlling the controlled equipment at predetermined addresses, and an intermediate result of processing. A file to be stored at the address of PJi 'R, a central processing unit, a microprogram of standard instructions for this central processing unit, and processing for reading from and writing to the corresponding file in each of the above files. a control storage device that stores microprograms to execute each, and an intermediate code that stores codes that represent the contents of calculations essential for controlling the controlled equipment and input/output parameters necessary for these calculations as codes that represent the data storage locations. a storage unit, and an object program for executing a reading microprogram stored in the control storage device in order to read data from a storage f-location that is set for each input/output parameter stored in the intermediate code storage unit; A p-like program composed of a microprogram of Yanagi instructions stored in the raw control storage unit to execute the calculation contents stored in the intermediate code storage unit, and output parameters stored in the intermediate code storage unit. A process controller similar to an object program storage section storing object programs for executing a reading microprogram stored in the control storage device in order to write the result of the above calculation into the corresponding storage location.