JPH0731689B2 - Data collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a data collecting device, and more particularly to a data collecting device for collecting a value processed by a computer, a calculation result, etc. in a control device or the like using a computer. It relates to the device.

B. Outline of the Invention In the present invention, in a control device or the like using a common bus system computer system, the target computer system is a common bus system, and all data is in a shared memory on the common bus. By making the shared memory accessible, it is possible to obtain a high-performance data collection device that is easy to analyze.

C. Conventional Technology Due to the progress of digital technology, especially computer technology,
Opportunities for controlling devices, which have been controlled by analog circuits in the past, by control devices using computers are increasing. A control parameter is generally required to start up a control device, and therefore, in a conventional analog circuit, a test pin for externally detecting a value at some point on the circuit is provided,
By testing this with a tester, recorder, etc., a means to recognize the state of the circuit was adopted.

In a control device using a computer, generally, there is no one corresponding to the test pin of these analog circuits, and the following method is adopted.

(1) A method in which the computer itself has data collection and recording functions.

(2) A method of selectively outputting necessary data by providing an analog output or digital output means corresponding to the test pin.

(3) If the control is simple, a method of determining the parameter only by the control output.

D. Problems to be Solved by the Invention Of the above methods, the method of (3) can be applied to simple control such as single loop control, but it is somewhat complicated control and has many control parameters. Then, it is not possible to set fine parameters. In addition, the methods of the items (1) and (2) can be expected to be effective as a test pin in a conventional analog circuit or more, but on the other hand. It is disadvantageous in that corresponding hardware and software are required for purposes other than the original control purpose. That is, the method of the item (1) requires a storage device for collecting and recording data, and a man-machine interface for displaying the data so that a person can judge it. The method of the item (2) requires analog output means and digital output means other than the purpose of control, and means for selecting data other than the original purpose. These all hindered simplification, miniaturization, and cost reduction of the control device.

E. Means and Actions for Solving Problems A printed circuit board installed in an empty slot of the common bus of the arithmetic control unit and a control unit connected to the printed circuit board and provided outside the arithmetic control unit. The printed board includes a data input unit that receives an instruction from the control unit and inputs data from a predetermined area of the shared memory of the arithmetic control unit, and a communication unit that outputs the data to the control unit. The control unit displays the data from the printed board on the output unit.

F. Examples The present invention will be specifically described below with reference to Examples shown in the drawings.

In the drawings, 1 is a calculation control unit, 2 is a printed board, 3 is an output control unit, and 4 is an output unit. The arithmetic control unit 1 is composed of a computer system 5, and the computer system 5 is constituted by a central processing unit 6, a shared memory 7, a parallel input / output interface 8 and a common bus 9. That is, the computer system 5 is of a common bus system, and all the data to be collected are in the shared memory 7, and the shared memory 7 can be accessed from an empty slot. Such a system is not special, for example, a computer system using a multi-bus standard rack, and any system that stores intermediate data in the shared memory 7 corresponds to this.

The printed board 2 is installed in an empty slot of the common bus 9 and has a local computer 13 as an input section. Control unit 3
And a communication means 14 for transmitting and receiving data to and from. The output unit 4 of the control unit 3 is a google 10, a printer 1.
1 and the floppy disk 12 are included. All the data processed by the computer 6 is stored in a predetermined memory on the shared memory 7, and the local computer 13 of the printed board 2 receives data from a predetermined area of the shared memory 7 according to an instruction from the control unit 3. Are continuously input and sequentially output to the control unit 3. The predetermined area is an area in which data to be collected is stored.

In the data collecting apparatus having the above structure, the control unit 3 first instructs the local computer 13 of the printed board 2 to start data input. Upon receiving the instruction to start data input, the local computer 13 inputs data from a predetermined area of the shared memory 7 in a fixed sample synchronization and sequentially outputs the data to the control unit 3 via the communication unit 14. When the data from the shared memory 7 are sequentially input, the control unit 3 displays them as a graph on the graph 10 and prints the contents on the printer 11. In addition, the necessary data will be saved in the floppy disk for later analysis.

According to the above procedure, data such as values and calculation results processed by the computer 6 of the target arithmetic control unit 1 are collected, recognized as a graph, and recorded in the printer.
The data can be stored on the floppy disk 12.
Further, no hardware prepared inside the arithmetic control unit 1 for data collection is required, and the internal data of the computer 6 at that time can be referred to while the arithmetic processing unit 1 is operating. Further, it is effective when operating the arithmetic and control unit 1 by continuously changing the control parameters to search for the optimum parameters, and these data can be perceptually recognized by the graph 12 and the data are Since the data is handled by the computer 6, it is also useful for subsequent analysis.

G. Effect of the Invention The present invention is as described above, and the following excellent effects are obtained.

(1) The internal data of the control computer can be taken out and confirmed.

(2) According to (1), even when setting the control parameters of a complicated control method, finely tuned correspondence can be made, such as sequentially deciding the parameters while observing the contents of each point of the control loop.

(3) By displaying the data graphically, the time change of the data can be perceived intuitively and the control state can be easily recognized.

(4) Since the controller can input the same data as that processed by the computer of the control device, data analysis based on this data can be easily performed.

(5) Because of (1) to (4), no special hardware or software is required in the control device, which does not prevent downsizing and cost reduction of the control device.

(6) Since the input data is immediately displayed as a graph, the graph has immediacy and continuous control parameter setting is possible.

[Brief description of drawings]

The drawing is a block diagram of a data collection device according to an embodiment of the present invention. 1 ... Arithmetic control unit, 2 ... Printed board, 3 ... Control unit, 4 ... Output unit, 5 ... Computer system, 6 ... Computer,
7 ... Shared memory, 8 ... Parallel input / output section, 9 ... Common bus, 10
... Graphic, 11 ... Printer, 12 ... Floppy disk, 13 ... Local computer, 14 ... Communication means.

Claims (1)

[Claims] 1. A computer, a shared memory, an arithmetic control unit having an interface and a common bus, a printed circuit board installed in an empty slot of the common bus of the arithmetic control unit, and an external unit of the arithmetic control unit. And a control unit for receiving data from the printed circuit board and an output unit for receiving an output signal of the control unit. The printed circuit board is shared by the arithmetic control unit in response to an instruction from the control unit. It is composed of a data input section for inputting data from a predetermined area of the memory and a communication means for outputting the data to the control section, and the output section is for inputting data from the printed board through the control section. A data collection device comprising a means for displaying, printing, and storing data.