JPS62144286A - Data collecting device - Google Patents

Abstract

PURPOSE:To simplify a device and to facilitate data analysis by outputting data from the prescribed area in a shared memory to a control part through a printed circuit board installed in the idle slot of a common bus. CONSTITUTION:The printed circuit board 2 is installed in the idle slot of the common bus 9 of an arithmetic control part 1. The printed circuit board 2 is composed of a data input part 13 inputting data from the prescribed area in the shared memory 7 of the arithmetic control part 1 according to an instruction from the control part 3, an interface 14 exchanging signals between the control part 3 and itself and an internal memory 15 temporarily holding the data from the shared memory 7. The control part 3 supplies the data from the printed circuit board 2 to an output part 4.

Description

[Detailed Description of the Invention] A. Industrial Field of Application The present invention relates to a data collection device, and in particular to a data collection device that uses a computer to collect values, calculation results, etc. that are being processed by the computer. It is related to the device.

B3 Summary of the Invention The present invention provides a control device or the like that uses a common bus type computer system, in which the target computer system is a common bus type and all data is in a shared memory on a common bus, and the shared memory is transferred from an empty slot to the shared memory. Makes memory accessible and 1n
By storing data on the printed board, a high-performance data collection device that is easy to analyze can be obtained.

C0 Conventional technologyWith advances in digital technology, especially computer technology,
Devices that were conventionally controlled using analog circuits are increasingly being controlled using computer-based control devices. Control parameters are generally required to start up a control device, and for this reason, in conventional analog circuits, test pins are provided to externally detect values at several points on the circuit, and these are connected to a tester, recorder, etc. The method used was to recognize the state of the circuit by testing it.

In a control device using a computer, there is generally no equivalent to the test pins of these analog circuits, and the following method is used to deal with this.

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

(2) A method of providing analog output or digital output means corresponding to test pins and selectively outputting necessary data.

(3) For simple control, a method of determining parameters using only the control output.

D6 Problems to be Solved by the Invention Of the methods described above, the method in item (3) can be used for simple control such as single loop control, but it cannot be used for somewhat complex control with many control parameters. , detailed parameters cannot be set. Furthermore, although the methods described in (1) and (2) can be expected to have effects equivalent to or better than test pins in conventional analog circuits, on the other hand, corresponding hardware and software are required for purposes other than the original control purpose. It is disadvantageous in some respects. That is, the method in item (1) requires a storage device for data collection and recording, and also requires a man-machine interface to display data in a way that humans can judge. The method in item (2) requires analog output means and digital output means for purposes other than control, and means for selecting data is also required for purposes other than the original purpose. All of these have been obstacles to simplifying, downsizing, and lowering the cost of the control device.

E1 Means for Solving Problems The present invention has been made in view of the above-mentioned problems. The printed board includes a control section provided outside the control section, and the printed board includes a data input section that receives instructions from the control section and inputs data from a predetermined area of the shared memory of the arithmetic control section; and an internal memory for temporarily holding data from the shared memory, and the surface layer control section supplies data from the printed board to the output section. A data collection device featuring:

F. EXAMPLES The present invention will be specifically explained below using examples shown in the drawings.

In the drawings, 1 is an arithmetic control section, 2 is a printed board, 3 is an output control section, and 4 is an output section. The arithmetic control unit 1 includes a computer system 5, and the computer system 5 includes a computer 6 as a central processing unit, 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 type, and all the data to be collected is 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, any computer system that uses a multipath standard rack and stores intermediate data in the shared memory 7 corresponds to this system.

The printed circuit board 2 is installed in an empty slot of the common bus 9, and is operated by a local computer 13 as an input section, an interface 14 with the control section 3, and an internal memory 15 that temporarily stores data from the shared memory 7. It is configured. The output section 4 of the control section 3 is a graphic 10.
It is composed of a printer 11 and a floppy disk 12. All data processed by the computer 6 is stored in a predetermined memory on the shared memory 7,
The local computer 13 of the printed board 2 continuously inputs data from a predetermined area of the shared memory 7 according to instructions from the control section 3, and stores programs in the internal memory 15 sequentially, as well as other instructions from the control section 3. It has a program that transfers the contents of the internal memory 15 to the control unit 3 by using the program. The predetermined area is an area in which data to be collected is stored.

In the data collection device having the above configuration, first, the control unit 3 starts inputting data to the local computer 13 of the printed board 2. Upon receiving the instruction to start data input, the local computer 13 manually inputs data from a predetermined area of the shared memory 7 at a constant sampling period, and stores the data in the internal memory 15.
Store them in sequence. The control unit 3 instructs the local computer 13 of the printed board 2 to select and output data under a certain condition from the data group stored in the internal memory 15.

The constant condition is, for example, every 10 samples.

The local computer 13 of the printed board 2 further sequentially outputs predetermined data to the control section 3 via the interface 14 according to another instruction from the control section 3.

As a result, the control unit 3 displays the content as a graph on the graphic 10 and prints out the content on the printer 11. Save the necessary data on the floppy disk 12,
Used for later analysis.

Through the above procedure, the values processed by the computer 6 of the target arithmetic control unit l, calculation results, etc. are collected as data, recognized in a graph, and recorded on the printer.
Data can be stored on floppy disk 12.

Examples are given below to demonstrate the usefulness of the present invention. (a) The data input program of the local computer 13 inputs data from the shared memory 7 on the multipath to the internal memory 1 at a constant sample period from multiple different data areas.
5, so for example, 8 points of data can be input at 10 millisecond intervals, and this allows you to simultaneously check the time change of 8 points of data on the graphic 10, and change the manipulated variable in control and process 1. , it is possible to intuitively grasp the followability of the process amount to the set value.

(b) Since the data stored in the internal memory 15 of the printed board 2 is retained until the next data manual instruction is received from the control unit 3, it can be transferred from the control unit 3 with changing conditions as many times as necessary. . As a result, for example, first, rough data for every 10 samples is displayed on Graphic 10,
- Flexible data collection is possible, such as checking detailed data for each sample, first looking at all graphs of eight data points, and then looking at the relationship between two specific points.

(C) The above embodiment has an internal memory 15 for temporarily holding data on the printed circuit board 2, but if there is an empty area (room) in the shared memory 7 of the target computer system, the internal The same operation is possible even if this is used instead of memory.

G. Effects of the Invention The present invention is as described above, and the following effects can be obtained.

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

(2) With (1), even when setting control parameters for a complicated control method, fine-grained handling is possible, such as determining the parameters sequentially while checking the contents of each point in the control loop.

(3) By displaying data graphically, changes in data over time can be perceived intuitively, making it easier to recognize control status.

(4) Since the controller can input the same data that is processed by the control device's computer, 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 hinder miniaturization and cost reduction of the control device.

(6) Since the data is held in the internal memory, it can be output many times under different conditions, allowing flexible data collection.

[Brief explanation of drawings]

The drawing is a block diagram of a data collection device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 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..Graphics, 1
1...Printer, 12...Floppy disk, 13
・Local computer, 14...interface,
15...Internal memory.

Claims (1)

[Scope of Claims] A printed board installed in an empty slot of a common bus of a calculation control section, a control section connected to the printed board and provided outside the calculation control section, and an output section of the control section. The printed board transmits and receives signals between the control unit and a data input unit that inputs data from a predetermined area of the shared memory of the arithmetic and control unit in response to instructions from the control unit. A data collection device comprising an interface and an internal memory for temporarily holding data from the shared memory, wherein the control section supplies data from the printed board to the output section.