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Control device and alternative selection program

A technology of control device and control system, applied in the direction of program control, computer control, comprehensive factory control, etc., can solve the problems of system failure, unable to meet the requirements of switching time, long processing time, etc.

Inactive Publication Date: 2019-12-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the k-out-of-n method is hardly used in the field of strict control of real-time performance requirements
[0009] When a failure occurs, if the processing time required until recovery is long, the switching time requirement cannot be satisfied, causing serious failure of the entire system
Especially in order to select a replacement machine, the process of reaching an agreement between devices is complicated and takes time

Method used

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  • Control device and alternative selection program
  • Control device and alternative selection program
  • Control device and alternative selection program

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] according to Figure 1 to Figure 5 , when the control device fails, the method for executing the process executed in the failed control device in the normal control device will be described.

[0047] ***Description of structure***

[0048] figure 1 A control system 100 is shown in . The control system 100 is what is called a factory system.

[0049] The control system 100 includes a plurality of control devices 200 , a plurality of input / output devices 101 , a plurality of equipment 102 , a network 103 , and production equipment 104 . I / O is short for input output.

[0050] The control device 200 communicates with the input / output device 101 via the network 103 , and controls the equipment 102 via the input / output device 101 .

[0051] Specifically, the control device 200 receives the state of the device 102 from the input and output device 101 and issues a command to the input and output device 101 .

[0052] The equipment 102 is equipment such as an actuator and...

Embodiment approach 2

[0139] For the storage method of the selection table for shortening the time required for the alternative selection, it is mainly based on Figure 6 ~ Figure 8 , and points different from Embodiment 1 will be described.

[0140] ***Description of structure***

[0141] according to Figure 6 , illustrating the structure of the selection table 212.

[0142] The selection table 212 is stored in the memory area from the base address. The base address is a memory address determined as the start address of the selection table 212 .

[0143] Selection table 212 has the same number of individual fields as there are failure modes. In the case where the number of control devices 200 is N, the selection table 212 has 2^N individual areas.

[0144] In a separate area, set the process information corresponding to the failure mode.

[0145] A separate area is a portion of a memory area identified with a memory address obtained using a binary value representing a failure mode.

[0146...

Embodiment approach 3

[0169] For the way of producing the selection table, it is mainly based on Figure 9 ~ Figure 14 , and points different from Embodiment 1 and Embodiment 2 will be described.

[0170] ***Description of structure***

[0171] according to Figure 9 , the structure of the control device 200 will be described.

[0172] The control device 200 further includes a generation unit 220 as a software element.

[0173] Instead of the selected program, the computer functions as the generation unit 220 .

[0174] according to Figure 10 and Figure 11 , to illustrate the structure of the selection table 213.

[0175] The selection table 213 has columns for row number, failure mode, process information.

[0176] The column marked with row number is the row number column.

[0177] Columns 1 to 5 are failure mode columns.

[0178] In the first column to the third column, control system identifiers (m 1 、m 2 、m 3 ). The control system identifier identifies the control device 200 of ...

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PUM

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Abstract

According to the present invention, a detection unit (202) detects a failure of at least one of a plurality of control devices provided in a control system. A selection table associates a failure pattern and process information with each other. The failure pattern is a combination of a normal control device and a failed control device. The process information indicates a process or unnecessity. Aselection unit (210) selects, from a selection table, process information associated with the failure pattern of the control system. When the selected process information indicates a process, an execution unit (203) executes the process indicated by the selected process information.

Description

technical field [0001] The present invention relates to a technique for selecting an alternative machine in the event of a failure of a control device. Background technique [0002] In a factory system, the control unit of the control equipment is multiplexed. [0003] The way to reuse is classified by how to make it redundant. A method in which one device is prepared for backup is called a 1:1 method. On the other hand, a method of preparing n devices for backup for k devices is called a k-out-of-n method. In the k-out-of-n method, as long as there are n or less failures, the system can be continued no matter what combination of devices a failure occurs in. [0004] In the 1:1 mode, the structure and action are simple and easy to understand. In addition, when a failure occurs, the time required for switching from the control system to the standby system is short. [0005] However, since twice as many devices are required, the cost is high. [0006] The k-out-of-n meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/03G05B19/048
CPCG05B9/03G05B19/4184G05B2219/24182G05B2219/14018G05B2219/34482G05B19/0428Y02P90/02G05B19/048
Inventor 塚本洋平
Owner MITSUBISHI ELECTRIC CORP