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Computing unit, engineering design tool and storage device storing engineering design tool program

An engineering design tool and computing unit technology, applied to electrical program control, program control in sequence/logic controllers, instruments, etc., can solve problems such as program execution cycle delay and large data volume

Active Publication Date: 2018-11-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In a duplex system, the program execution cycle of the control system may be delayed due to the large amount of data in the tracking process from the control system to the standby system.

Method used

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  • Computing unit, engineering design tool and storage device storing engineering design tool program
  • Computing unit, engineering design tool and storage device storing engineering design tool program
  • Computing unit, engineering design tool and storage device storing engineering design tool program

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Experimental program
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Embodiment approach

[0024] figure 1 It is a figure which shows the programmable logic controller and engineering design tool which comprised the duplication system using the arithmetic unit which concerns on embodiment of this invention. The programmable logic controller 10 of the embodiment has two computing units 11 called CPU (Central Processing Unit) units. 1 、11 2 And constitute a dual system. In addition, for the units constituting the programmable logic controller 10, the operation unit 11 is omitted. 1 、11 2 Illustration of other units.

[0025] Arithmetic unit 11 1 is the control system, the arithmetic unit 11 2 It is a standby system. Arithmetic unit 11 1 Connect with engineering design tools.

[0026] Arithmetic unit 11 1 、11 2 It is the relationship between the control system and the standby system, so they have the same structure. In the following description, in the operation unit 11 1 、11 2 When describing the common items, they will be referred to as the operation un...

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PUM

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Abstract

A computation unit (11), has: a program command processing unit (111) for executing a control application (124) including a plurality of program commands and generating program execution result data (121), and for recording in a program execution result table (122) whether or not individual program modules obtained by forming modules from one or more program commands in the control application (124) have been executed; a transfer address management memory (115) for storing a reference address management table (123) in which the recording destination for the program execution result data (121) is defined for each of the program commands; and a tracking process unit (113) for performing, on the basis of the reference address management table (123) and the program execution result data (121), a tracking process on the program execution result data for a program command contained in the program module executed by the program command processing unit (111).

Description

technical field [0001] The invention relates to a calculation unit, an engineering design tool and a storage device storing the program of the engineering design tool. The calculation unit constitutes a programmable logic controller of a duplex system. Background technique [0002] In a duplex system, since the amount of data in the tracking process from the control system to the standby system is large, the program execution cycle of the control system may be delayed. [0003] In Patent Document 1, a technique is known in which a subroutine is programmed using only one continuous memory area in advance, and one continuous memory area corresponding to the subroutine is programmed depending on whether or not the subroutine is executed. region for forwarding. According to the method described above, reduction in the amount of data in the tracking process from the control system to the standby system is achieved. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2008-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B9/03G05B19/05
CPCG05B9/03G05B19/05
Inventor 津野吉德
Owner MITSUBISHI ELECTRIC CORP