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sequence control device

A sequence control and functional technology, applied in the direction of electrical program control, program control in sequence/logic controller, etc., can solve problems such as gaps, difficulty in grasping state changes, and users' lack of easy acceptance

Active Publication Date: 2021-02-02
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Currently, the ladder language, which is the mainstream programming language for sequence control devices, is suitable for describing combination control, etc., but it is difficult to grasp state changes
In order to improve this point, SFC language can also be used. However, due to the gap in the description method between the ladder language and the ladder diagram language, the reality is that users do not easily accept it.

Method used

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Embodiment approach

[0025] figure 1 It is a block diagram showing the overall configuration of the sequence control device 100 at the time of simulation according to the embodiment of the present invention. and, figure 2 It is a block diagram showing the overall configuration of the sequence control device 200 during actual operation according to the embodiment of the present invention. In addition, in figure 1 , 2 Among them, the dotted line shows the control signal, and the solid line shows the data signal.

[0026] In the present invention, the sequence control device 100 at the time of simulation and the sequence control device 200 at the time of actual operation operate with the same functional specifications. Therefore, from the perspective of the developer of the user application, both are the same. However, the difference in the structure of the two is that in figure 1 In the sequence control device 100 at the time of the simulation shown, all the function updating units 110 are in...

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Abstract

The sequence control device has: a user-defined function execution unit that executes a user-defined function program written by a user application developer; a system function execution unit that executes a system function program written by an expert who manages the operation of the control system; and an output monitoring function. The execution unit executes the output monitoring function program described by experts for the exception handling operation of the control system; and the function updating unit updates each function program of the user-defined function, system function, and output monitoring function. It is characterized in that the function update unit can independently describe each function program in a table form.

Description

technical field [0001] The present invention relates to sequence control devices. Background technique [0002] Currently, the ladder language, which is a mainstream programming language for sequence control devices, is suitable for describing combination control and the like, but it is difficult to grasp state changes. In order to improve this point, SFC language can also be used, but the reality is that users do not easily accept it due to the gap in the description method with the ladder language. [0003] Patent Document 1 describes a method of describing a condition part of a sequence using a flowchart and describing a control function using a ladder language. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Application Laid-Open No. 11-265209 Contents of the invention [0007] The problem to be solved by the invention [0008] In Patent Document 1, the program is subdivided in units of steps. However, the indepe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/05
Inventor 山下善臣
Owner MITSUBISHI ELECTRIC CORP