Method for implementing data transmission between PLC of different brands

A data transmission and brand technology, applied in the direction of program control and electrical program control in sequence/logic controllers, can solve the problems of complex systems and difficult implementation, and achieve the effect of simple data transmission, simple implementation and saving production costs

Inactive Publication Date: 2009-03-25
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When there are PLC systems of the third brand, the fourth brand, or even more brands, it is necessary to add a communication module for each brand of PLC, which makes the system complicated and difficult to implement

Method used

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  • Method for implementing data transmission between PLC of different brands
  • Method for implementing data transmission between PLC of different brands
  • Method for implementing data transmission between PLC of different brands

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Embodiment Construction

[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] The method for realizing data transmission between PLCs of different brands described in the present invention establishes the communication connection between the man-machine interface and each PLC in the PLC system of each brand respectively. In the communication connection, for each PLC in the PLC system of each brand, the connection name between the PLC and the man-machine interface is defined respectively, and the connection name includes the network protocol supported by the PLC, the network address, data type and other information. By defining a source tag and a destination tag in the man-machine interface, the source tag points to the storage address where the read data is located in the PLC of the read data, and th...

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Abstract

The invention provides a method for realizing data transmission among different brands of PLC. The method comprises the steps: building communication connection between a man-machine interface and each PLC in various brands of PLC systems; in the man-machine interface, defining a source tag pointing to the read data and a destination tag pointing to read data respectively; and in the man-machine interface, a value of the source tag is given to a destination tag to realize the data transmission between PLC reading data and a PLC of which data is read. The method can conveniently realize the data transmission among different brands of PLC.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a method for realizing data transmission between PLCs of different brands. Background technique [0002] In a modern factory, in addition to the plant-level programmable logic controller (PLC: Programmable Logic Controller) system, there are many independent subsystems. For example, the PLC system of each production workshop, or the PLC system of different production processes in the same production workshop. For a large factory, due to the continuous transformation of the production line and the continuous updating of old and new processes, these PLC systems are often provided by different manufacturers, and many of these PLC systems need to communicate with each other. [0003] In practical applications, although the PLC systems provided by various manufacturers all support industrial Ethernet. However, the communication protocols supported by PLC systems produced by differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 刘雁飞高鹏双
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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