Programmable logical controller, its expanded module and its hardware expanding method

A technology for expanding modules and programming logic. It is applied to sequence/logic controller program control, electrical program control, and comprehensive factory control. It can solve problems such as inconvenient installation, confusion, and poor generality of user programs, and achieve real-time support. The effect of convenience of sex and information processing

Inactive Publication Date: 2009-01-14
SOMER LEROY ELECTRO TECH FUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of manual addressing is that it is easy to cause inconvenient installation, even confusion, and poor versatility of user programs; automatic addressing of the main module will bring additional software and hardware overhead

Method used

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  • Programmable logical controller, its expanded module and its hardware expanding method
  • Programmable logical controller, its expanded module and its hardware expanding method
  • Programmable logical controller, its expanded module and its hardware expanding method

Examples

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Embodiment Construction

[0025] The present invention will be further elaborated below according to the drawings and specific embodiments.

[0026] Such as figure 2As shown, a programmable logic controller (PLC) of the present invention mainly includes a main module BU, an expansion bus and at least two expansion modules 1 (assuming that it includes L expansion modules, L≥2). Among them, the expansion module 1 is connected with the main module BU in a step-by-step connection mode through the expansion bus. This article defines the expansion module 1 connected to the main module BU as the first-level expansion module, the expansion module 1 connected to the first-level expansion module as the second-level expansion module, and so on. The main module BU is responsible for the transaction processing of the PLC and the execution of the user program. It selects a certain expansion module 1 through the addressing signal line 14 in the expansion bus, and then accesses the corresponding expansion module 1 t...

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Abstract

The invention releases to a kind of programming logic control, specially a kind of programming logic control, the expansion module and the hardware expansion method of it. The characteristic of the expansion module of programming logic control is that it comprises an address transfer unit which is used to extend the address signal of the bus based on some rules and than to continue passing on along the bus. At least one part of the address signal is put to the mainly control unit through the signal line. The invention also published a kind of programming logic control and the hardware expansion method of it. The invention can make the exemption address design between the conterminous main module and the expansion module come true. It also supports the directly interview from the main module to the expansion module. The main module can remove the addressing signal at any moment based on the need of itself and start up a new link or rebuild a link, which can effectively support the interview to the expansion module.

Description

technical field [0001] The invention relates to a programmable logic controller, in particular to a programmable logic controller, its extension module and its hardware extension method. Background technique [0002] Programmable logic controllers (PLCs) are widely used in various industries today, such as production equipment and process control in automobiles, chemicals, and textiles. It consists of an input port, a core control unit and an output port. Its main function is to read the electrical signal from the input port, then convert it into a digital signal and send it to the core control unit for processing according to the logic set by the user beforehand. The processing result is converted into an electrical signal and sent to its output port to drive the external device connected to it to complete the corresponding function, thus replacing the traditional relay control system. [0003] The full configuration of input and output ports (commonly known as points) of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCY02P90/02
Inventor 曲峰
Owner SOMER LEROY ELECTRO TECH FUZHOU CO LTD
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