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Programmable logic controller and realization method

A technology of programming logic and implementation method, applied in the direction of program control and electrical program control in sequence/logic controllers, can solve problems such as difficulty in fault location and analysis of programmable logic controllers, and achieve easy fault analysis, fast and accurate The effect of targeting and analysis

Inactive Publication Date: 2013-07-31
SHENZHEN HUICHUAN CONTROL TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a programmable logic controller and its implementation method for the above-mentioned difficult problem of fault location and analysis of the programmable logic controller

Method used

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  • Programmable logic controller and realization method
  • Programmable logic controller and realization method
  • Programmable logic controller and realization method

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] Such as figure 1 , 2 Shown is a schematic diagram of the embodiment of the programmable logic controller of the present invention. The programmable logic controller in the present embodiment comprises main controller 10, hardware communication interface 40, dynamic memory 30, static memory 60, first memory 20, second memory 50, wherein hardware communication interface 40, dynamic memory 30, static The memory 60, the first memory 20, and the second memory 50 are connected to the main controller 10, respectively.

[0025] The above-mentioned main controller 10 can adopt ARM Cortex-A framewo...

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Abstract

The invention provides a programmable logic controller which comprises a first storage unit for storing a user program, a program execution unit for executing the user program in the first storage unit, an equipment monitoring unit for monitoring a state of connected equipment, a log maintenance unit and a second storage unit, wherein the log maintenance unit is used for creating a log file and writing execution state information of the program execution unit and state information of the equipment monitored by the equipment monitoring unit into the log file; and the second storage unit is used for storing the log file. The invention further provides a corresponding method. According to the controller and the method, the program execution state information and the state information of the equipment are recorded into the log file, so that the quick and accurate failure location and analysis are facilitated.

Description

technical field [0001] The invention relates to the field of programmable logic controllers, and more specifically, relates to a log system and an implementation method of a programmable logic controller. Background technique [0002] A programmable logic controller (PLC) is an electronic device that performs digital operations in an industrial environment. It is based on microprocessor technology and integrates computer technology, automation technology and communication technology. While the PLC is running, the host processor receives and stores user programs and data keyed in from the programmer; checks the status of power supplies, memory, I / O, and watchdog timers, and diagnoses syntax errors in the user program; and The main processor receives the status and data of each input device on site by scanning, and stores them in the I / O image area respectively, and then reads the user program one by one from the user program memory, and sends the operation result to the into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 罗德福
Owner SHENZHEN HUICHUAN CONTROL TECH
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