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Power failure controlling device for programmable logic controller (PLC)

A technology of electric control and power-off detection module, which is applied in the direction of response error generation, redundant data error detection in operation, etc., and can solve problems that affect the performance of programmable controllers and cannot be processed in time

Inactive Publication Date: 2014-04-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of sudden power failure or unstable voltage, the current programmable controller will not be able to deal with it in time, and these consequences will sometimes directly affect the performance of the programmable controller

Method used

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  • Power failure controlling device for programmable logic controller (PLC)
  • Power failure controlling device for programmable logic controller (PLC)
  • Power failure controlling device for programmable logic controller (PLC)

Examples

Experimental program
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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Such as figure 1 As shown, the PLC power-down control device of the present invention includes an MCU, and the MCU includes input and output interfaces, other interfaces, expansion interfaces, and special function modules; wherein, the input and output interfaces include 16 inputs, 16 outputs, and 2 A / D, other interfaces include running / programming switch, power-off / power-on external interrupt and working status LED indicators, the extension part includes expansion module interface, human-computer interaction interface and external memory, and special function modules include USB-HOST, USB -DEVICE, RS-232 and JTAG.

[0015] Described MCU adopts the STM32F103VET6 chip based on the ARM Cortex-M3 processor core of ultra-low power consumption, the main frequency of up to 72MHz, has higher operating speed; The on-chip Flash of 512KB and the SRAM on-chip of 64KB can...

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Abstract

The invention discloses a power failure controlling g device for a programmable logic controller (PLC). The power failure controlling device comprises a microprogrammed control unit (MCU), a PLC, a power failure detection module, a permanent memory storage and a power module, when power failure of the PLC occurs, the power failure detection module transmits a power failure signal to the MCU, the data of the PLC, which are required to be stored, are stored by the MCU in the permanent memory storage, when the power failure detection module again detects that the supply voltage of the PLC reaches a certain threshold value, the power failure detection module transmits a power recover signal to the MCU, and thereby, the MCU is awakened and enabled to recover stored data. By means of the power failure controlling device for the PLC, when the power failure or instable voltage of the PLC occurs, the data of the PLC, which are required to be stored, can be stored, and when the voltage recovers, the stored data can be read so as to continue to work.

Description

technical field [0001] The invention relates to a PLC power-down control device. Background technique [0002] Programmable controller, as a computer controller specially designed for working in industrial environment, should have high reliability and strong anti-interference ability, and can make some sudden impacts on complex and changeable industrial sites. timely response. Therefore, this requires the core control unit of the programmable controller to have a faster computing speed and a stronger real-time processing capability. However, the current programmable controller may not be able to deal with it in time when there is a sudden power failure or the voltage is not stable enough. These consequences sometimes directly affect the performance of the programmable controller. Contents of the invention [0003] Purpose of the invention: the purpose of the present invention is to provide a kind of control device for PLC power-down at the deficiencies in the prior art, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 戴敏童炜山张志胜卓文涛
Owner SOUTHEAST UNIV