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Controlling apparatus of digital quantity output of PLC and controlling method thereof

A technology of digital output and control devices, which is applied in the direction of program control and electrical program control in sequence/logic controllers, can solve the problems of low reliability of digital output points, solve reliability problems, reduce losses, loss avoidance effect

Active Publication Date: 2012-03-14
深圳市合信自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of low reliability of digital output points in the prior art, an embodiment of the present invention proposes a PLC digital output control device, which includes a programmable logic controller PLC input and output control module and a switch control module, The PLC input and output control module is connected with the switch control module, wherein

Method used

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  • Controlling apparatus of digital quantity output of PLC and controlling method thereof
  • Controlling apparatus of digital quantity output of PLC and controlling method thereof
  • Controlling apparatus of digital quantity output of PLC and controlling method thereof

Examples

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no. 1 example

[0068] Such as Figure 6 The flow chart of the first embodiment of the PLC digital output control method of the present invention shown includes:

[0069] Step S601: the two drive switch tubes receive the control signal output by the PLC input and output control module, and output a digital quantity at the same output port according to the control signal;

[0070] Step S602: the feedback detection circuit detects the output information of the drive switch tube, and feeds back the detection information to the PLC input and output control module;

[0071] Specifically, the PLC digital output control device includes a PLC input and output control module and a switch control module. The switch control module includes two drive switch tubes, and each drive switch tube is correspondingly provided with a feedback detection circuit; the drive switch tube receives the PLC input and output control The control signal output by the module, and output the digital quantity at the same outp...

no. 2 example

[0074] Such as Figure 7 The second embodiment flowchart of the PLC digital quantity output control method of the present invention shown comprises:

[0075] Step S701: the two drive switch tubes receive the control signal output by the PLC input and output control module, and output a digital quantity at the same output port according to the control signal;

[0076] Step S702: the feedback detection circuit detects the output information of the drive switch tube, and feeds back the detection information to the PLC input and output control module;

[0077] Step S703: receiving the detection information fed back by the feedback detection circuit;

[0078] Step S704: According to the output control signal and the received detection information, judge whether the drive switch tube is opened or closed according to the control signal;

[0079] Specifically, the output control signal is a control signal for opening or closing the drive switch tube, and the received detection infor...

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Abstract

The embodiment of the invention discloses a controlling apparatus of digital quantity output of a programmable logic controller (PLC). The apparatus comprises a PLC input output control module and a switch control module. The PLC input output control module is connected with the switch control module. The switch control module includes two driving switch tubes and feedback detection circuits thatare corresponded to the driving switch tubes are arranged; and the driving switch tubes are used for receiving a control signal output by the PLC input output control module and outputting a digital quantity at a same output port according to the control signal. And the feedback detection circuits detect output information of the driving switch tubes that are corresponded to the feedback detection circuits and feedback detection information to the PLC input output control module; and besides, the PLC input output control module includes an output fault detection module, which is used for detecting whether there is a fault on the switch control module according to the output control signal and the feedbacked detection information; and when there is an fault, fault state alarming information is arranged. Correspondedly, the embodiment of the invention also discloses a controlling method of a PLC digital quantity output.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a PLC digital quantity output control device and a control method thereof. Background technique [0002] Programmable Logic Controller (PLC, Programmable Logic Controller) is an electronic device specially designed for digital operations in industrial environments. PLC has been widely used in the field of industrial automation. The digital quantities (switching quantities) controlled by PLC use more than a thousand points in a medium-scale system, of which the output points account for about half, and the reliability requirements for some of the digital outputs of these hundreds of points are very stringent. Because these output points often control important equipment parts, the reliability of digital output is related to the reliability of the entire automation application system. [0003] In the prior art, these digital output points are generally controlled by power s...

Claims

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Application Information

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IPC IPC(8): G05B19/05
Inventor 陈海峰戎思吉
Owner 深圳市合信自动化技术有限公司
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