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Apparatus and method for controlling an input signal

A technology of input signal and control signal, applied in general control system, program control, program control in sequence/logic controller, etc., can solve problems such as unusable, long time, etc., and achieve the effect of improving performance

Active Publication Date: 2016-04-06
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the signal correction scheme using linear equations according to the prior art measures the analog input signal many times, this scheme takes a lot of time and cannot be adopted when the analog input signal is a nonlinear signal

Method used

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  • Apparatus and method for controlling an input signal
  • Apparatus and method for controlling an input signal
  • Apparatus and method for controlling an input signal

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Embodiment Construction

[0017] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily use the embodiments. However, the embodiments are not limited to those described below, and there are many modifications. Elements not related to the description of the embodiments may be omitted from the drawings for the purpose of brevity or clarity. The same elements will be assigned the same reference numerals throughout the figures.

[0018] In the following description, when it is mentioned that a part is connected to another part, these parts are not only directly connected to each other but also electrically connected to each other while interposing another part therebetween.

[0019] In the following description, when it is mentioned that a predetermined part "includes" a predetermined component, unless indicated otherwise, the predetermined part does not exclude other components but may further include other componen...

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Abstract

The invention discloses a device and a method for controlling an input signal. Apparatus and methods for controlling a signal such that a PLC input signal is equal to a reference input signal are disclosed. The apparatus includes: an error calculation unit that calculates an error by using the PLC input signal and the reference input signal; an estimated parameter calculation unit that calculates an error by using the reference input signal, the PLC input signal and the error to calculate an estimated parameter; and an error correction unit that corrects the error by using the estimated parameter so that the PLC input signal is equal to the reference input signal.

Description

technical field [0001] Embodiments relate to an apparatus and method for controlling an input signal capable of accurately measuring an input signal input to a PLC (Programmable Logic Controller). Background technique [0002] Automatic equipment used in the industrial field consists of mechanical devices including relays. There is difficulty in changing automatic equipment composed of mechanical equipment because the internal circuits of the automatic equipment must be changed. To overcome this difficulty, PLC is used. [0003] PLCs include analog input modules. An analog input module of a PLC may include circuitry for converting an analog input signal into a numerical value. The analog input signal may include an analog direct current or an analog direct voltage. [0004] In order to convert the analog input signal into a digital signal, the analog input module of the PLC can measure the value of the analog input signal after receiving the analog input signal. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/0423G05B19/054G05B15/02
Inventor 金桢煜
Owner LSIS CO LTD