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Design of high-precision PLC analog front-end based on ADuC7061

Bingwen Wang

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Abstract

For industrial PLC analog signal acquisition and output,thisarticle presents a precision analog front-end design based on ADuC7061.The system supports dual-channel PLC analog signal input and provides a channel for standard PLC current output.The system reaches a voltage measurement accuracy of 0.1% andthe current output accuracy of 0.2%.The systemuses ADuC7061 as the core of measurement and control.With different external analog conditioning circuit,the system can both measure theinput analog signalandoutput PLC standard current signal.By using SPI interface,the system can transport data and command.The software of this systemis able to acquire flexible automatic temperature calibration.This highprecisionsystem has flexible software interface,which can be used as PLC analog front-end,and the system can be widely used in the industrial field.

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What this paper is about

For industrial PLC analog signal acquisition and output,thisarticle presents a precision analog front-end design based on ADuC7061.The system supports dual-channel PLC analog signal input and provides a channel for standard PLC current output.The system reaches a voltage measurement accuracy of 0.1% andthe current output accuracy of 0.2%.The systemuses ADuC7061 as the core of measurement and control.With different external analog conditioning circuit,the system can both measure theinput analog signalandoutput PLC standard current signal.By using SPI interface,the system can transport data and command.The software of this systemis able to acquire flexible automatic temperature calibration.This highprecisionsystem has flexible software interface,which can be used as PLC analog front-end,and the system can be widely used in the industrial field.

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Available abstract

For industrial PLC analog signal acquisition and output,thisarticle presents a precision analog front-end design based on ADuC7061.The system supports dual-channel PLC analog signal input and provides a channel for standard PLC current output.The system reaches a voltage measurement accuracy of 0.1% andthe current output accuracy of 0.2%.The systemuses ADuC7061 as the core of measurement and control.With different external analog conditioning circuit,the system can both measure theinput analog signalandoutput PLC standard current signal.By using SPI interface,the system can transport data and command.The software of this systemis able to acquire flexible automatic temperature calibration.This highprecisionsystem has flexible software interface,which can be used as PLC analog front-end,and the system can be widely used in the industrial field.

Key concepts: Analog front-end, Analog signal, Interface (matter), Analog signal processing, SIGNAL (programming language), Analog device, Signal conditioning, Calibration

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