Author(s) :

shruthi B N.

Volume/Issue :

Abstract :

The integration of Programmable Logic Controllers (PLCs) with Human-Machine Interfaces (HMIs) plays a pivotal role in enhancing automation systems across industrial domains. This paper explores the seamless communication between PLCs and HMIs, focusing on architecture, protocols, and application design considerations. A detailed overview is provided on how real-time process monitoring and control are achieved through efficient data exchange mechanisms such as Modbus, OPC UA, and Ethernet/IP. The study also highlights best practices for HMI design that ensure intuitive operator interaction, improved system diagnostics, and operational safety. A practical implementation using [mention specific PLC and HMI brands/models, e.g., Siemens S7-1200 and WinCC] demonstrates the integration methodology and validates system responsiveness, reliability, and user experience. The paper contributes to the body of knowledge by offering a scalable framework for PLC-HMI integration applicable to various industrial automation scenarios, thus enabling smarter and more adaptable manufacturing environments

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