PLC HMI

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A human machine interface (HMI) connected to a separate programmable logic controller (PLC) is the standard system for machine automation. However, combining PLC processing and HMI monitoring and control into a single hardware platform is becoming a more available and popular option due to improvements and advancements in both hardware and software. This article compares the combined HMI+PLC unit with the separate HMI & PLC system and highlights where each excels.

For decades, the separate HMI & PLC system has set the standard for industrial automation. It has only improved with time and remains an excellent choice for many applications. But in the past few years the combined HMI+PLC unit with its all-in-one touch screen interface and logic controller, has become available.