The 140AVI03000 is an analog input module of the Modicon Quantum series manufactured by Schneider Electric3. It is designed to interface between the PLC and analog devices such as temperature sensors, pressure transducers, and flow meters, facilitating the acquisition and processing of analog signals in industrial control systems2. This module features a standard format, ensuring easy integration and compatibility with existing systems2. It ，including a hot – standby system with Unity Pro, which reserves memory space for applications3. The front panel is equipped with an LCD screen and navigation buttons, and it also includes system registers. The Unity Pro programming settings provide standard function blocks, allowing users to read/write command registers and read status registers3.