"基于S-PLC的厂用气管网压力控制系统设计(完整版)详解"

This paper introduces the design of a pressure control system for industrial gas pipe network based on S7-200PLC, elaborating on the application of variable speed integral PID control algorithm in the pipe network pressure control system. The hardware and software design methods of the system are also detailed, including the use of analog input module EM231 and analog output module EM232 for A/D conversion and D/A conversion, respectively. The hardware design is divided into main circuit and control circuit, while the software design involves variable speed integral PID control of the digital signal from the A/D conversion. This control method features slow accumulation of integral action when the deviation is large and accelerated accumulation when the deviation is small, ensuring the accuracy of the system. The keywords of the design include variable speed integral, pressure control system, S7-200PLC, and PID control. Overall, this paper provides a comprehensive overview of the design and implementation of a pressure control system for an industrial gas pipe network using S7-200PLC as the core. It outlines the theoretical and practical aspects of the system, including the use of advanced control algorithms and hardware components, and demonstrates the system's capabilities in maintaining precise pressure control. The design is versatile and can be modified to suit different industrial applications, making it a valuable resource for engineers and practitioners in the field of automation and control systems.