换热站控制系统组成解析

Core Insights - The heat exchange station control system is composed of PLC controllers, touch screens, electric control valves, frequency converters, and pressure, temperature, and flow transmitters, along with serial communication conversion modules and GPRS modules, working together to ensure stable and efficient heating [2][3] Group 1 - The control system utilizes transmitters to collect on-site data and transmit it to the PLC, which receives commands from the upper computer, compares set values with feedback values, and generates control signals [2][3] - These control signals are converted into analog signals via front-end I/O modules, allowing for precise regulation of electric control valves, frequency converters, and water replenishment pumps, achieving automated adjustment and stable operation [2][3] Group 2 - The system monitors the pressure difference of secondary supply and return water, automatically adjusting the frequency of the frequency converter to control the speed of the circulation pump [2][3] - It also starts and stops the water replenishment pump based on secondary return water pressure signals, with real-time transmission of operational data to the touch screen for display and monitoring [2][3]