Direct digital control system (Direct Digital Control short), the computer collects real -time data through analog input channel (AI) and switch volume input channel (DI), then calculates in accordance with certain rules, finally sends out control signals, and uses analog quantity through the simulation quantity quantity Output channel (AO) and switching output channel (DO) directly control the production process. Therefore, the DDC system is a closed -loop control system and is the most common application method in the process of industrial production. Because the computer in the DDC system directly undertakes control tasks, it requires good real -time, high reliability, and strong adaptability. In order to give full play to the utilization of the computer, a computer usually controls several or even dozens of circuits, and it must be reasonably designing and applying software to complete all functions without losing time. DDC (Direct Digital Control) Direct digital control is an easy -to -operate control device with simple operation. Adjustment and the frequency conversion control of the cooling water tower heat dissipation fan can make the air -conditioning system operating more efficiently. In this way, it not only brings great economic benefits to property management, but also allows the system The service life of the equipment and the purpose of providing a comfortable air -conditioning environment and energy saving. This can achieve highly concentrated digital control. DDC adopts a variety of anti -interference measures such as full photoelectric isolation, power supply voltage monitoring, instantaneous pulse interference suppression, digital filtering, and door dogs. Mostly used for the temperature, humidity, pressure, and flow of electromechanical equipment such as central air conditioning, fresh air units, and so on. In the distribution control system, it is usually used as a field direct controller and contacts the central control station through the communication bus.
Direct digital control system (Direct Digital Control short), the computer collects real -time data through analog input channel (AI) and switch volume input channel (DI), then calculates in accordance with certain rules, finally sends out control signals, and uses analog quantity through the simulation quantity quantity Output channel (AO) and switching output channel (DO) directly control the production process. Therefore, the DDC system is a closed -loop control system and is the most common application method in the process of industrial production. Because the computer in the DDC system directly undertakes control tasks, it requires good real -time, high reliability, and strong adaptability. In order to give full play to the utilization of the computer, a computer usually controls several or even dozens of circuits, and it must be reasonably designing and applying software to complete all functions without losing time.
DDC (Direct Digital Control) Direct digital control is an easy -to -operate control device with simple operation. Adjustment and the frequency conversion control of the cooling water tower heat dissipation fan can make the air -conditioning system operating more efficiently. In this way, it not only brings great economic benefits to property management, but also allows the system The service life of the equipment and the purpose of providing a comfortable air -conditioning environment and energy saving.
This can achieve highly concentrated digital control. DDC adopts a variety of anti -interference measures such as full photoelectric isolation, power supply voltage monitoring, instantaneous pulse interference suppression, digital filtering, and door dogs. Mostly used for the temperature, humidity, pressure, and flow of electromechanical equipment such as central air conditioning, fresh air units, and so on. In the distribution control system, it is usually used as a field direct controller and contacts the central control station through the communication bus.