【正文】 s energy use, environmental, traffic and safety monitoring, control, etc., to provide a safe and reliable, but also save energy, and fortable work or living environmentbuilding automation system ponents and basic functions of building automation systems often include air conditioning, water supply and drainage, power supply, lighting, elevators, fire safety and prevention and other subsystems. According to our industry standards, BAS can be divided into equipment operation management and monitoring subsystem and fire prevention and safety subsystems, as shown. In general, these two subsystems together into BAS consider should, if the fire and safety precautions Ziji Tong independent setting, control center should be established munication with the BAS contact Yipian disaster Fasheng, can achieve the agreed operating Quan Zhuan Yi An Zhao, Jin Xing Yi Tihua coordination and contro.Building automation system39。 for new capabilities for remote diagnostics, maintenance, and configuration?；诰W(wǎng)絡(luò)信息的自動化控制英文畢業(yè)論文Control Based on Network and InformationA Automation Networking Application AreasNetworking is used in all areas of automation. In factory automation, process automation and building automation networks perform diverse tasks. Likewise, there are distinct differences between tasks performed for applications in different industry sectors that all have unique characteristics and consequently varying requirements. The way devices are connected, configured, and exchange data also differ.There is no onesizefitsall for industrial networks。 and for the quick response necessary for factory automation task. Ethernet was chosen for these applications because its high speed enables it to carry all this information. Moreover, Ethernet is already a standard and consequently is well understood and widely used. A large variety of equipment and solutions for Ethernet is available. In many applications, one of the key requirements for the host level protocol is availability. The network must be fault tolerantup and running even in the presence of a fault. This is extremely critical at the host level since the entire site is operated and supervised over this network. Downtime can be very disruptive and cause heavy losses。s basic functions can be summarized as follows: (1) automatic monitoring and control of various electrical and mechanical equipment, the stop, display or print the current operating state. (2) automatic detection, display, print a variety of electrical and mechanical equipment operating parameters and changes in trends or historical data. (3) According to external conditions, environmental factors, the change automatically adjust the load of equipment, so that is always running in top condition. (4) monitoring and timely processing of all accident emergencies (5) to achieve a variety of electrical and mechanical equipment on building a unified management, coordination and control. (6) Energy management: water, electricity, gas metering and charging, etc., to achieve energy management automation. (7) Equipment Management: including device files, equipment operation and equipment maintenance management reports. The principle of building automation control systemBuilding control system used is based on modern control theory, distributed puter control system, also known as distributed control system (Distributedcontrol systems referred to as DCS). It is characterized by a centralized management decentralized control, that is charged with distribution of equipment in the field office of the microputer control (DDC) to plete device charged with the task of realtime detection and control, centralized control of puter to overe the risks of high lack of centralized control and conventional single instrument in the central control room of the central management puter with CRT display, print output, extensive software management and a strong digital munications capabilities to plete the centralized operation, display, alarm, tasks such as printing and optimal control, avoiding Changgui instrument control is distributed difficulties after the manmachine contact, no unified management shortings, ensure that equipment running in top form.Here are distributed control systems with several concepts. direct digital control system (DDC) direct digital control system (Direct Digital Control referred to as DDC) shown in Figure 2. Computer through the analog input channels (AI) and digital input channels (DI) realtime data collection, and then calculated according to certain rules, and finally the control signals, and through the analog output channels (AO) and the switch output channel (DO ) direct control of the production process. So DDC system is a closed loop control system, a puter in the industrial production of the most popular way of an applicationDDC system control puter to undertake tasks, which required realtime, high reliability and adaptability. Composition of direct digital control systemDirect digital control system consists of the process input channel, process control puter, the process of output channels of three parts. Process input channels from the analog input and digital input of two parts. Analog input channels from the transmitter, the sampling switch, amplifier, A / D converter and interface circuit. One is the role of the transmitter signal will be converted into the standard nonpower electrical signal，Can be temperature, pressure, flow transformed into 010mA or 420mA DC signal, it is through the A / D converter to achieve. Digital input channels from the switch contacts, photoelectric coupler and interface circuit, reflecting the production process on / off state of the contact signal, through the optocoupler and the interface circuit transformation into a digital signal sent to the puterDirect mitment to the process control puter operations and control tasks, first of all input channels through the process of collecting the parameters o