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1. Structure of intelligent building automation: BA, OA, CA, SA. 2. Technology used: modern computer technology, modern control technology, modern communication technology, modern graphic display technology 3, computer distributed control system (DCS) structure: Four-tier structure model 1 Direct control level 2 Process management level 3 Hierarchical management level 4 Property management level 4. Features of DCS: 1 Full-featured 2 Adopted network communication technology 3 Man-machine dialogue technology 4 System expansion Flexible 5 Reliability High 6 Strong management ability 7 Easy to use New features: Complete open system; Advanced computer technology; DCS is comprehensive and professional. 6, redundant technology: 1 redundant structure, 2 power redundancy, 3 motherboard redundancy, 4 analog input redundancy, 5 control output redundancy. 7, anti-jamming technology: 1 power system anti-jamming, 2 control loop anti-jamming, 3 anti-electromagnetic interference, 4 anti-signal transmission line interference, 5 grounding system anti-jamming and anti-static interference. 8, DCS operation main functions: process display and control, system generation and diagnosis, on-site data collection and recovery display. To implement these functions you must configure the device: 1 console 2 industrial control computer 3 peripheral storage device 4 graphic display device (CRT) 5 operator station keyboard 6 printout device. 9, dcs operation station operation display function: 1 screen expansion 2 function of the soft key 3 function key function 4 input area 5 station number operation 6 operation screen 7 trend recording function 8 alarm function 9 operation guide information function 10 flowchart function 10, DCS engineering design analysis steps: 1 according to the detection and control requirements, determine the DCS I / O type, quantity; 2 according to operational management requirements, determine the number of station and peripheral equipment station number and installation site; 3 to determine the DCS network composition, And the connection relationship with other computer or building equipment automation subsystem; 4 technical requirements for DCS software and hardware; 5 procurement of DCS (including inquiry, technical negotiation, business negotiation); 6DCS detailed design; 7DCS configuration and generation , commissioning and commissioning.