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¹Ø¼ü´Ê:ÖÐÑë¿Õµ÷;PLC;WinCC flexible;

Abstract
Central air conditioning applications, more and more shopping malls, office buildings, factories and so on, the past control system in the process of adjusting temperature parameters requires lots of energy, so have been phased out.At this stage for central air conditioning, the customer is more and more attention to comfort and low energy consumption characteristics of the equipment.In this paper, we focus on the general control of the central air conditioning system, in order to further improve the above features datum.
This paper mainly studies the central air conditioning control system composition and working mechanism of different types and their corresponding;Expounds the character of the device of control system, structure and types;Design of central air-conditioning control requirements in hotels, for example, completed the overall flow diagram and PLC ladder graphics, in view of the equipment of PLC control system, comprehensive planning, and also involves the equipment debugging and maintenance work;Then use WinCC flexible structure monitoring system of central air conditioning is realized.Through debugging and practical application of monitoring system, the PC can effectively realize the mutual control with PLC, very comprehensive monitoring system function design, superior performance. [À´Ô´£ºhttp://www.doc163.com]
The system adopt Siemens production model for S7-300 PLC as main control module, PID control strategy based on before, through the PLC to control the degree of open the water valve, to ensure that the system can adjust flow according to the specific load, the method not only ensures a constant room temperature, and can also save many resources.Then by Siemens's PC to complete the man-machine interactive page design, interactive page contains system flow chart, installation work stop control, running state monitoring, trend curve, warnings, and many other related functions.Finally use WinCC configuration platform to realize the system configuration of the building.
Key words: Central air conditioning;PLC;WinCC flexible
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ABSTRACT    ¢ó
1 Ð÷ÂÛ    1
1.1 ÖÐÑë¿Õµ÷ϵͳ¼ò½é    1
1.2 ÖÐÑë¿Õµ÷¹¹³É¼°¹¤×÷Ô­Àí    1
1.3ÖÐÑë¿Õµ÷ÊäËͲ¿·ÖÉ豸    1
1.4±¾¿ÎÌâÒâÒå¼°Ö÷ÒªÄÚÈÝ    1
2 ÖÐÑë¿Õµ÷µÄ¿ØÖƼ¼Êõ    2
2.1ÖÐÑë¿Õµ÷¿ØÖÆÏµÍ³¼ò½é¼°Ìص㠠  2
2.2ÖÐÑë¿Õµ÷¿ØÖÆÏµÍ³µÄ½á¹¹    2
2.3ÖÐÑë¿Õµ÷µÄ¿ØÖƼ¼Êõ    4
2.4ÖÐÑë¿Õµ÷ϵͳÖÐ¼à¿ØÏµÍ³    4
3 ÖÐÑë¿Õµ÷¼à¿ØÏµÍ³µÄPLCÉè¼Æ    5
3.1¿É±à³ÌÐò¿ØÖÆÆ÷PLC¸ÅÊö    5
3.2 PLCµÄ·ÖÀà    5
3.3 PLCµÄÌØµã    5
3.4 PLCµÄ»ù±¾×é³É    5
3.5 SIMATIC MANAGERµÄÓ¦ÓýéÉÜ    7
3.6ÖÐÑë¿Õµ÷ϵͳµÄPLCÉè¼Æ    8
3.7ÖÐÑë¿Õµ÷ϵͳµÄ³ÌÐòÉè¼Æ    9
4 ÖÐÑë¿Õµ÷ϵͳµÄ¼à¿ØÉè¼Æ    18
4.1 WINCC FLEXIBLE¼ò½é    18
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4.2 ÈË»ú½çÃæÉè¼Æ    18
4.3ÖÐÑë¿Õµ÷¿ØÖÆÏµÍ³µÄ¼àÊÓÓë¿ØÖÆ    21
½á    ÂÛ    24
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