Abstract
Along with society progress and economy of high speed development, central air condition of application also more and more extensive, for establish efficiently, economy energy, comfort, safety of work and the living environment lay foundation.The central air condition existence of tradition much weakness, so the central air condition air condition emerge with the tide of the times under this kind of situation.
This text say a central air condition to change Pin to adjust soon system main is spread a feeling machine by the Siemens PLC, temperature and change Pin machine, electrical engineering and other low pressure protection and control electric appliances component constitute.The whole system adoption mold piece turn design, CPU lord mold piece adoption CPU226, imitate the quantity expand a mold piece adoption EM231,According to PLC importation output quantity of how much, decision the point need by PLC, then selection correspond of the PLC of size. Temperature examination part design;The choice change Pin machine;Design lord electric circuit;Carry on collect towards making a cold equipments information, manifestation, make cold piping temperature to spread a feeling machine among them to make cold piping temperature to carry on a data to collect and to system equipments concentration control, more keep the manifestation of view the spot the system is in the movement of various work condition data, exaltation the credibility of the system.
To the system carry on auto control, should control system adoption forerunner of measure and control, changing Pin, industry automation, with communication network technique, equipments of each with protection the function be well-found, safety coefficient consumedly exaltation.Pass software design completion the parameter need by central air condition constitution and control request, system software from lord procedure, start to turn procedure, imitate quantity examination the procedure constitute, the data which pass to adjust to use sub- procedure completion system collect, imitate quantity examination harmony light report to the police etc. function.
