PLC应用英文资料外文翻译--PLC在冰蓄冷中央空调系统控制中的应用-PLC设计.doc

PLC in the Ice Storage Central Air-conditioning System of Control 1 Introduction Ice storage air-conditioning is the Central Valley will be redundant power grid electricity at night to form ice cold storage, electricity consumption peak during the day when the ice will melt to provide air-conditioning services. As in most parts of Chinas electricity at night is much lower than during the day, using ice cold storage central air conditioning can significantly reduce the users operating costs. ? Ice storage central air-conditioning system configuration of equipment than conventional air-conditioning system to increase the number and require a higher degree of automation, but it automatically to meet the requirements of the air-conditioned buildings throughout the day under the conditions of the day will be with all the energy spent, the largest At least to save operating costs. 2 Control system. Control system from the next crew (the scene control workstations) and PC (central management workstations), with the crew using programmable logic controller (PLC) and touch screen, PC using industrial-grade computers and printers, system configuration necessary if the annex Communications equipment interface cards, modems, etc., to achieve the parameters of the storage system and automatic intelligent run. ?????? The crew at the scene and touch-screen system can control parameter settings and data. PC remote management and printing, which includes the crew and all the features touch screen. Following the system as a whole crew of the industrial PLC as the core, the automated control. Control equipment and devices include: detection sensor components, electrical valves, converter, and so on. 2.1 Under the machine system (Regional workstations) 2.1.1 TP21 touch-screen ?????? TP27 used as a color touch-screen operation panel, completely replace the conventional switch button, light, and other devices to control more interviews counters clean. And, TP27 touch screen can b