CAJ | 학술논문

为了克服传统控制系统对模拟量信号采集的干扰，利用基于Modbus协议实现PLC与变频器和上位机之间的通信。结合中央空调系统组成、运行原理和特点，分析了冷冻水系统和冷却水系统变频控制，并分析了变频节能的原理。此外，系统还引入了组态，对整个控制系统进行远程监控与管理，具有良好的人机界面。
위료극복전통공제계통대모의량신호채집적간우，이용기우Modbus협의실현PLC여변빈기화상위궤지간적통신。결합중앙공조계통조성、운행원리화특점，분석료냉동수계통화냉각수계통변빈공제，병분석료변빈절능적원리。차외，계통환인입료조태，대정개공제계통진행원정감공여관리，구유량호적인궤계면。
Based on Modbus , the communication among PLC and frequency converter and host computer were realized to overcome conventional control system ’ s disturbance in the analog signal acquisition .Through hav-ing central air-conditioning system ’ s composition , working principle and features considered , the variable fre-quency control of chilled water system and cooling water system were discussed , including the principle of fre-quency conversion and the energy-saving;in addition , the system employs the configuration control to realize remote control and it has good man-machine interface .