1、 基于 PLC 的室内空调温度控制设计 【摘要】【摘要】 本设计是将温度传感器采集到的室内温度转换为电阻的变化，再通过变送器将其转 化为模拟的输入电流或电压的变化,然后经过温度模块 FX0N-3A 把采集到的模拟量转换 成数字量送给 PLC 主模块，经过 CPU 的处理然后输出控制信号，控制两台压缩机和报警 灯。 当温度低于 25 度时，压缩机不工作，空调不启动；当温度高于 30 度时，启动一台 机组 Y0，空调开始制冷；当温度高于 36 时再启动一台 Y1，制冷效果加强，当温度减低 到 30 度时；停止 Y0，制冷下降，降到 26 度时两台都停止，空调此时相当于一台风扇， 没有制冷效果；当温
2、度低于 23 度时，Y2 会发出报警，并能利用上位机实现实时监控， 并且能够控制下位机。 【关键词】:温度传感器，PLC，压缩机 ABSTRACTABSTRACT This design is using temperature sensor PT - 100 acquisition indoor temperature conversion for resistance changes, another transmitter transform and then into module to the input current, voltage or change FX0N - after
3、 temperature module and the gathering to triple-a analog conversion into the digital quantity of PLC, after the main module for the processing and CPU output control signal, control two compressors and alarm lamp. When the temperature is below 25 degrees is compressor doesnt work namely air conditio
4、ning dont start, when temperature higher than 30 degrees to start a unit Y0, air conditioning refrigeration and when temperature higher than start when restarting a 36 Y1, refrigeration effect strengthening, when the temperature reduced to 30 degrees to stop Y0, refrigeration down, down to 26 degrees, air conditioning stop at two equivalent of a fan, no refrigeration effect, and when temperature is below when 23 degrees issued a warning, and may Y2 could use PC realize real-time monitoring,
