After the introduction of the selected elements , the thesis gives out a design which includes a front control center based on siemens s7300 plc 、 a line connection of the master profibus and the distributed intelligent i / o et200m system 、 a real - time display system of pressure sensors and a gas supply system with stop valve and electric actuator 本文在介绍了所选择器件情况基础上，设计了基于siemenss7300plc为前端控制中心，利用profibus总线接分布式智能i / o et200m系统，压力传感器现场显示，截止阀加电动执行器实现配气的方案。
