包括了欧姆龙，西门子s7_200,s7_300等PLC控制伺服共5个程序，欧姆龙有同时控制两台伺服的程序；西门子有控制步进炉的程序，都是工厂用的程序，很有学习意义-Including Omron, Siemens s7_200, s7_300 such as PLC control servo of five programs, Omron has simultaneously control two servo program　Siemens furnace controlled stepper procedures are used to program the factory, is learning the meaning of