点击图片查看原图
图2为"起保停控制"电气原理图，在该系统中，按钮SB0用于停车控制，因此使用其常闭触点串联于控制线路。SBl为起动按钮，使用其常开触点。若使用相同的设备（即停车SB0用常闭触点，起动SBl用常开触点），利用PLC进行该控制，则需编程梯形图程序 PLC与继电接触器控制的重要区别之一就是工作方式不同。继电接触器控制系统是按"并行"方式工作的，也就是说是按同时执行的方式工作的，只要形成电流通路，就可能有几个电器同时动作。而PLC是以"串行"方式工作的，PLC在循环执行程序时，是按照语句的书写顺序自上而下进行逻辑运算，而前面逻辑运算的结果会影响后面语句的逻辑运算结果。因此梯形图编程时，各语句的位置也会对控制功能产生关键影响
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电气控制系统：
造纸、印染生产线；泥浆泵、灰浆泵；高压风机、水泵；行车、焦化翻斗车；电梯；起重机等变频控制系统。拉丝机、造粒机、切断机、压缩机、磨床等变频控制系统。转炉倾动及氧枪升降、高炉给料、连铸、辊道、转窑、煅烧炉等高可靠变频控制系统。变电站综合自动化控制系统
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公司经销产品广泛应用于数控机械 冶金、石油天然气、石油化工、化工、造纸印刷、纺织印染、机械、电子制造、汽车制造、烟草、塑胶机械、电力、水利、水处理/环保、市政工程、锅炉供暖、能源、输配电等。
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