DS200DENQF1
DS200DENQF1
DS200DENQF1
初研制生产的 PLC主要用于代替传统的由继电器接触器构成的控制装置,但这两者的运行方式是不相同的:
(1)继电器控制装置采用硬逻辑并行运行的方式,即如果这个继电器的线圈通电或断电,该继电器所有的触点(包括其常开或常闭触点)在继电器控制线路的哪个位置上都会立即同时动作。
(2)PLC的CPU则采用顺序逻辑扫描用户程序的运行方式,即如果一个输出线圈或逻辑线圈被接通或断开,该线圈的所有触点(包括其常开或常闭触点)不会立即动作,必须等扫描到该触点时才会动作。
为了消除二者之间由于运行方式不同而造成的差异,考虑到继电器控制装置各类触点的动作时间一般在100ms以上,而PLC扫描用户程序的时间一般均小于100ms,因此,PLC采用了一种不同于一般微型计算机的运行方式---扫描技术。这样在对于I/O响应要求不高的场合,PLC与继电器控制装置的处理结果上就没有什么区别了。
◆ 企业名称:厦门泰尼电气有限公司
◆ 主营业务:DCS,PLC
◆ 经营模式: 贸易
◆ 贸易地区:
◆ 联系人: 小黄《女士》
◆ 电话:
◆手机:
◆ QQ:2917675397
◆ 传真: (备注“01006”收)
◆ E-mail: 2917675397@qq.com
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