西门子PLC模块6

  可编程控制装置是由现代化生产的需求而产生的，可编程序控制装置的分

  西门子PLCS7-200系列西门子PLCS7-200系列

  类也必然要达到现代化生产的需求。

  一般来讲可以从三个角度对可编程序控制装置进行分类。其一是从可编程序控制装置的控制规模大小去分类，其二是从可编程序控制装置的性能高低去分类，其三是从可编程序控制装置的结构特点去分类。

  控制规模

  一般分为大型机、中型机和小型机。

  西门子PLCS7-300系列西门子PLCS7-300系列

  小型机: 小型机的控制点一般在256点之内,适合于单机控制或小型系统的控制。

  西门子小型机有S7-200：处理速度0.8~1.2ms ；存贮器2k ；数字量248点；模拟量35路 。

  中型机:中型机的控制点一般不大于2048点,适用于对设备进行直接控制，也能对多个下一级的可编程序控制装置进行监控，它适合中型或大型操作系统的控制。
 西门子中型机有S7-300：处理速度0.8~1.2ms ；存贮器2k ；数字量1024点；模拟量128路 ；网络PROFIBUS；工业以太网；MPI。

  大型机：大型机的控制点一般大于2048点,不单能完成比较复杂的算术运

  西门子PLCS7-400系列西门子PLCS7-400系列

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