Modern PLC has functions such as mathematical operations(including matrix operations,function operations,and logical operations),data transmission,data conversion,sorting,table look-up and bit operations,and can complete data collection,analysis and processing.These data can be compared with the reference values stored in the memory to complete certain control operations;they can also be transmitted to other smart devices using the communication function,or they can be printed and tabulated.Data processing is generally used in large-scale control systems,such as unmanned flexible manufacturing systems;it can also be used in process control systems,such as some large-scale control systems in paper,metallurgy,and food industries.
现代PLC具有数学运算(含矩阵运算、函数运算、逻辑运算)、数据传送、数据转换、排序、查表及位操作等功能,可以完成数据的采集、分析及处理。这些数据可以与存储在存储器中的参考值比较,进而完成一定的控制操作;也可以利用通信功能传送到别的智能装置,或将它们打印制表。数据处理一般用于大型控制系统,如无人控制的柔性制造系统;也可用于过程控制系统,如造纸、冶金、食品工业中的一些大型控制系统。
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