通过软件编程提高西门子S7-300PLC定时精度

Improve the accuracy of the Siemens S7-300 PLC timer by software programming

西门子S7-300PLC的定时器时基自动选择,在实际工程应用中,长定时和短定时器相临时,长定时器的定时精度就变差。本文提出采用化整为零的思想,通过软件编程的方法,避免定时器时基自动选择的缺陷,从而达到提高PLC定时精度的效果。给出了具体实现方法和实际效果。

the time base of Siemens S7-300 PLC timer is chosen automatically.In engineering application,when long timer neighbors short timer,the accuracy of long timer will be bad.This paper brings forward the idea of breaking the whole up into parts,by way of software programming to avoid choosing time base automatically,so that PLC timer accuracy is improved.Finally,implementation method and its practical effects are presented.