S7-300 PLC系统时间的应用技巧

Application skills of system time in S7-300 PLC

针对西门子S7-300系列PLC CPU系统时间在使用方面具有一定的难度,尤其在与TP170A触摸屏连机时,存在系统时间参数读取不正常,系统时间无法设置,系统时间无法正确实时显示等诸多问题,本文以在触摸屏上实现设置和读取CPU系统时间为例,介绍了S7-300PLC系统时间的使用技巧及其高级应用。

Aim at the system time of Siemens S7-300 series PLC CPU, it is has some difficulty in using the system time, especially when the TP170A touch-screen machines links to PLC, Includes the system time parameters cannot read normally; the system time cannot be set; the system time cannot be displayed correctly, and so on. This paper introduces how to set and read the system time on the touch-screen, and some advanced application skills for S7-300 PLC as an example.