参见《如何同步操作面板与S7-200/300/400 控制器间的日期和时间》的例子：
https://support.automation.siemens.com/CN/llisapi.dll?func=cslib.csSearch&objaction=cssearch&lang=zh&siteid=cseus&query=&query2=%e5%a6%82%e4%bd%95%e5%90%8c%e6%ad%a5%e6%93%8d%e4%bd%9c%e9%9d%a2%e6%9d%bf%e4%b8%8eS7-200/300/400%20%e6%8e%a7%e5%88%b6%e5%99%a8%e9%97%b4%e7%9a%84%e6%97%a5%e6%9c%9f%e5%92%8c%e6%97%b6%e9%97%b4&content=adsearch%2Fadsearch%2Easpx
https://support.automation.siemens.com/CN/llisapi.dll/csfetch/24106357/TimeSyn_200_TP170A_KTP178.rar?func=cslib.csFetch&nodeid=24219597