说明：  Profibus是作为德国国家标准DIN 19245和欧洲标准prEN 50170的现场总线。ISO/OSI模型也是它的参考模型。由Profibus -Dp、Profibus -FMS、Profibus-PA组成了Profibus系列
(Profibus is the field bus of German national standard DIN 19245 and European standard prEN 50170. The ISO/OSI model is also its reference model. Profibus series is composed of Profibus-Dp, Profibus-FMS and Profibus-PA.)