摘要
本文主要研究现行国际标准中可与PLC兼容的4种现场总线(WorldFIP、ProfiBUS、ControI NET、InterBUS),分析它们的适用范围。为现场总线的选择提供理论依据和基本的选用原则。并结合工业现场,探讨现场总线在具体工业环境中的选择。
The virtue and shortcoming on four kinds of media access control methods （worldFIP, ProfiBUS, ControINET, InterBUS） are summarized. Three types of messages （Explicit messages, implicit messages and maintained messages） in industry net-work and their relevant characteristics are pointed out. considered some practical problems when chose the fieldbus at the industry site.
