PC与S7-200 PLC自由通信协议的研究

Resarch on Free Communication Agreement Based on PC & S7-200 PLC

本文介绍了S7-200系列PLC利用自由口通信的方式及相关特殊标志位的设定,并简单介绍了通过SIEMENSSTEP7软件进行自由口通信协议编程的方法,实现了PC与PLC之间的通信。

This paper introduces the style of S7-200 series,PLC utilitying free space communication and setup of place of relevant specialmark.And it simply introduces how realize the communication between PC and PLC,programming of communication agreement of free space throngh SIEMENS STEP 7.