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本文介绍了在自由口通信模式下,用计算机读写S7-200 PLC存储区内相邻的多个字
节数据的通信程序设计方法,程序设计中采用了多种可靠性措施。 -In this paper, in a free port communication mode, using the computer to read and write S7-200 PLC storage area adjacent to a number of bytes of data communication program design methods, procedures designed to use a variety of reliability measures.