回复:S7-200自由口通讯，结束字符如何处理？？-技术论坛-工业支持中心-西门子中国

回复:S7-200自由口通讯，结束字符如何处理？？

chengrui

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普通如何晋级?

发布于 2010-04-29 08:36:06

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你说的不整齐的地方是计算机的串口缓存区引起的，你用示波器看是没有这些间隔的，

quote:以下是引用持光踏影在2010-04-28 17:50:05的发言：
还有一个问题请教各位：PC上串口调试软件和PLC进行自由口通讯，以下截取的一段通讯报文：开始符是10，结束符是FF，为什么有时候一包数据会分两包发送呢，（感觉中间有歇息了一下），就是以下不整齐的地方：
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00
00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00
00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00
00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00
FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C E0 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF 10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00
00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00
00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00
00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00
00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00
00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00
00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 FF
10 00 0C 00 00 00 00 00 00 00 00 00 00 00 00
FF 10 00 0C 00 00 00 00 00 00 00 00 00 00
00 00 FF