<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[donglongbao的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/donglongbao</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; donglongbao]]></copyright><item><title><![CDATA[松下伺服A6调试参数干货]]></title><link>https://blog.youkuaiyun.com/donglongbao/article/details/132471607</link><guid>https://blog.youkuaiyun.com/donglongbao/article/details/132471607</guid><author>donglongbao</author><pubDate>Thu, 24 Aug 2023 12:18:27 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[Modbus_TCP  报文格式解析]]></title><link>https://blog.youkuaiyun.com/donglongbao/article/details/124851158</link><guid>https://blog.youkuaiyun.com/donglongbao/article/details/124851158</guid><author>donglongbao</author><pubDate>Wed, 18 May 2022 21:13:49 +0800</pubDate><description><![CDATA[Modbus_RTU
Modbus_ASCII
Modbus_TCP
报文格式基本都一致，掌握其中一个就全通了
请求：00 00 00 00 00 06 09 03 00 00 00 01
响应：00 00 00 00 00 05 09 03 02 12 34
一次modbus tcp读取保持寄存器的通信分析(省略了ip/tcp头)：从左向右分析该数据报文：
请求：
00 00为此次通信事务处理标识符，一般每次通信之后将被要求加1以区别不同的通信数据报文;
00 00表示协议标识符，00 00为modbus]]></description><category></category></item><item><title><![CDATA[SCADA系统常用VB\VC语言大全]]></title><link>https://blog.youkuaiyun.com/donglongbao/article/details/124485383</link><guid>https://blog.youkuaiyun.com/donglongbao/article/details/124485383</guid><author>donglongbao</author><pubDate>Thu, 28 Apr 2022 22:38:09 +0800</pubDate><description><![CDATA[可以用来作为非周期事件驱动
int New_Function_1()
{
int i;
tag=GetTagWord(“tag1”);
if(i&gt;10) {return 1;}
else{return 0;}
}
1、变量自加1（C)
int tag;
tag=GetTagByte(“tag1”);
tag=tag+1;
SetTagByte(“tag1”,tag);

2、变量自减1（C)
int tag;
tag=GetTagByte(“tag1”);
tag=tag-1;
SetTagByte(]]></description><category></category></item><item><title><![CDATA[MODBUS-RTU数据帧格式、报文解析]]></title><link>https://blog.youkuaiyun.com/donglongbao/article/details/122036632</link><guid>https://blog.youkuaiyun.com/donglongbao/article/details/122036632</guid><author>donglongbao</author><pubDate>Mon, 20 Dec 2021 10:54:57 +0800</pubDate><description><![CDATA[MODBUS-RTU 数据帧格式、报文解析；]]></description><category></category></item></channel></rss>