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c# plc modibus 通信
c# 串口 以太网通信 modibus 连接 plc
从文本框输入负数 -2 补码=反+1=进位+原数
Vb 清除输入缓冲区 输出缓冲区 c#用不用清除??哪个函数??
//發送二進制數據 ??????????????
private void SendBytesData(SerialPort serialPort)
{ ////从 文本框取得数据 如果负数 -2 怎么办????
byte[] bytesSend = Encoding.Default.GetBytes(txtSend.Text);
spcom.Write(bytesSend, 0, bytesSend.Length);
}
通过MODBUS TCP读写PLC源码
功能模块一:读写PLC主模块
using System;
using System.Net;
using System.Net.Sockets;
public static void WriteWord(int mwAddress,int mwValue)
{写字到以太网
if (init_plc() == 0)
{
try
{
hi = mwAddress / 256;
low = mwAddress - hi * 256;
hi1 = mwValue / 256; ///////////16bit
low1 = mwValue - hi * 256;
sendBuf[7] = 6;
sendBuf[8] = (byte)hi;
sendBuf[9] = (byte)low;
sendBuf[10]
- 2022-07-10 15:42:30下载
- 积分:1
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本电子书是CDMA射频工程学的基本介绍,很好的书…
this ebook is for basic introduction to CDMA rf enfineering, very good book for basic level
- 2023-02-14 23:15:04下载
- 积分:1
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生成多项式的系数
Generator Polynomial Coefficients
- 2022-02-04 09:25:20下载
- 积分:1
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新exosip2
最新的exosip2-3.0.0源码,供对SIP协议栈有兴趣的同道研究-latest exosip2- 3.0.0 source for the SIP protocol stack are interested in research fellow
- 2022-01-25 20:32:25下载
- 积分:1
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基于WAP的手机无线应用的源代码,测试可用,供大家下载研究...
基于WAP的手机无线应用的源代码,测试可用,供大家下载研究-WAP-based mobile wireless applications, source code, testing is available for download U.S. study
- 2022-10-22 02:25:03下载
- 积分:1
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JTAPI by Sun's Java language on the application program interface. As JTAPI...
JTAPI是由Sun公司提出的基于Java语言的应用程序接口。由于JTAPI是基于Java的应用接口,使得JTAPI的对象独立于操作系统和硬件平台,支持跨平台的应用。JTAPI定义了一套类库,包含电话功能和扩充功能。JTAPI结合了传统的电话服务和Web处理能力,具有较强的功能。但是,基于Java的特性,使得JTAPI在拥有强大功能的同时,也失去了普及和推广的基础。-JTAPI by Sun"s Java language on the application program interface. As JTAPI is a Java-based application interface, JTAPI makes the object independent of operating systems and hardware platforms to support cross-platform applications. JTAPI definition of a set of class libraries, including telephone functions and expansion capabilities. JTAPI combination of traditional telephone services and Web processing capability, and a strong function. However, based on Java, which makes JTAPI the powerful functions, lost popularize and promote the foundation.
- 2022-05-19 10:21:52下载
- 积分:1
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著名的IEC60870-5-103的实现源代码
著名的IEC60870-5-103的实现源代码-famous IEC60870-5-103 to achieve the source code
- 2022-04-24 05:09:11下载
- 积分:1
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rfc1157 for used for developing mib in snmp
rfc1157 for used for developing mib in snmp
- 2022-12-18 13:30:03下载
- 积分:1
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单片机的232转485
这是一个232转485的实用电路图,大家可以 参考一下,如果有不对的地方可以提出来,我再做修改,欢迎大家前来查看,谢谢!
- 2022-08-04 08:21:33下载
- 积分:1
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《单片机通信技术与工程实践》书所附程序和例子
《单片机通信技术与工程实践》书所附程序和例子
- 2022-02-05 04:57:09下载
- 积分:1