基本信息
源码名称:Modbus协议与各类PLC通过socket通讯
源码大小:0.11M
文件格式:.rar
开发语言:C#
更新时间:2018-12-06
友情提示:(无需注册或充值,赞助后即可获取资源下载链接)
嘿,亲!知识可是无价之宝呢,但咱这精心整理的资料也耗费了不少心血呀。小小地破费一下,绝对物超所值哦!如有下载和支付问题,请联系我们QQ(微信同号):813200300
本次赞助数额为: 5 元×
微信扫码支付:5 元
×
请留下您的邮箱,我们将在2小时内将文件发到您的邮箱
源码介绍
实例封装了modbus标准协议,通过socket可以与目前工控主流PLC直接通讯
与PLC通讯专用
using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Windows.Forms;
namespace CSharpModBusExample
{
public enum FunctionCode : byte
{
/// <summary>
/// Read Multiple Registers
/// </summary>
Read = 3,
/// <summary>
/// Write Multiple Registers
/// </summary>
Write = 16
}
internal class ModBusTCPIPWrapper : ModBusWrapper, IDisposable
{
private static short StartingAddress = short.Parse(ConfigurationManager.AppSettings["StartingAddress"]);
public static ModBusTCPIPWrapper Instance = new ModBusTCPIPWrapper();
private SocketWrapper socketWrapper = new SocketWrapper();
bool connected = false;
public override void Connect()
{
if (!connected)
{
this.socketWrapper.Logger = this.Logger;
this.socketWrapper.Connect();
this.connected = true;
}
}
public override byte[] Receive()
{
this.Connect();
List<byte> sendData = new List<byte>(255);
//[1].Send
sendData.AddRange(ValueHelper.Instance.GetBytes(this.NextDataIndex()));//1~2.(Transaction Identifier)
sendData.AddRange(new Byte[] { 0, 0 });//3~4:Protocol Identifier,0 = MODBUS protocol
sendData.AddRange(ValueHelper.Instance.GetBytes((short)6));//5~6:后续的Byte数量(针对读请求,后续为6个byte)
sendData.Add(0);//7:Unit Identifier:This field is used for intra-system routing purpose.
sendData.Add((byte)FunctionCode.Read);//8.Function Code : 3 (Read Multiple Register)
sendData.AddRange(ValueHelper.Instance.GetBytes(StartingAddress));//9~10.起始地址
sendData.AddRange(ValueHelper.Instance.GetBytes((short)30));//11~12.需要读取的寄存器数量
this.socketWrapper.Write(sendData.ToArray()); //发送读请求
//[2].防止连续读写引起前台UI线程阻塞
Application.DoEvents();
//[3].读取Response Header : 完后会返回8个byte的Response Header
byte[] receiveData = this.socketWrapper.Read(256);//缓冲区中的数据总量不超过256byte,一次读256byte,防止残余数据影响下次读取
short identifier = (short)((((short)receiveData[0]) << 8) receiveData[1]);
//[4].读取返回数据:根据ResponseHeader,读取后续的数据
if (identifier != this.CurrentDataIndex) //请求的数据标识与返回的标识不一致,则丢掉数据包
{
return new Byte[0];
}
byte length = receiveData[8];//最后一个字节,记录寄存器中数据的Byte数
byte[] result = new byte[length];
Array.Copy(receiveData, 9, result, 0, length);
return result;
}
public override void Send(byte[] data)
{
//[0]:填充0,清掉剩余的寄存器
if (data.Length < 60)
{
var input = data;
data = new Byte[60];
Array.Copy(input, data, input.Length);
}
this.Connect();
List<byte> values = new List<byte>(255);
//[1].Write Header:MODBUS Application Protocol header
values.AddRange(ValueHelper.Instance.GetBytes(this.NextDataIndex()));//1~2.(Transaction Identifier)
values.AddRange(new Byte[] { 0, 0 });//3~4:Protocol Identifier,0 = MODBUS protocol
values.AddRange(ValueHelper.Instance.GetBytes((byte)(data.Length 7)));//5~6:后续的Byte数量
values.Add(0);//7:Unit Identifier:This field is used for intra-system routing purpose.
values.Add((byte)FunctionCode.Write);//8.Function Code : 16 (Write Multiple Register)
values.AddRange(ValueHelper.Instance.GetBytes(StartingAddress));//9~10.起始地址
values.AddRange(ValueHelper.Instance.GetBytes((short)(data.Length / 2)));//11~12.寄存器数量
values.Add((byte)data.Length);//13.数据的Byte数量
//[2].增加数据
values.AddRange(data);//14~End:需要发送的数据
//[3].写数据
this.socketWrapper.Write(values.ToArray());
//[4].防止连续读写引起前台UI线程阻塞
Application.DoEvents();
//[5].读取Response: 写完后会返回12个byte的结果
byte[] responseHeader = this.socketWrapper.Read(12);
}
#region IDisposable 成员
public override void Dispose()
{
socketWrapper.Dispose();
}
#endregion
}
}