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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Net.Sockets;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using System.Web.Configuration;
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namespace Rs.Framework
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{
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public class ModbusTcp
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{
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Socket m_socket;
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string m_ip;
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int m_port;
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bool isConnected = false;
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int timeout = 2000;
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Stopwatch stopWatch = new Stopwatch();
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public ModbusTcp(string ip, int port)
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{
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m_ip = ip;
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m_port = port;
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m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
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}
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public string GetIp()
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{
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return m_ip;
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}
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public bool Connect()
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{
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try
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{
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IPEndPoint ipaddr = new IPEndPoint(IPAddress.Parse(m_ip), m_port);
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m_socket.Connect(ipaddr);
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isConnected = true;
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return true;
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}
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catch (Exception)
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{
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return false;
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}
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}
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/// <summary>
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/// 获取读取报文
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/// </summary>
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/// <param name="deviceID"></param>
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/// <param name="funCode"></param>
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/// <param name="startAddr"></param>
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/// <param name="readLen"></param>
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/// <returns></returns>
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public byte[] GetReadCommand(int deviceID, FunCode funCode, int startAddr, int readLen)
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{
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List<byte> readData = new List<byte>();
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//添加通信标识
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readData.Add(0x00);
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readData.Add(0x00);
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//添加协议标识
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readData.Add(0x00);
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readData.Add(0x00);
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//报文长度（读取报文的长度是固定的6个字节）
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readData.Add(0x00);
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readData.Add(0x06);
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//添加设备编号
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readData.Add((byte)deviceID);
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//添加功能码
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readData.Add((byte)funCode);
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//添加读取地址
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readData.Add((byte)(startAddr >> 8));
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readData.Add((byte)startAddr);
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//添加读取长度
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readData.Add((byte)(readLen >> 8));
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readData.Add((byte)readLen);
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return readData.ToArray();
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}
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private byte[] GetWriteCommand(int deviceID, FunCode funCode, int startAddr, byte[] writeData, int datalen = 0)
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{
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List<byte> readData = new List<byte>();
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//添加通信标识
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readData.Add(0x00);
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readData.Add(0x00);
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//添加协议标识
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readData.Add(0x00);
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readData.Add(0x00);
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//计算后面报文的长度
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if (funCode == FunCode.WriteSingleCoil || funCode == FunCode.WriteSingleRegister)
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{
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readData.Add(0x00);
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readData.Add(0x06);
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}
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else if (funCode == FunCode.WriteMultiCoil || funCode == FunCode.WriteMultiRegister)
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{
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int len = 6 + 1 + writeData.Length;
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readData.Add((byte)(len >> 8));
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readData.Add((byte)len);
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}
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//添加设备编号
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readData.Add((byte)deviceID);
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//添加功能码
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readData.Add((byte)funCode);
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//添加写入地址
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readData.Add((byte)(startAddr >> 8));
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readData.Add((byte)startAddr);
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//添加要写入的线圈的数量
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if (funCode == FunCode.WriteMultiCoil || funCode == FunCode.WriteMultiRegister)
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{
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readData.Add((byte)(datalen >> 8));
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readData.Add((byte)datalen);
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//添加要写入数据的字节数
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readData.Add((byte)writeData.Length);
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}
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//添加真实要写入的数据
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readData.AddRange(writeData);
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return readData.ToArray();
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}
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public ModbusErrorCode ReadUshortArr(int deviceID, FunCode funCode, int startAddr, int readLen, out int[] result)
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{
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result = new int[readLen];
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if (isConnected)
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{
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List<byte> receiveBuffer = new List<byte>();
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byte[] readDatas = GetReadCommand(deviceID, funCode, startAddr, readLen);
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try
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{
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int len = m_socket.Send(readDatas);
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if (len > 0)
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{
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//开始接收数据
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stopWatch.Restart();
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while (true && stopWatch.ElapsedMilliseconds <= timeout)
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{
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int receiveDataLen = m_socket.Available;
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if (receiveDataLen > 0)
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{
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byte[] buffer = new byte[receiveDataLen];
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len = m_socket.Receive(buffer, receiveDataLen, SocketFlags.None);
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if (len > 0)
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{
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receiveBuffer.AddRange(buffer);
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//判断数据是否接收完毕，
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if (receiveBuffer.Count >= 6)
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{
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//读取报文长度
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int packetLen = receiveBuffer[4] << 8 | receiveBuffer[5];
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if (receiveBuffer.Count == packetLen + 6)
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{
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int dataLen = receiveBuffer[8];
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//代表数据已经接受完毕,开始解析数据
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for (int i = 0; i < dataLen / 2; i++)
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{
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result[i] = receiveBuffer[(i * 2) + 9] << 8 | receiveBuffer[(i * 2) + 10];
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}
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}
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}
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return ModbusErrorCode.OK;
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}
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}
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}
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if (stopWatch.ElapsedMilliseconds >= timeout)
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{
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return ModbusErrorCode.TIMEOUT;
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}
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}
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else
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{
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return ModbusErrorCode.SENDFAIL;
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}
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}
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catch (Exception ex)
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{
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return ModbusErrorCode.EXCEPTION;
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}
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return ModbusErrorCode.OK;
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}
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else
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{
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//未连接
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return ModbusErrorCode.NOCONNECT;
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}
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}
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public ModbusErrorCode WriteSingleCoil(int deviceID, int startAddr, bool flag)
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{
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byte[] writeData = new byte[2] { 0x00, 0x00 };
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List<byte> receiveBuffer = new List<byte>();
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if (flag)
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{
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writeData[0] = 0xFF;
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writeData[1] = 0x00;
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}
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return Write(deviceID, FunCode.WriteSingleCoil, startAddr, writeData);
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}
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public ModbusErrorCode WriteCoils(int deviceID, int startAddr, bool[] flags)
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{
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byte[] writeData = new byte[((flags.Length - 1) / 8) + 1];
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int val = 0;
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for (int i = 0; i < flags.Length; i++)
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{
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if (flags[i])
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val = val | 1 << i;
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else
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val = val | 0 << i;
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}
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for (int i = 0; i < writeData.Length; i++)
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{
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writeData[i] = (byte)(val >> (i * 8));
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}
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return Write(deviceID, FunCode.WriteMultiCoil, startAddr, writeData, flags.Length);
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}
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public ModbusErrorCode WriteSingleRegister(int deviceID, int startAddr, ushort value)
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{
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byte[] writeData = new byte[2] { 0x00, 0x00 };
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List<byte> receiveBuffer = new List<byte>();
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writeData[0] = (byte)(value >> 8);
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writeData[1] = (byte)value;
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return Write(deviceID, FunCode.WriteSingleRegister, startAddr, writeData);
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}
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public ModbusErrorCode WriteMultiHoldRegister(int deviceID, int startAddr, ushort[] values)
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{
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byte[] writeData = new byte[values.Length * 2];
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for (int i = 0; i < values.Length; i++)
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{
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writeData[(i * 2)] = (byte)(values[i] >> 8);
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writeData[(i * 2) + 1] = (byte)(values[i]);
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}
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return Write(deviceID, FunCode.WriteMultiRegister, startAddr, writeData, values.Length);
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}
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private ModbusErrorCode Write(int deviceID, FunCode funCode, int startAddr, byte[] writeData, int writeLen = 0)
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{
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if (isConnected)
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{
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lock (this)
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{
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byte[] readDatas = GetWriteCommand(deviceID, funCode, startAddr, writeData, writeLen);
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try
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{
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List<byte> receiveBuffer = new List<byte>();
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int len = m_socket.Send(readDatas);
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if (len > 0)
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{
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//开始接收数据
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stopWatch.Restart();
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while (true && stopWatch.ElapsedMilliseconds <= timeout)
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{
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int receiveDataLen = m_socket.Available;
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if (receiveDataLen > 0)
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{
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byte[] buffer = new byte[receiveDataLen];
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len = m_socket.Receive(buffer, receiveDataLen, SocketFlags.None);
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if (len > 0)
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{
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receiveBuffer.AddRange(buffer);
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if (receiveBuffer.Count >= 6)
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{
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////判断数据是否接收完毕
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int framelen = receiveBuffer[4] << 8 | receiveBuffer[5];
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if (framelen + 6 == receiveBuffer.Count)
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{
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return ModbusErrorCode.OK;
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}
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}
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}
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}
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}
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if (stopWatch.ElapsedMilliseconds >= timeout)
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{
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return ModbusErrorCode.TIMEOUT;
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}
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}
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else
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{
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return ModbusErrorCode.SENDFAIL;
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}
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}
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catch (Exception ex)
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{
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return ModbusErrorCode.EXCEPTION;
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}
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return ModbusErrorCode.OK;
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}
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}
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else
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{
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//未连接
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return ModbusErrorCode.NOCONNECT;
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}
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}
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}
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public enum FunCode
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{
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/// <summary>
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/// 读取 多个线圈(位)
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/// </summary>
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ReadMultiCoil = 01,
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/// <summary>
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/// 读取 多个离散量输入量(位)
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/// </summary>
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ReadMultiInput = 02,
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/// <summary>
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/// 读取 多个保持寄存器(16进制整型)
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/// </summary>
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ReadMultiHoldRegister = 03,
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/// <summary>
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/// 读取 多个输入寄存器(16进制整型)
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/// </summary>
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ReadMultiInputRegister = 04,
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/// <summary>
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/// 写入 单个线圈(位)
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/// </summary>
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WriteSingleCoil = 05,
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/// <summary>
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/// 写入 单个寄存器(16进制整型)
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/// </summary>
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WriteSingleRegister = 06,
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/// <summary>
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/// 写入 多个线圈(位)
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/// </summary>
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WriteMultiCoil = 15,
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/// <summary>
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/// 写入 多个寄存器(16进制整型)
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/// </summary>
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WriteMultiRegister = 16
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}
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public enum ModbusErrorCode
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{
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OK,
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NOCONNECT,
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SENDFAIL,
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EXCEPTION,
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TIMEOUT
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}
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}
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