C# ModbusTcp（协议）

以下用例为读取线圈，可读取多个连续的线圈（01功能码）

            //起始地址var inputAddress = 4;//读取长度var inputReadLength = 8;var station = BitConverter.GetBytes(4)[0]; //从站地址var funCode = BitConverter.GetBytes(1)[0];//功能码var startAddress = BitConverter.GetBytes(inputAddress)[1];var endAddress = BitConverter.GetBytes(inputAddress)[0];var startLength = BitConverter.GetBytes(inputReadLength)[1];var endLength = BitConverter.GetBytes(inputReadLength)[0];TcpClient tcpClient = new TcpClient();tcpClient.Connect("", 502);byte[] by = new byte[]{//事物标识符0x00,0x00,//协议标识符 固定值0x00,0x00,//长度0x00,0x06,//从站地址station,//功能码funCode,startAddress, //起始地址endAddress,startLength, //读个数endLength};tcpClient.Client.Send(by);byte[] result = new byte[1024];var ulength = tcpClient.Client.Receive(result);var newResult = result.ToList().Take(ulength).ToArray();//输出报文var output = string.Join(" ", newResult.Select(x => x.ToString("X2")));//00 00 00 00 00 04 04 01 01 00//00 00 //事物标识符 服务器复制//00 00 //协议标识符 固定值//00 04 //长度//04    //从站地址//01    //功能码//01    //个数//00    //数值byte[] bol = new byte[newResult[8]];if (newResult[8] > 1){for (int i = 0; i < bol.Length; i++)bol[i] = newResult[8 + i + 1];var getbyte = ByteToBoolArray(bol, by[by.Length - 1]);getbyte.ToList().ForEach(x =>{Console.WriteLine(x);});}else{bol[0] = newResult[9];var getbyte = ByteToBoolArray(bol, by[by.Length - 1]);getbyte.ToList().ForEach(x =>{Console.WriteLine(x);});}}public static bool[] ByteToBoolArray(byte[] InBytes, int length){if (InBytes == null) return null;if (length > InBytes.Length * 8) length = InBytes.Length * 8;bool[] buffer = new bool[length];for (int i = 0; i < length; i++){int index = i / 8;int offect = i % 8;byte temp = 0;switch (offect){case 0: temp = 0x01; break;case 1: temp = 0x02; break;case 2: temp = 0x04; break;case 3: temp = 0x08; break;case 4: temp = 0x10; break;case 5: temp = 0x20; break;case 6: temp = 0x40; break;case 7: temp = 0x80; break;default: break;}if ((InBytes[index] & temp) == temp){buffer[i] = true;}}return buffer;}

其他读写削微修改一下即可，如写入多个连续的float类型（float需要注意字节排序规则 ABCD...）

00 00 
00 00 
00 0F //报文长度01 //从站地址10 //功能码
00 00 //起始地址
00 04 //读取长度
08   //字节长度
42 05 33 33 
42 05 33 33