/// <summary>
/// 根据类型地址以及需要写入的数据来生成指令头
/// </summary>
/// <param name="type"></param>
/// <param name="address"></param>
/// <param name="data"></param>
/// <returns></returns>
protected byte[] GetWriteCommand(MelsecDataType type, ushort address, byte[] data)
{
byte[] _PLCCommand = new byte[21 + data.Length];
//默认信息----注意：高低字节交错
_PLCCommand[0] = 0x50; //副标题
_PLCCommand[1] = 0x00;
_PLCCommand[2] = NetworkNumber; //网络号
_PLCCommand[3] = 0xFF; //PLC编号
_PLCCommand[4] = 0xFF; //目标模块IO编号
_PLCCommand[5] = 0x03;
_PLCCommand[6] = NetworkStationNumber; //目标模块站号
_PLCCommand[7] = (byte)((_PLCCommand.Length - 9) % 256); //请求数据长度
_PLCCommand[8] = (byte)((_PLCCommand.Length - 9) / 256);;
_PLCCommand[9] = 0x0A; //CPU监视定时器
_PLCCommand[10] = 0x00;
_PLCCommand[11] = 0x01; //批量读取数据命令
_PLCCommand[12] = 0x14;
_PLCCommand[13] = type.DataType; //一点为单位成批读取
_PLCCommand[14] = 0x00;
_PLCCommand[15] = (byte)(address % 256);; //起始地址的地位
_PLCCommand[16] = (byte)(address / 256);
_PLCCommand[17] = 0x00;
_PLCCommand[18] = type.DataCode;//指明写入的数据
if (type.DataType == 1)
{
_PLCCommand[19] = (byte)(data.Length * 2 % 256);//软元件长度的地位
_PLCCommand[20] = (byte)(data.Length * 2 / 256);
}
else
{
_PLCCommand[19] = (byte)(data.Length / 2 % 256);//软元件长度的地位
_PLCCommand[20] = (byte)(data.Length / 2 / 256);
}
Array.Copy(data, 0, _PLCCommand, 21, data.Length);
return(_PLCCommand);
}
/// <summary>
/// 向PLC写入数据，针对D和W的方式，数据格式为有符号的short数组
/// </summary>
/// <param name="type">写入的数据类型</param>
/// <param name="address">初始地址</param>
/// <param name="data">有符号的short数组</param>
/// <returns>结果</returns>
public OperateResult WriteIntoPLC(MelsecDataType type, ushort address, short[] data)
{
byte[] temp = GetBytesFromArray(data, false);
return(WriteIntoPLC(type, address, temp));
}
/// <summary>
/// 使用Unicode编码向PLC写入字符串数据，针对W,D的方式，数据为字符串
/// </summary>
/// <param name="type">写入的数据类型</param>
/// <param name="address">初始地址</param>
/// <param name="data">字符串数据信息</param>
/// <returns>结果</returns>
public OperateResult WriteUnicodeStringIntoPLC(MelsecDataType type, ushort address, string data)
{
byte[] temp = Encoding.Unicode.GetBytes(data);
return(WriteIntoPLC(type, address, temp));
}
/// <summary>
/// 向PLC写入ASCII编码字符串数据，针对W,D的方式，数据为字符串
/// </summary>
/// <param name="type">写入的数据类型</param>
/// <param name="address">初始地址</param>
/// <param name="data">字符串数据信息</param>
/// <returns>结果</returns>
public OperateResult WriteAsciiStringIntoPLC(MelsecDataType type, ushort address, string data)
{
byte[] temp = Encoding.ASCII.GetBytes(data);
temp = SingularTurnEven(temp);
return(WriteIntoPLC(type, address, temp));
}
/// <summary>
/// 从三菱PLC中读取想要的数据，返回读取结果
/// </summary>
/// <param name="type">想要读取的数据类型</param>
/// <param name="address">读取数据的起始地址</param>
/// <param name="length">读取的数据长度，字最大值960，位最大值7168</param>
/// <returns>带数据头的字节数组</returns>
public OperateResult <byte[]> ReadFromPLC(MelsecDataType type, ushort address, ushort length)
{
OperateResult <byte[]> result = new OperateResult <byte[]>();
//获取指令
byte[] _PLCCommand = GetReadCommand(type, address, length);
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
HslTimeOut timeout = new HslTimeOut()
{
WorkSocket = socket
};
try
{
ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadPoolCheckConnect), timeout);
socket.Connect(new IPEndPoint(PLCIpAddress, GetPort()));
timeout.IsSuccessful = true;
}
catch
{
ChangePort();
result.Message = StringResources.ConnectedFailed;;
socket.Close();
return(result);
}
byte[] DataHead = null;
try
{
socket.Send(_PLCCommand);
//先接收满9个数据
int NeedReceived = 9;
DataHead = NetSupport.ReadBytesFromSocket(socket, NeedReceived);
NeedReceived = BitConverter.ToUInt16(DataHead, 7);
DataHead = NetSupport.ReadBytesFromSocket(socket, NeedReceived);
//获取读取代码
result.ErrorCode = BitConverter.ToUInt16(DataHead, 0);
result.Content = new byte[DataHead.Length - 2];
Array.Copy(DataHead, 2, result.Content, 0, DataHead.Length - 2);
if (type.DataType == 1)
{
result.Content = ReceiveBytesTranslate(result.Content);
}
result.IsSuccess = true;
}
catch (Exception ex)
{
result.Message = StringResources.SocketIOException + ex.Message;
socket.Close();
return(result);
}
socket.Shutdown(SocketShutdown.Both);
socket.Close();
socket = null;
if (result.ErrorCode > 0)
{
result.IsSuccess = false;
}
return(result);
}
/// <summary>
/// 解析数据地址
/// </summary>
/// <param name="address">数据地址</param>
/// <param name="type">类型</param>
/// <param name="startAddress">其实地址</param>
/// <param name="result">结果数据对象</param>
/// <returns></returns>
private bool AnalysisAddress(string address, out MelsecDataType type, out ushort startAddress, OperateResult result)
{
try
{
switch (address[0])
{
case 'M':
case 'm':
{
type = MelsecDataType.M;
break;
}
case 'X':
case 'x':
{
type = MelsecDataType.X;
break;
}
case 'Y':
case 'y':
{
type = MelsecDataType.Y;
break;
}
case 'D':
case 'd':
{
type = MelsecDataType.D;
break;
}
case 'W':
case 'w':
{
type = MelsecDataType.W;
break;
}
case 'L':
case 'l':
{
type = MelsecDataType.L;
break;
}
default: throw new Exception("输入的类型不支持，请重新输入");
}
startAddress = Convert.ToUInt16(address.Substring(1));
}
catch (Exception ex)
{
result.Message = ex.Message;
type = null;
startAddress = 0;
return(false);
}
return(true);
}