private byte[] BuildReadCommand(ModBusFunctionMask mask, ushort address, ushort length)
{
ushort messageId = GetMessageId();
byte[] buffer = new byte[12];
buffer[0] = (byte)(messageId / 256);
buffer[1] = (byte)(messageId % 256);
buffer[5] = 0x06;
buffer[6] = station;
buffer[7] = (byte)mask;
buffer[8] = (byte)(address / 256);
buffer[9] = (byte)(address % 256);
buffer[10] = (byte)(length / 256);
buffer[11] = (byte)(length % 256);
return(buffer);
}
/// <summary>
/// 读取服务器的数据，需要指定不同的功能码
/// </summary>
/// <param name="function"></param>
/// <param name="address"></param>
/// <param name="length"></param>
/// <returns></returns>
private OperateResult <byte[]> ReadModBusBase(ModBusFunctionMask function, ushort address, ushort length)
{
OperateResult <byte[]> resultBytes = CheckModbusTcpResponse(BuildReadCommand(function, address, length));
if (resultBytes.IsSuccess)
{
// 二次数据处理
if (resultBytes.Content?.Length >= 9)
{
byte[] buffer = new byte[resultBytes.Content.Length - 9];
Array.Copy(resultBytes.Content, 9, buffer, 0, buffer.Length);
resultBytes.Content = buffer;
}
}
return(resultBytes);
}
private void userButton3_Click(object sender, EventArgs e)
{
// 00 00 00 00 00 06 FF 03 00 00 00 10
HslCommunication.OperateResult <byte[]> read = null;
ModBusFunctionMask mask = (ModBusFunctionMask)comboBox1.SelectedItem;
switch (mask)
{
case ModBusFunctionMask.ReadCoil:
{
// 读线圈
read = busTcpClient.ReadCoil(ushort.Parse(textBox4.Text), ushort.Parse(textBox5.Text));
break;
}
case ModBusFunctionMask.ReadDiscrete:
{
// 读离散值
read = busTcpClient.ReadDiscrete(ushort.Parse(textBox4.Text), ushort.Parse(textBox5.Text));
break;
}
case ModBusFunctionMask.ReadRegister:
{
// 读寄存器
read = busTcpClient.ReadRegister(ushort.Parse(textBox4.Text), ushort.Parse(textBox5.Text));
break;
}
default: break;
}
if (read != null)
{
if (read.IsSuccess)
{
textBox2.AppendText(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + " :" +
HslCommunication.BasicFramework.SoftBasic.ByteToHexString(read.Content, ' ') + Environment.NewLine);
}
else
{
MessageBox.Show(read.ToMessageShowString());
}
}
}
/// <summary>
/// 读取服务器的线圈，对应功能码0x01
/// </summary>
/// <param name="function"></param>
/// <param name="address"></param>
/// <param name="length"></param>
/// <returns></returns>
private OperateResult <byte[]> ReadModBusBase(ModBusFunctionMask function, ushort address, ushort length)
{
OperateResult <byte[]> resultBytes = ReadFromModBusServer(BuildReadCommand(function, address, length));
if (resultBytes.IsSuccess)
{
// 二次数据处理
if (resultBytes.Content?.Length >= 9)
{
byte[] buffer = new byte[resultBytes.Content.Length - 9];
Array.Copy(resultBytes.Content, 9, buffer, 0, buffer.Length);
resultBytes.Content = buffer;
}
else
{
// 数据异常
resultBytes.IsSuccess = false;
resultBytes.Message = "数据异常";
}
}
return(resultBytes);
}
