title: Modbus TCP master to multiple slave Connectivity
body: <p>I am developing a windows form to function as a modbus tcp Master Simulator.I am using NModbus library. 
  I want to connect to multiple slaves simultaneously and do the read and write operation,does the NModbus library supports this kind of implementation? and if so how?.
  Currently i am able to connect to single slave device and do the read/write operations,but i am stuck on how to the same with multiple slaves though.
  Should i use the threading Concept to achieve the same.
  Here is my code to connect to single slave device and do the read/write operation.</p>
  
  <pre><code>        private void btnConnect_Click(object sender, EventArgs e)
          {
              try
              {
                  TcpClient masterTcpClient = new TcpClient(txtIP.Text, 502);
                  master = ModbusIpMaster.CreateIp(masterTcpClient);
                  MessageBox.Show("Connected");
  
              }
              catch (SystemException error)
              {
                  MessageBox.Show(error.Message);
              }
  
          }
  
          private void btnReadCoil_Click(object sender, EventArgs e)
          {
              try
              {
  
                  byte slaveID = 255;
                  ushort startAddress = Convert.ToUInt16(txtStartaddress.Text);
                  ushort numInputs = Convert.ToUInt16(txtSize.Text);
                  bool[] inputs = master.ReadCoils(slaveID, startAddress, numInputs);
                  AnswerFromServer.Items.Clear();
                  for (int i = 0; i &lt; inputs.Length; i++)
                  {
                      AnswerFromServer.Items.Add(Convert.ToInt16(inputs[i]));
                  }
              }
              catch (Exception exc)
              {
                  MessageBox.Show(exc.Message, "Exception Reading values from Server", MessageBoxButtons.OK, MessageBoxIcon.Error);
              }
  
  
          }
  
          private void btnWriteSingleRegister_Click(object sender, EventArgs e)
          {
              try
              {
  
                  byte slaveID = 255;
                  ushort RegisterAddress = Convert.ToUInt16(txtStartaddress.Text);
                  ushort value = Convert.ToUInt16(txtSingleValue.Text);
                  master.WriteSingleRegister(slaveID, RegisterAddress, value);
  
              }
              catch (Exception exc)
              {
                  MessageBox.Show(exc.Message, "Exception writing values to Server", MessageBoxButtons.OK, MessageBoxIcon.Error);
              }
  
          }
  </code></pre>
  
  <p>Can any one please help me with this one?</p>