示例#1
0
 public void clearDataCOM()
 {
     try {
         COMPort.DiscardInBuffer();
     }
     catch (Exception ex) {}
 }
示例#2
0
 private void ModbusSendReceive(object param)
 {
     lock (this)
     {
         try
         {
             ModbusParam parameters;
             if (param is ModbusParam)
             {
                 parameters = (ModbusParam)param;
             }
             else
             {
                 throw new ModbusPDUException("Wrong parametrization of ModbusSendReceive method.");
             }
             byte[] responseFrame = new byte[(int)parameters.ResponseSize];
             COMPort.DiscardInBuffer();
             COMPort.Write(parameters.RequestADU, 0, parameters.RequestADU.Length);
             Thread.Sleep(ResponseWaitingDelay);
             COMPort.Read(responseFrame, 0, (int)parameters.ResponseSize);
             byte[] adu = ModbusSerialPDU.extractADU(responseFrame);
             if (responseFrame[1] > (byte)127)
             {
                 throw new ModbusPDUException(String.Format("Modbus application error : function {0:X}, exception {1:X}", responseFrame[1], responseFrame[2]));
             }
             else
             if (responseFrame[1] == 0x03)
             {
                 Int16[] values = GetValuesFromResponseADU03(adu);
                 ModbusDataReceived(values);
             }
         }
         catch (Exception ex)
         {
             commException = ex;
             ModbusError(ex);
         }
     }
 }