public void clearDataCOM()
{
try {
COMPort.DiscardInBuffer();
}
catch (Exception ex) {}
}
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);
}
}
}