code: public byte asControl(ProcessEvent e) throws KNXFormatException
  	{
  		final DPTXlator3BitControlled t = new DPTXlator3BitControlled(
  			DPTXlator3BitControlled.DPT_CONTROL_DIMMING);
  		t.setData(e.getASDU());
  		return t.getValueSigned();
  	}
docs: Returns the ASDU of the received process event as 3 Bit controlled datapoint value.
  <p>
  This method has to be invoked manually by the user (either in
  {@link #groupReadResponse(ProcessEvent)} or
  {@link ProcessListener#groupWrite(ProcessEvent)}), depending on the received
  datapoint type.
  
  @param e the process event with the ASDU to translate
  @return the received value of type 3 Bit controlled
  @throws KNXFormatException on not supported or not available 3 Bit controlled DPT