private void Convert(int value)
        {

            int sub;

            string data = "";

            while (true)
            {
                sub = value % 2;
                data = sub.ToString() + data;
                value = value / 2;

                if (value == 0)
                    break;
            }

        }

// 또 PLC관련 내용이다...
// 숫자형을 2진수로 변환할때.... '3' -> 0000 0011