private static int convertByteToBcd(byte incomingByte) {
            int dec = (incomingByte >> 4) * 10;
            return dec + (incomingByte & 0x0f);
        }
converts incoming byte to an integer regarding used BCD format

@param incomingByte the incoming byte
@return converted BCD number
plc4j/drivers/s7/src/main/java/org/apache/plc4x/java/s7/readwrite/utils/StaticHelper.java