MDBUS_CRC16

public class myCheack {
	
	private static int[] i16CRCTalbeAbs = { 
	0x0000, 0xcc01, 0xd801, 0x1400, 0xf001, 0x3c00, 0x2800, 0xe401, 
    0xa001, 0x6c00, 0x7800,0xb401, 0x5000, 0x9c01, 0x8801, 0x4400};
	
	public int Crc16_Check(byte[] uchMsg, int usDataLen)
    {
        int i16Crc;
        int i;
        byte byTmp;
        
        if (uchMsg == null) return (0);

        i16Crc = 0xffff;
        for (i = 0; i < usDataLen; i++)
        {
        	byTmp = uchMsg[i];
            i16Crc = (int)(i16CRCTalbeAbs[(byTmp ^ i16Crc) & 15] ^ (i16Crc >> 4));
            i16Crc = (int)(i16CRCTalbeAbs[((byTmp >> 4) ^ i16Crc) & 15] ^ (i16Crc >> 4));
        }

        i16Crc = (int)(((i16Crc >> 8) & 0x00ff) | ((i16Crc << 8) & 0xff00));
        return (i16Crc);
    }	

}