Newland NLS-EM2000 User Manual page 15

Reply: {Prefix2} {Types} {Lens} {Datas} {FCS}
1) Success message:
Prefix2 : 0x02 0x00
Types : 0x00 (success)
Lens : The number of data returned. If Lens=0x00, that means values of 256 contiguous
Datas : 0x00~0xFF, data that are returned.
FCS : CRC-CCITT checksum.
2) CRC check failure message:
Prefix2 : 0x02 0x00
Types : 0x01 (CRC check failure)
Lens : 0x01
Datas : 0x00
FCS : CRC-CCITT checksum (0x04 0x01)
3) Invalid command message:
Prefix2 : 0x02 0x00
Types : 0x03 (invalid command)
Lens : 0x01
Datas : 0x00
FCS : CRC-CCITT checksum (0x6A 0x61)
5
registers are returned.