ACR1255U-J1 – Reference Manual info@acs.com.hkVersion V1.07 www.acs.com.hkPage 29 of 775.7.2. SPH_to_RDR_ReqAuthThis command will request ACR1255U-J1 to perform authentication with the paired key-generatingdevice.For more information on the authentication process, please refer to Authentication.Offset Field Size Value Description Encrypted0 bMessageType 1 6Bh -No1 LEN1 LEN2 (wLength) 2 00 05hThe Number of extrabytes in Data field, and isexpressed in two byteslong, and LEN1 is MSBwhile LEN2 is LSB3 Slot Number 1 00h -4 Sequence 1 00h -5 Parameter 1 00h Slot Status6 wChecksum 1 CBhCSUM means the XORvalues of all bytes in thecommand7 Data 5 E0 00 00 45 00h - NoThe response to this message is RDR_to_SPH_AuthRsp1 if the received command message is error-free. Otherwise, the response message will be RDR_to_SPH_ACK to provide the error information.
