ACR1255U-J1 – Reference Manual info@acs.com.hkVersion V1.07 www.acs.com.hkPage 33 of 77This message will also include the error code whenever appropriate.Offset Field Size Value Description Encrypted0 bMessageType 1 51h Error handling response headerNo1 LEN1LEN2 (wLength) 2 00 00h -3 Slot Number 1 00h -4 Sequence 1 00h -3 bErrorCode 1 -Specify the error code for thepreviously processed commandmessage. The possible errorcodes are listed in as the tablebelow4 wChecksum 1 -wChecksum means the XORvalues of all bytes in thecommandField Value DescriptionbErrorCode01h Checksum error02h Timeout03h Command error04h Unauthorized05h Undefined error06h Received data errorTable 9: Mutual Authentication Error codes