Omron V680-CA5D01-V2 User Manual page 128

DATA CHECK (MD C/K)
The DATA CHECK command is used to write or verify the CRC code in the specified check block. The
CRC code is generated using the following polynomial X
1:1 Protocol
Command
Antenna designation
Communi- Process
Command
cations design-
code
designation ation
× ×
M D C/K 1/2
2 2 1 1
Communications
designation
Process designation
Antenna designation
UID
Check block start address
No. of check block bytes
Response
Antenna
Resend flag
desig-
Command
End code
code nation
× × ×
M D 0
2 2 1 1
Note: When using the multi-access trigger communications designation (MT), the ID controller returns
an end code of 03 after communicating with all Tags.
End code
UID
Refer to Tag Memory Error Correction for details on memory checks.
p. 94
Check block
UID start address
...
× × × × × ×
0 or 16 4
Specifies the method of communications with the Tag.
Refer to Communications Designation Function for details on the communications designation.
p. 103
Specifies the check process.
"C": Check code verification
"K": Check code calculation
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
A unique identifier used to identify Tags.
Added only for the selective communications designation (SL).
Specifies the start address of the check block in 4-digit hexadecimal.
Setting range: 0000 to FFFD
H H
Specifies the number of bytes in the check block in 2-digit hexadecimal.
Setting range: 00 , 03 to FF (Specify 00H for 256 bytes.)
H H H
Specify the number of bytes in the check code calculation area plus two for the number of check
block bytes.
Refer to Tag Memory Error Correction for details.
p. 94
UID
Terminator
× × ... × × *
C R
0 or 16 2
Indicates the execution result for the command.
00: Normal end, Data normal (only when verification is performed)
76: Data error warning (only when verification is performed)
Refer to List of End Codes for information on other end codes.
p. 171
A unique identifier used to identify Tags.
Added only for multi-access communications designations (MT/MR).
16 + X 12 + X 5 + 1.
No. of check
block bytes Terminator
× × × × *
C R
2 2
SECTION 5
Communications
RFID System
125
User's Manual