Omron V680-CA1D User Manual page 72

Section 4
Reading from/Writing to Tags
DATA CHECK (MD C/K)
This command writes or compares the CRC code for the specified check block in byte units. The CRC
code is calculated from the generated polynomial expression X
Command
Controller No.
×
@
3
Name
Process setting
Channel designation
Start address
Number of check block
bytes
Response
Controller No.
×
@
3
Name
End code
• Example
Adding the check code to 4-byte data from Controller No. 2 address 0010h.
Command
Controller No.
0
@
3
Response
Controller No.
@ 0
3
Heat-resistive RFID System
70
User's Manual
Command Process Channel
code setting designation
×
M D C/K 1
2 1 1
Specifies the check process.
C: Check code comparison
K: Check code calculation
Always 1
Specifies the start address of the check block in 4-digit hexadecimal.
Setting range: 0000h to 03E5h
Specifies the number of bytes for the check block in 2-digit hexadecimal.
Setting range: 03h to FFh, 00h (00: 256 bytes)
Command code End code
×
M D 0 0
2 2
Indicates the execution result for the command.
The end code 00 indicates normal completion. (calculation processing only)
75: Data normal (comparison processing only)
76: Data error warning (comparison processing only)
Command Data Antenna
code type designation
2 M D K 1
2 1 1
Command code End code
M D 0 0
2
2 2
16 + X
Number of check
Start address block bytes
× × × × ×
4
Details
FCS Terminator
× ×
*
CR
2 2
Details
Number of check
Start address block bytes
0 0 1 0 0
4
FCS Terminator
*
4 B
CR
2 2
12 + X 5 + 1.
FCS Terminator
× *
× ×
CR
2 2
2
FCS Terminator
*
6 CR
3 6
2 2 2