86
Section 3 Communications Commands
RFID System
User's Manual
Section 3
Commands
DATA CHECK (MDC/K)
This command writes or compares the CRC code using the specified check block unit. The CRC code
is calculated from the generated polynomial expression X
16
+ X
12
+ X
5
+ 1.
For details on the memory check, refer to Memory Check Function in Data Carrier.
p.108
Process setting Specifies the check process.
K: Check code calculation
C: Check code comparison
Processing area number
setting
Always 1.
Check block start
address
Specifies the start address of the check block in 4-digit hexadecimal.
Setting range: 0000h to 1FFDh
Number of check block
bytes
Specifies the number of bytes in the check block in 2-digit hexadecimal.
Setting range: 00h, 03h to FFh (00 = 256 bytes)
The number of check block bytes is the check code calculation area + 2 bytes.
For details, refer to Memory Check Function in Data Carrier.
p.108
End code Indicates the execution result for the command.
00: Normal completion
76: Data error warning (only during comparison control)
For details on end codes, refer to End code List.
p.95
Command
××
MD
××
C/K 1
××
211 4
Check block
start address
2
CR
Terminator
2
Number of check
block bytes
Command
code
Process
setting
Processing
area
number
setting
Response
MD
××
22
2
CR
Command
code
TerminatorEnd code
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