Omron V600 Series User Manual page 118

Section 5
Communications
MANAGEMENT DATA CHECK/CALCULATE (MDC/MDK)
These commands make it possible to write and verify the CRC code in a check block that the user des-
ignates. The CRC code is calculated using the formula X
■ 1:1 Communications
Command
Process
specifi-
Command code
cation
M D C/K
2
Process specification
R/W Head No.
Check block start address
No. of check block bytes
Response
End code
Command code
M D x
2 2
Terminator
Refer to Data Carrier Memory Check Function for details on memory checks.
RFID System
116
Operation Manual
R/W Head No.
No. of check
Check block start address
block bytes
1/2 x x x x
1 1 4
Specifies the check processing to perform.
C: Compare check code
K: Calculate check code
Specifies the Read/Write Head with which to communicate.
1: Read/Write Head 1
2: Read/Write Head 2
Specifies the first address of the check block as a four-digit hexadecimal number.
Specifiable range: 0000H to FFFDH
Specifies the number of bytes in the check block as a two-digit hexadecimal number.
Specifiable range: 00H and 03H to FFH (The maximum of 256 bytes will be read if 00H is speci-
fied.)
Specify two bytes more than the number of bytes in the area for which the check code is calcu-
lated.
Refer to Data Carrier Memory Check Function for details.
p.68
Terminator
x * CR
2
Indicates the results of command execution.
00: Normal end
75: Data normal (only when comparing check codes)
76: Data error warning (only when comparing check codes)
Refer to End Codes for more information.
p.135
p.68
16 + X 12
Terminator
x x * CR
2 2
+ X 5 + 1.