48
S
E
CTI
O
N 4
Communic
a
tio
n
s
Comma
nds
Electromagnetic Inductive RFID System
User's Manual
SECTION 4
Commands
Memory Check (MD)
Calculates the check code for the specified block using the polynomial X
16
+X
12
+ X
5
+ 1, and verifies
the result against the check code attached to the check block.
Example: Adding a Check Code to 4 Bytes of Data from Address 0010h (Single Auto)
Send data:
MDSAK1001006
*
[CR]
Receive data: MD0000
*
[CR]
* The specified number of bytes will be 6, with 2 bytes of check code attached to 4 bytes of data.
Do not write required data in the last two bytes of the area. These two bytes are used to record the check code.
Refer to
for details.
Communications
designation
Specifies the method for communicating with a Tag.
Refer to
for details.
Process designation
Specifies the check process.
“K”: Check code calculation
“C”: Check code verification
Antenna designation
Always “1”.
Check block start address
Specifies the check block start address in four hexadecimal digits.
Specification range: 0000h to 007Dh
No. of check block bytes
Specifies the number of check block bytes in two hexadecimal digits.
Specification range: 03h to 80h
Status flag
Shows the check code verification result.
“0”: Verification normal
“1”: Verification error
2
2
1
1
4
2
2
㧖
CR
Command
code "MD"
Proc-
ess
desig-
nation
Antenna
designa-
tion
Check block start
address
Communica-
tions desig-
nation
No. of check
block bytes
Command
2
2
1
1
2
㧖
CR
Command
code "MD"
Retry
flag
Status
flag
End code
"00"
Response
Summary of Contents for V670-CF01
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