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Communica
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Comma
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RFID System
Operation Manual
Section 5
Communications
MANAGEMENT DATA SUBTRACTION/LIMIT (MDS/MDL)
These command are used to control the number of times that a Data Carrier without a battery can be
overwritten. By updating the management area designated by the user, the user can determine
whether the number of times the EEPROM has been overwritten exceeds the set number.
■
1:1 Communications
Note: The write life of a Data Carrier without a battery at an ambient temperature of 40
C is 300,000
overwrites.
If the start address is set between
@@@
6H and
@@@
7H or between
@@@
EH and
@@@
FH, an address error (error
code: 7A hexadecimal) will be returned as the end code.
Mode specification
Specifies the check processing to perform.
S: Subtraction (The number of overwrites can be set to any value up to 16,700,000 overwrites.)
(See note.)
L: Addition limit (The overwrite limit is always 100,000 overwrites.)
R/W Head No.
Specifies the Read/Write Head with which to communicate.
1: Read/Write Head 1
2: Read/Write Head 2
Area start address
Specifies the first address of the overwrite control area as a four-digit hexadecimal number.
Specifiable range:
@@@
0H to
@@@
5H or
@@@
8H to
@@@
DH
Decrement/increment
count
Specifies the number of counts to update the overwrite count as a two-digit hexadecimal number.
Specifiable range: 00H to FFH (The overwrite could will only be checked if 00H is specified.)
Refer to
Data Carrier Service Life Detection
for details.
End code
Indicates the results of command execution.
75: Normal end
76: Data error warning
Refer to
for more information.
x
x
Command code
M
D
x
x
S/L
1/2
x
x
2
1
1
4
Terminator
2
*
CR
Area start address
2
Decrement/
increment count
Mode
specifi-
cation
R/W Head No.
Command
Response
Command code
M
D
7
5
2
2
2
*
C R
End code
Terminator
Summary of Contents for V600 Series
Page 50: ...48 Section 2 Wiring RFID System Operation Manual Section 2 Installation and Wiring MEMO ...
Page 72: ...70 Section 4 Write Command Memory RFID System Operation Manual Section 4 Function ...
Page 138: ...136 Section 5 End Codes RFID System Operation Manual Section 5 Communications MEMO ...