56
Checking the Data Carrier Life
Section 5-4
resistance, and does not indicate that the battery life is over. Accordingly, if a
Data Carrier is purchased and left unused for several months, activate the
battery by performing a read operation for about 10 minutes. (Activating the
battery in this way will run current through it, which will return the internal
resistance to its normal state. This will have almost no effect on the battery
life.)
5-4-2
EEPROM-type Data Carrier
The MDL and MDS commands can be used to check whether or not the num-
ber of overwriting operations for the EEPROM in an EEPROM-type Data Car-
rier has exceeded the allowable number.
The MDS command subtracts the number of overwriting operations from a
user-specified management area and makes it possible to check whether or
not the number of overwriting operations has exceeded a user-specified num-
ber.
The MDL command adds the number of overwriting operations to a user-
specified management area and makes it possible to check whether or not
the number of overwriting operations has exceeded 100,000. This command
is for EEPROM-type Data Carriers with a specification of 100,000 for the
allowable number of overwriting operations.
Note The MDS command can be used only with version 2.1 or later. Refer to
page 12 for details on the method used to check the version.
Command Format
Response Format
Note
1.
The first address must be
@@@
0
H
to
@@@
5
H
or
@@@
8
H
to
@@@
D
H
. Do
not specify
@@@
6
H
to
@@@
7
H
or
@@@
E
H
to
@@@
F
H
as the first address,
otherwise address error code 7A (hexadecimal) will be returned.
2.
The unit number is required for 1-to-n procedure.
Read/Write head word (fixed to 1)
First address specification
(
@@@
0
H
to
@@@
5
H
or
@@@
8
H
to
@@@
D
H
)
Specify a hexadecimal value (00
H
, 01
H
,
02
H
,..., FB
H
) for the number of overwriting
operations to be added or subtracted.
M D S/L 1 X X X X X X CR
∗
Mode specification
S: Subtraction method used. The allowable number of
overwriting operations is specified by the user
(16,700,000 max.) Note that the specification for the
allowable number of overwriting operations for an
EEPROM-type Data Carrier is 300,000 at
temperatures of less than 40
°
C.
L: Addition method used. When using this command, the
allowable number of overwriting operations is
100,000.
M D 7 5 CR
∗
End code
75: The number of overwriting operations has not exceeded the allowable number.
76: The number of overwriting operations has exceeded the allowable number.
Summary of Contents for V600 RFID System
Page 1: ...OPERATION MANUAL Cat No Z193 E1 01 Board Type ID Controller V600 RFID System V600 CM1D...
Page 2: ...V600 RFID System V600 CM1D Board Type ID Controller Operation Manual Produced December 2003...
Page 3: ...iv...
Page 7: ...viii...
Page 10: ...xii...
Page 16: ...6 User I O Section 1 4...
Page 24: ...14 Outline Size Section 2 5...
Page 60: ...50 Communication Time Section 4 6...
Page 82: ...72 Index...
Page 84: ...74 Revision History...
Page 87: ...V6001 RFID System V600 CM1D Board Type ID Controller Cat No Z193 E1 01 OPERATION MANUAL...