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Checking the Data Carrier Life
MDL Command Execution
Example
1,2,3...
58
Note Do not use MDS and MDL commands together in a Data Carrier. Doing so
would disable lifetime management.
MDL Command
The management area consists of three bytes beginning with the first address
of the area. When the MDL command is executed, the specified number of
overwriting operations is added from the present number and the result is writ-
ten to this area. If it is 100,000 (0186A0
returned as a warning. The number of overwriting operations up to the
present time is written in the management area as hexadecimal data. The
data can also be read using the read command.
If the number of overwriting operations in the management area is already
100,000 or over, the hexadecimal data value will not be renewed. In this case,
only the warning will be returned when the MDL command is executed. If the
MDL command is executed with 00
mal data but the number of overwriting operations up to the present time can
be checked.
First address of the area
In the following example, three bytes beginning with address 0010
ified as the management area for overwriting operations.
1. Clear the management area first with WTH10010000000.
2. Input 4 overwriting operations with MDL1001004.
3. Input 5 as the next number of overwriting operations with MDL1001005
make the total overwriting operations 9.
0010
00
H
H
0011
00
H
H
0012
00
H
H
) or over, end code 76 will be
H
, nothing will be written to the hexadeci-
H
Leftmost digit
Middle digit
Three bytes
Rightmost digit
0010
00
H
H
0011
00
H
H
0012
00
H
H
0010
00
H
H
0011
00
H
H
0012
04
H
H
Section 5-4
are spec-
H
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