51
Heat-resistive RFID System
User's Manual
S
e
c
tion 4
Ta
g M
e
mor
y
M
a
p
Section 4
Reading from/Writing to Tags
Tag Service Life Check
The OVERWRITE COUNT CONTROL command (MDS/MDL) determines whether the Tag overwrite count
has been exceeded.
The overwrite count is subtracted from the data in the user-specified overwrite count control area to
determine whether the number of overwrites have been exceeded. The MDL command can also be
used to determine whether the overwrite count (100,000 times) has been exceeded. The overwrite
count is added to the data in the user-specified overwrite count control area to determine whether the
100,000 overwrites have been exceeded.
Set the start address between
@@@
0H and
@@@
5H or between
@@@
8H and
@@@
DH. 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 in the end code.
Command
M
D
1
*
CR
× × × ×
S/L
Specifies the number of refreshes in hexadecimal.
(00
H
, 01
H
,
02
H
, to
FB
H
)
Read/Write Head channel setting (always 1)
Mode setting
S: Overwrite control count subtraction method, user-specified (16,700,000 max.)
Area start address setting range
(
@@@
0
H
to
@@@
5
H
, or
@@@
8
H
to
@@@
D
H
)
@
× ×
FCS
× ×
L: Overwrite count control addition method (100,000 fixed)
Response
M
D
5
7
End code
75: Within specified overwrite count
76: Specified overwrite count exceeded warning
@
× ×
*
CR
FCS