71
Heat-resistive RFID System
User's Manual
S
e
c
tion 4
Communic
a
tions
Comma
nds
Section 4
Reading from/Writing to Tags
OVERWRITE COUNT CONTROL (MDS/MDL)
This command is used to control the number of overwrite operations performed by Tags. Whether the
EEPROM overwrite count has been exceeded or not is determined by refreshing the user-specified
overwrite count control area.
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.
• Example
Setting an overwrite count of FF times using subtraction Controller No. 2 address 0010h.
Name
Details
Mode setting
Specifies the mode for the overwrite count.
S: User-specified overwrite count using subtraction method (16,700,000 max.)
L: Fixed overwrite count of 100,000 using addition method
Channel designation
Always 1
Start address
Specifies the start address of the overwrite count control area in 4-digit hexadecimal.
Setting range: 0000h to 03E5h
Number of refreshes
Specifies the number of refreshes in 2-digit hexadecimal.
Setting range: 00h to FFh (00: Checks number of refreshes only)
Name
Details
End code
Indicates the execution result for the command.
75: Specified overwrite count not exceeded
76: Specified overwrite count exceeded warning
Command
×
×
M
D
×
×
S/L
1
×
×
Channel
designation
Start address
Number of
refreshes
2
1
1
4
2
×
×
FCS
2
@
×
×
3
*
CR
Terminator
2
Controller No.
Mode
setting
Command
code
Response
M
D
×
×
FCS
7
5
End code
2
2
2
@
×
×
3
*
CR
Terminator
2
Command code
Controller No.
Command
F
F
M
D
1
0
S
1
0
0
Mode
setting
Channel
designation
Start address
Number of
refreshes
2
1
1
4
2
2
8
2
@
0
2
3
*
CR
2
Controller No.
FCS
Terminator
Command
code
Response
M
D
4
9
7
5
2
2
2
@
0
2
3
*
CR
2
Command code
End code
Controller No.
FCS
Terminator
