87
RFID System
User's Manual
Section 3
l
Communications Commands
Section 3
Commands
OVERWRITE COUNT CONTROL (MDS)
This command is used to control the number of overwrite operations performed by EEPROM Data Car-
riers. This command determines whether the EEPROM overwrite count has been exceeded when the
specified number of overwrites is subtracted from the specified overwrite count control area data.
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(HEX)) will be
returned in the end code.
For details on controlling the overwrite count, refer to Data Carrier Service Life Detection.
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Mode setting Always S.
Processing area number
setting
Always 1.
Area start address Specifies the start address of the overwrite count control area in 4-digit hexadecimal.
Setting range: 0000h to 1FFDh
Decrement count Specifies the number of refresh operations in 2-digit hexadecimal.
Setting range: 00h to FFh (00 = Performs overwrite count check only)
For details, refer to Data Carrier Service Life Detection.
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End code Indicates the execution result for the command.
00: Normal completion
76: Data error warning
For details on end codes, refer to End code List.
p.95
Command
××
MD
××
S1
××
Mode
setting
211 4
2
CR
2
Decrement
count
Command
code
Area start address
Processing
area
number
setting
Terminator
Response
MD
00
22
2
CR
Command
code
TerminatorEnd code
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