Omron V680-CA5D01-V2

217
RFID System
User’s Manual
SECTION 5
V600 Commands
SECTION 5
Communications
 OVERWRITE COUNT CONTROL (MD S/L)
The OVERWRITE COUNT CONTROL command is used to manage overwrite counts for EEPROM
Tags.
The specified overwrite count control area data is updated to enable determining when the EEPROM's
write life has expired.
 1:1 Protocol
Note: The write life for EEPROM Tags is 300,000 writes at 40°C.
When set to @@@6H to @@@7H or @@@EH to @@@FH, an address error (code: 7A (hexadecimal)) will be returned as
the end code.
Mode designation Specifies the check process.
“S”: Subtraction (Overwrite control count can be set by user.) (16,700,000 writes max.)
(See note.)
“L”: Addition (Overwrite control count fixed at 100,000 writes.)
Antenna designation Specifies the Antenna with which to communicate.
“1”: Antenna 1
“2”: Antenna 2
Area start address Specifies the start address of the overwrite count control area in 4-digit hexadecimal.
Setting range: @@@0
H to @@@5H or @@@8H to @@@DH
Decrement count Specifies the number of refresh operations in 2-digit hexadecimal.
Setting range: 00
H to FFH (00H: Performs overwrite count check only)
Refer to Tag Service Life Check for details.
p. 91
End code Indicates the execution result for the command.
75: Normal end
76: Data error warning
Refer to List of End Codes for information on other end codes.
p. 235
MD
S/L 1/2
211 4
2
*
CR
2
Command
code
Terminator
Antenna
designation
×
Mode
desig-
nation
Area start address
Decrement
count
×
××××
Command
Response
MD
75
22
2
* CR
Command
code
Terminator
End code