Omron V680-CA5D01-V2 User Manual page 126

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
Command
Antenna designation
Mode
Communi-
Command cations desig-
nation
code designation
× × ×
M D S/L 1/2
2 2 1 1
Communications
designation
Mode designation
Antenna designation
UID
Area start address
Decrement count
Note: The write life for EEPROM Tags is 300,000 writes at 40 ° C.
Response
Antenna
Resend flag
desig-
Command
End code
code nation
× × × ×
M D 0
2 2 1 1
Note: When using the multi-access trigger communications designation (MT), the ID controller returns
an end code of 03 after communicating with all Tags.
End code
UID
UID Area start address
...
× × × × × ×
0 or 16 4
Specifies the method of communications with the Tag.
Refer to Communications Designation Function for details on the communications designation.
p. 103
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.)
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
A unique identifier used to identify Tags.
Added only for the selective communications designation (SL).
Specifies the start address of the overwrite count control area in 4-digit hexadecimal.
Setting range: 0000 to FFFD
H H
Specifies the number of refresh operations in 2-digit hexadecimal.
Setting range: 00 to FF (00 : Performs overwrite count check only.)
H H H
Refer to Tag Service Life Check for details.
p. 91
UID
Terminator
× ... × × *
CR
0 or 16 2
Indicates the execution result for the command.
00: Normal end
76: Data error warning
Refer to List of End Codes for information on other end codes.
p. 171
A unique identifier used to identify Tags.
Added only for multi-access communications designations (MT/MR).
Decrement
Terminator
count
× × × *
C R
2 2
SECTION 5
Communications
RFID System
123
User's Manual