Omron V680-CA1D User Manual page 55

• MDL Command
The overwrite count control area consists of 3 bytes
from the start address. The increment value from the
overwrite count is written in this area, and if this
value is 100,000 (0186A0H) or higher, an end code
76 will be given as a warning. The number of
overwrites is controlled using hexadecimal values,
and can be read using the READ command.
If the control area data is already 100,000 or higher,
the control area value will not be refreshed, and only
a warning will be returned as a response. When the
refresh count is set as 00H, the count will not be
updated, and only an overwrite count check will be
performed.
Example Using Overwrite Count Control Command (MDL)
In the following example, the three bytes from address 0010H is the overwrite count control area
(1) Clear the control area.
@××WTH10010000000[FCS]*CR
0010
0011
0012
(3) Next, enter the overwrite count of 5.
@××MDL1001005[FCS]*CR
The total overwrite count is 9 times.
0010
0011
0012
Do not execute the MDS command and MDL command together for the same Tag. Doing so will prevent managing the
service life.
0 0
H
0 0
H
0 0
H
0 0
H
0 0
H
0 9
H
Reading from/Writing to Tags
Area start address →
Upper digit
Middle digit
Lower digit
(2) Enter the overwrite count of 4.
@××MDL1001004[FCS]*CR
0010
0011
0012
(4) The accumulated count is 100,000 times.
"@××MD76[FCS]*CR"
(overwrite count exceeded.)
0010
0011
0012
Heat-resistive RFID System
Section 4
3 bytes
0 0
H
0 0
H
0 4
H
0 4
H
8 6
H
A D
H
53
User's Manual