Omron V600 Series Operation Manual page 27

Data Carrier Memory Map
EEPROM DC without Battery
Command Format
R/W Head number
(1 for head 1 and 2 for head 2)
Start address number specification range (
5H or 8H to
Response Format
The following are responses to Read and Auto Read commands sent to a DC
with a low battery:
Low battery completion code
Under ordinary operating conditions the DC can be used for about 1 month after
a low battery completion code is received. However, it is recommended that the
data carrier battery be replaced with a new one as soon as possible.
Note The DC contains a thionyl chloride-type lithium battery. One characteristic of this
type of battery is its tendency to develop a higher internal resistance when it is
not used. If the battery isn't used for several months, the internal resistance can
increase enough to cause a low battery response, even if the battery is good.
Consequently, after several months of disuse it is recommended to transmit data
to/from the DC for about 10 minutes to "warm up" the battery and decrease its
internal resistance. This operation will have almost no effect on the useful life of
the battery.
The MDL command makes it possible to check whether or not the EEPROM of a
DC has been overwritten 100,000 times or more by adding the data on overwrit-
ing operations to the management area designated by the user.
M D L 1/2
0H to
DH)
M D 7 5
The management area consists of the first three bytes. If the EEPROM is over-
written 100,000 (0186A0) times or more, an end code warning of 76 will be
returned. The number of overwriting operations is written in hexadecimal code in
the management area. It is possible to read the data from the management area
using the read command.
RD 0 0 0 9 9 5 *
AR 0 0 0 9 9 5 *
Read data
Production date: Sept., 1995
X X X X X
Designate the number to be added in HEX
(hexadecimal) code (00H, 01H, 02H, ..., FFH).
Note: The unit number is required in
∗
* s
the 1 to N procedure.
End code
75: Within 100,000 times
76: Exceeded 100,000 times
Section
∗
* s
X
3-2
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