55
Checking the Data Carrier Life
Section 5-4
5-4
Checking the Data Carrier Life
5-4-1
SRAM-type Data Carrier
Checking Battery Voltage Drop
1,2,3...
1.
A voltage drop of the battery cannot always be checked but can be
checked only when specific access is made.This is because, to check the
battery voltage, a certain amount of current is temporarily allowed to flow
through the internal circuit of the data carrier. If the battery voltage is
checked each time the data carrier is accessed, the battery life is short-
ened. It is recommended that a routine that checks the battery once a day
be incorporated in the system program.
2.
Access to check battery voltage:
The battery is checked only when the 2-byte data of addresses 0000 and
0001 are read.
<Battery voltage check command>
a) Read command ... RD H 1 0000 02
b) Auto read command ... AR H 1 0000 02
c)
Polling auto read ... PR H 1 0000 02
d) Expansion read command ... XR H 1000 02
3.
Response when battery voltage drops:
If the battery voltage has dropped, “7B” is returned as the end code of a
response.
Example:
Battery Life of the Data Carrier After Battery Voltage Drop
The Data Carrier can still be used for about 1 month under ordinary operating
conditions, even if the voltage of the battery has dropped below the rated
level. However, it is recommended that the Data Carrier be replaced with a
new one as soon as possible.
The battery-replaceable V600-D2KR16 can still be used for about 2 weeks
under ordinary operating conditions, even if the voltage of the battery has
dropped below the rated level. However, it is recommended that the battery
be replaced with a new one as soon as possible.
Note SRAM-type Data Carriers (excluding the V600-D2KR16) have a built-in thio-
nyl chloride lithium battery. Due to the characteristics of thionyl chloride lith-
ium batteries, the internal resistance of the battery increases when it is
unused for several months. If the battery voltage drop is checked on a Data
Carrier in this condition, a voltage drop will result even though the battery life
is still satisfactory. This phenomenon is due to the increase in the internal
RD 0 0 0 9 9 0 *
AR 0 0 0 9 9 0 *
RD 7 B 0 9 9 0 *
AR 7 B 0 9 9 0 *
Normal state
Normal completion code
Read data
Produced in Sept., 1990
When battery voltage drops
Battery error code
Read data
Produced in Sept., 1990
Summary of Contents for V600 RFID System
Page 1: ...OPERATION MANUAL Cat No Z193 E1 01 Board Type ID Controller V600 RFID System V600 CM1D...
Page 2: ...V600 RFID System V600 CM1D Board Type ID Controller Operation Manual Produced December 2003...
Page 3: ...iv...
Page 7: ...viii...
Page 10: ...xii...
Page 16: ...6 User I O Section 1 4...
Page 24: ...14 Outline Size Section 2 5...
Page 60: ...50 Communication Time Section 4 6...
Page 82: ...72 Index...
Page 84: ...74 Revision History...
Page 87: ...V6001 RFID System V600 CM1D Board Type ID Controller Cat No Z193 E1 01 OPERATION MANUAL...