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BAT.LOW Indicator
BAT.LOW indicator will be on when the battery is in low voltage. When this happens,
change the battery as soon as possible in case your program and data saved in the
latched area will be lost.
After the power is switched off, the data in the latched area will be stored in the SRAM
memory, and its power will be supplied by the battery. Therefore, when the battery is in
low voltage and the power-off status has been lasting for more than 1 minute, the data in
the latched area will be lost. If you need to permanently save the data in the latched
area in the program and device D, see the "permanently saved mechanism" and
"recover mechanism" sections below.
Permanently saved mechanism
Use PMSoft (Options -> PLC<=>Flash) to permanently save the data in the latched area
in Flash ROM memory. The newly indicated data will replace all data previously saved in
the memory.
Recover mechanism
If the battery is in low voltage before the power is switched off when the BAT.LOW
indicator is on, and the power is off for more than 1 minute, the PLC will automatically
restore the data in the latched area in the program and device D of Flash ROM into
SRAM memory next time when it is re-powered.
Battery Life
Temperature (ºC)
Life (year)
-30
0
10
9
25
50
8
6
- 7 -
70
5
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