Optional MemoryFP0
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2.5 Backing Up the 10 K Step Type
2.5 Backing Up the 10 K Step Type
Recharging the internal backup battery
A secondary battery (rechargeable type) is used as the backup battery in the control
unit (10 K step type). When shipped, this battery is not charged; therefore, please make
sure it is sufficiently charged before using. Recharging is automatic when DC power is
supplied.
When backup is possible of operation memory
Relationship between recharging time and backup time
The number of days for the backup time changes with the proportion of recharging time.
Please use the graph below to verify the number of days for the backup time.
Relationship between recharging
time and backup time
20 %
10 day(25 ℃)
60 %
30 day(25℃ )
80 %
40day(25 ℃)
100 %
50day(25 ℃)
0 8 16 24 48 72
Recharging
time (h)
B
a
c
k
u
p
t
i
m
e
Number of days for backup depending on ambient temperature
The number of days for the backup differs, as shown in the table below, when
recharging is done for 72 hours at a certain ambient temperature.
Ambient temperature Number of days for backup time
70 C Approx. 14 days
25 C Approx. 50 days
−20 C Approx. 25 days
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