Battery Lives Of Cpu Modules - Mitsubishi Electric QS001CPU User Manual

Qscpu series safety programmable controller melsec-qs series
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11
MAINTENANCE AND INSPECTION

11.3.1 Battery lives of CPU modules

QS001CPU
11
- 6
11.3 Battery Life and Replacement Procedure
11.3.1 Battery lives of CPU modules
Power-on Time
CPU Module
Type
Ratio
0%
30%
50%
70%
100%
* 1: The power-on time ratio indicates the ratio of programmable controller power-on time to one day
(24 hours).
(When the total power-on time is 12 hours and the total power-off time is 12 hours, the power-on
time ratio is 50%.)
* 2: The guaranteed value represents a battery life at 70
characteristic values of manufacturer-supplied memories (SRAM) and on the assumption of
storage within the ambient temperature range of -40 to 75
to 55
).
* 3: The actual service value (reference value) represents a battery life that is calculated based on the
values measured at storage ambient temperature of 40
only, as it varies with characteristics of the memory.
* 4: In the following status, the backup time after power OFF is 3 minutes.
•The battery connector is disconnected.
•The lead wire of the battery is broken.
Table11.3 Battery lives
Guaranteed
*1
*2
value
26,000hr
2.96 years
37,142hr
4.23 years
43,800hr
5.00 years
43,800hr
5.00 years
43,800hr
5.00 years
Battery lives
Actual service
After SM52 ON
value (Reference
(Backup time after
*3
value)
alarm
43,800hr
5.00 years
30 days
43,800hr
5.00 years
30 days
43,800hr
5.00 years
30 days
43,800hr
5.00 years
30 days
43,800hr
5.00 years
30 days
, which is calculated based on the
(operating ambient temperature of 0
. This value is intended for reference
*4
)
710hr
710hr
710hr
710hr
710hr

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