Mitsubishi A2USCPU(S1), User Manual

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10 - 5
MAINTENANCE AND INSPECTION 10.
*1 The power time ratio indicates the percentage of power-on time per day (24 hours).
(The power-on time ratio is 50% when the total power-on time is 12 hours and the total
powerofftime is 12 hours.)
*2 The guaranteed value represents a battery life at 70 , which is calculated based on
characteristic values of manufacturer-supplied memories (SRAM) and on the assumption of
storage within the ambient temperature range of -20 to 70
(operating ambient temperature
of 0 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
and 25 . This value is
intended for reference only, as it varies with characteristics of the memory.
*4 The guaranteed time after power-off is 10 minutes when:
The battery connector is disconnected,
The battery lead wire is broken.
*5 The battery duration (maximum life) is 5 years (43,800 hours).
*6 For details of how to cheak a hardwear version,refer to Section 4.5.1.
Yardsticks for preventive maintenance are as follows:
CPU model name
Current-carrying
Hour Rate
*1
Battery Life
*5
Guaranteed
Value
*2
Actual Value (TYP)
*3 After Turning ON
M9006 or
M9007
(Power failure
compensation
time
after alarm
occurrence
*4
)
Ambient
Temperature
40
Ambient
Temperature
25
A1SHCPU-S1
(Hardwear version E or
earlier)
*6
A2USCPU
A2USCPU-S1
A2ASCPU
A2ASCPU-S1
A2ASCPU-S30
0%
3600 hr
0.4 years
3900 hr
4.5 years
43800 hr
5 years
168 hr
7 days
30%
5140 hr
0.6 years
43800 hr
5 years
43800 hr
5 years
168 hr
7 days
50%
7200 hr
0.8 years
43800 hr
5 years
43800 hr
5 years
168 hr
7 days
100%
43800 hr
5 years
43800 hr
5 years
43800 hr
5 years
168 hr
7 days
[1] Replace a battery in 4 or 5 years even when the battery has been used less than
the guaranteed time shown in the table above.
[2] Replace a battery when the battery has been used exceeding the guaranteed
time and M9006 is on.