Mitsubishi A2USCPU(S1), User Manual

Page: 163 / 272

10 - 4
10. MAINTENANCE AND INSPECTION
10.3 Battery Replacement
M9006 or M9007 is turned ON when voltage of the battery for backing up programs and
power failure compensation function drops. Even though programs and contents of power
failure compensation function are not erased immediately when these special relays
become ON, the contents could be erased if the ON-status of the special relay fails to be
recognized.
Replace the battery while the total period of power failure is less than shown in Table 10.3
from when the M9006 or M9007 is turned ON.
Yardstick for battery life and the specifics of replacement are explained below.
10.3.1 Battery life
The battery life is shown in Table 10.3.
DANGER
Properly connect batteries. Do not charge, disassemble, heat or throw them into the
fire and do not make them short-circuited and soldered.
Incorrect battery handling may cause personal injuries or a fire due to exothermic
heat, burst and/or ignition.
Table10.3 Battery life
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 F or
later)
*6
0%
3600 hr
0.4 years
9400 hr
1.1 years
10800 hr
1.2 years
168 hr
7 days
30%
5140 hr
0.6 years
13400 hr
1.5 years
15400 hr
1.8 years
168 hr
7 days
50%
7200 hr
0.8 years
18800 hr
2.1 years
21600 hr
2.5 years
168 hr
7 days
100%
43800hr
5 years
43800hr
5 years
43800hr
5 years
168 hr
7 days