Mitsubishi MELSEC Q Series User Manual

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5.7 Battery Specifications, Installation and Replacement
5.7.3 Replacing battery
5
SETTINGS AND PROCEDURES BEFORE OPERATION
(2) Life of C Controller module battery (Q6BAT)
The following indicates the life of the C Controller module battery.
* 1 The power-on time ratio indicates the percentage of power-on time in a single day (24 hours).
(The power-on time ratio is 50% when the total power-on time is 12 hours and the total power-off
time is 12 hours.)
* 2 The guaranteed battery service life; equivalent to the total power failure time that is calculated
based on the characteristics value of the memory (SRAM) supplied by the manufacturer and
under the storage ambient temperature range of -25 to 75 (operating ambient temperature of 0
to 55 ).
* 3 The actual battery service life; equivalent to the total power failure time that is calculated based on
the measured value and under the storage ambient temperature of 40 . This value is intended
for reference only, as it varies with characteristics of the memory.
* 4 The guaranteed time after power-off is 3 minutes when:
• The battery connector is disconnected, or
• The battery lead is broken.
Table5.8 Battery life
Power-on
time ratio
*1
Battery life
Guaranteed value
(70 )
*2
Actual service value
(Reference value)
*3
(40 )
Guaranteed time after battery error
occurrence
*4
0%
18,000 hr
2.05 years
43,800 hr
5 years
1,100 hr
45 days
30%
25,714 hr
2.93 years
43,800 hr
5 years
1,100 hr
45 days
50%
36,000 hr
4.10 years
43,800 hr
5 years
1,100 hr
45 days
70%
43,800 hr
5 years
43,800 hr
5 years
1,100 hr
45 days
100%
43,800 hr
5 years
43,800 hr
5 years
1,100 hr
45 days
IMPORTANT
If the battery is not replaced after battery error occurrence, the data in the standard ROM
or battery-backed-up RAM and the clock data may be corrupted, or a file system error
may occur.

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English