Mitsubishi Electric MELSEC Q Series User Manual page 114

5
PRE-OPERATION PROCEDURES
(3) Battery life (Q6BAT)
5
- 13 5.4 Battery
5.4.3 Detecting a battery error and replacing the battery
(a) The table below shows the life of the EtherNet/IP module battery.
Power-on time
Guaranteed value
*1
ratio
26000 hr
0%
2.96 years
37142 hr
30%
4.23 years
43800 hr
50%
5 years
43800 hr
70%
5 years
43800 hr
100%
5 years
* 1 The power-on time ratio indicates the percentage of the power-on time per day (24hours).
(In the case of 12 hours of power on and 12 hours of power off, the power-on time ratio is 50%.)
* 2 The guaranteed value is a battery life at 70°C, which is guaranteed based on the characteristics
of the parts manufacturer-supplied memory (SRAM), assuming that the battery is stored within
the ambient temperature range from -25°C to 75°C (or used within the ambient temperature range
from 0°C to 55°C).
* 3 The actual usage value (reference value) is a battery life calculated based on the actual values
measured at a storage ambient temperature of 40°C. This value is for reference only because it
varies depending on the characteristic variations of the components.
* 4 In the following states, the guaranteed time after power off is three minutes.
The battery connector is disconnected.
The lead wire of the battery is cut off.
(b) The life of the battery (Q6BAT) is 5 years if it is not connected to the EtherNet/IP
module.
(c) After the Battery status (Un\G25783) turns on, replace the battery quickly even
though the data will be retained for a certain period of time.
Periodical battery replacement is recommended according to the operating
condition even before occurrence of a battery error.
POINT
The error log may be cleared if the battery is not replaced after a battery error
occurs.
Table 5.5 Battery life
Battery life
Actual usage value
*2
(MIN) (TYP)
43800 hr
5 years
43800 hr
5 years
43800 hr
5 years
43800 hr
5 years
43800 hr
5 years
Guaranteed time
*3
after a battery error
1500 hr
62 days
1500 hr
62 days
1500 hr
62 days
1500 hr
62 days
1500 hr
62 days
*4