User`s manual

6 - 8
6 INSPECTION AND MAINTENANCE
6.5.1 Battery life
(1) Q173DCPU/Q172DCPU, Q172DEX module battery life
The battery life is shown below.
Battery life (Total power failure time) [h]
(Note-1)
Module type Battery type
Power-on time
ratio
(Note-2)
Guaranteed value
(Note-3)
(MIN) (75°C (167°F))
Guaranteed value
(Note-4)
(TYP) (40°C (104°F))
Actual service value
(Note-5)
(Reference value)
(TYP) (25°C (77°F))
Backup time
after alarm
0% 20000
30% 27000
50% 31000
70% 36000
Q173DCPU/
Q172DCPU
External battery (Q6BAT)
(Note-7)
100% 43800
43800 43800
90
(After
SM51/SM52
ON)
0% 3000 8000 24000
30% 4000 11000 34000
50% 6000 16000 43800
70% 10000 26000 43800
Q170ENC 1
100% 43800 43800 43800
0% 1500 4000 12000
30% 2000 5500 17000
50% 3000 8000 21900
70% 5000 13000 21900
Q172DEX
Internal
battery
(A6BAT/
MR-BAT)
Q170ENC
2
100% 43800 43800 43800
40
(After Error
code 1152
occurrence)
(Note-1) : The actual service value indicates the average value, and the guaranteed time indicates the minimum time.
(Note-2) : The power-on time ratio indicates the ratio of Multiple CPU system power-on time to one day (24 hours).
(When the total power-on time is 17 hours and the total power-off time is 7 hours, the power-on time ratio is 70%.)
(Note-3) : The guaranteed value (MIN) ; 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°C to 75°C (-13 to
167°F) (operating ambient temperature of 0°C to 55°C (32 to 131°F)).
(Note-4) : The guaranteed value (TYP) ; equivalent to the total power failure time that is calculated based on the normal air-conditioned
environment (40°C (104°F)).
(Note-5) : The actual service value (Reference value) ; equivalent to the total power failure time that is calculated based on the measured
value and under the storage ambient temperature of 25°C (77°F). This value is intended for reference only, as it varies with
characteristics of the memory.
(Note-6) : In the following status, the backup time after power OFF is 3 minutes.
• The battery connector/Q6BAT lead connector is disconnected.
• The battery cable/lead wire of Q6BAT is broken.
(Note-7) : Set the battery (Q6BAT) to battery holder unit (Q170DBATC).