Mitsubishi Electric Q172DCPU User Manual page 90

2 SYSTEM CONFIGURATION
Module type Battery type
Q173DCPU/ External battery
Q172DCPU (Q6BAT)
(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.
Do not short a battery.
Do not charge a battery.
Do not disassemble a battery.
Do not burn a battery.
Do not overheat a battery.
Do not solder the battery terminal.
The programs, parameters, absolute position data and latch data of SRAM built-in Motion
CPU module are backed up without using the external battery.
(2) Data back-up of Motion CPU by the external battery
Be sure to use the external battery.
Set the battery (Q6BAT) to battery holder unit (Q170DBATC).
The programs, parameters, absolute position data, and latch data of SRAM built-
in Motion CPU module are backed up without using the external battery.
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.
Power-on time
(Note-2)
ratio
(MIN) (75°C (167°F))
0%
30%
50%
70%
100%
POINTS
The self-discharge influences the life of battery without the connection to Motion
CPU module. The external battery should be exchanged approximately every 4 or
5 years.
And, exchange the battery with a new one in 4 to 5 years even if a total power
failure time is guaranteed value or less.
Battery life (Total power failure time) [h]
Guaranteed value Guaranteed value
(Note-3)
(TYP) (40°C (104°F))
3000
4000
6000
10000
43800
CAUTION
2 - 69
(Note-1)
Actual service value
(Note-5)
(Note-4)
(Reference value)
(TYP) (25°C (77°F))
8000 24000
11000 34000
16000 43800
26000 43800
43800 43800
Backup time
after alarm
90
(After
SM51/SM52
ON)