Mitsubishi C70 User Manual

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5. Hardware Replacement Methods
5.3 Battery inside PLC CPU
5.3 Battery inside PLC CPU
5.3.1 Battery Life
*1 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 %.)
*2 The guaranteed value; 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)).
*3 The actual service 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.
*4 In the following status, the backup time after power OFF is 3 minutes.
- The battery connector is disconnected.
- The battery lead wire is broken.
PLC CPU module
type
Power-on time
ratio *1
Battery life
Guaranteed
value *2 (70 ℃ )
Actual service
value *3 (40 ℃ )
Backup time
after alarm *4
Q03UDCPU
0% 25300hr 43800hr 600hr
30% 36100hr 43800hr 600hr
50% 43800hr 43800hr 600hr
70% 43800hr 43800hr 600hr
100% 43800hr 43800hr 600hr
Q04UDHCPU
0% 4300hr 32100hr 384hr
30% 6100hr 43800hr 384hr
50% 8600hr 43800hr 384hr
70% 14300hr 43800hr 384hr
100% 43800hr 43800hr 384hr
Q06UDHCPU
(When a file register
is used within 128k
points)
0% 4200hr 32100hr 384hr
30% 6000hr 43800hr 384hr
50% 8400hr 43800hr 384hr
70% 14000hr 43800hr 384hr
100% 43800hr 43800hr 384hr
Q06UDHCPU
(When a file register
is used within 128k
points)
0% 2300hr 19200hr 192hr
30% 3200hr 27400hr 192hr
50% 4600hr 38400hr 192hr
70% 7600hr 43800hr 192hr
100% 43800hr 43800hr 192hr

Mitsubishi C70 Specifications

General

Brand	Mitsubishi
Model	C70
Category	Control Unit
Language	English