A - 15
(3) Precautions for battery
(a) For the Q12DCCPU-V
1) About file corruption
The battery must be installed before operation.
• If the C Controller system is operated without a battery and then is
powered off or reset
The data in the standard RAM and battery-backed-up RAM may be
damaged, or a file system error may occur.
• When the battery is not replaced even after a battery error
The standard RAM or battery-backed-up RAM data or clock data may be
corrupted, or a file system error may occur.
2) Battery replacement
For battery replacement, observe the procedures described in this manual.
( Page 6-53, Section 6.7.3 (4))
(b) For the Q06CCPU-V(-B)
1) About file corruption
• When the battery is not replaced even after a battery error
The standard ROM and battery-backed-up RAM data being accessed and
clock data may be corrupted, or a file system error may occur.
• If the C Controller system is operated without a battery and then shut
down improperly
The standard ROM and battery-backed-up RAM data being accessed
may be corrupted, or a file system error may occur.
• When the procedures shown in Page 6-54, Section 6.7.4 are not observed
The standard ROM and battery-backed-up RAM data being accessed
may be corrupted, or a file system error may occur.
2) Restrictions on operations without a battery
• Powering on the system without a battery
If the C Controller system is powered on with no battery installed in the C
Controller module, the system will start with unreliable clock data.
Set clock data in this case. Otherwise, event history files and programs
using clock data cannot function properly. ( Page 6-54, Section 6.7.4)
• Operating the system without a battery
If the system was operated with no battery installed in the C Controller
module, perform the shutdown operation before powering off or resetting
the C Controller system. ( Page 6-55, Section 6.7.4 (2))
3) Battery replacement
For battery replacement, observe the procedures described in this manual.
( Page 6-53, Section 6.7.3 (4))
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