Replacement Of Battery; Battery Ike - Mitsubishi Electric MELSEC-A Series User Manual

8.
MAINTENANCE AND INSPECTION
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8.3 Replacement of Battery
M9006 or M9007 turns on when the voltage of battery for program backup
I
and power failure compensation reduces. Even if the special relay turns on,
the contents of the program and power failure compensation are not lost
immediately. However, if the ON state is overlooked, the PC contents may
be lost.
8.3.1 Battery life
The period in which stored data is guaranteed will vary depending on device
memory capacity to be retained or length of power failure. However, as a
preventive maintenance measure, it is recommended to replace the battery
after 4 or 5 years of use even if the total power failure time is less than the
guaranteed period.
Table 8.3 Battery Life
Bal1ery Life (Total power fellure time) [Hr)
Guaranteed value (Min)
Actually applied value
M900e or M9007 Turn. ON
(Typ)
5400 13000 166
*
The actually applied value indicates a typical value and the guaranteed value Indicates
the minimum value.
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