8. MAINTENANCE AND INSPECTION
--------------------
MELSEC-A
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.
•
8-3
To Next Page
Loading...
