Mitsubishi Electric Melsec A Series - 4.6 Program Comparisons; 4.6.1 Comparison of link special relay (SB);link special register (SW)

8. MAINTENANCE AND INSPECTION
___________________ MELSEC·A
8.3.2 Replacing procedures
I
(1) Procedures
(a) Turn off
the A2C.
(b) Disconnect
the battery lead connector from the connector on the
A2C board.
(c) Remove
the battery from the battery holder by pressing down the
holder lug.
(d) Insert a new battery.
(e) Connect
the battery lead connector with the battery connector on
the A2C board.
(I) Turn on the A2C.
(g) Check that
the low battery flag (M9006) is reset. If it is set, replace
the battery again.
(2) Caution
Replace the battery within
the guaranteed period specified in Table 8.4.
If it takes
longer than the guaranteed period, sequence programs or
latched data would be lost.
Table 8.4 Capacitor Backup Time
Capacitor backUp time (mInute)
Guaranteed period (MINIMUM)
Under normal operating conditions (TYP)
•
9
20
A2CCPU
A2CCPUP21/R21
Red lead
Battery lead connector
Battery
~E~~~~ Blue lead
Board connector
8-4