8. MAINTENANCE AND INSPECTION
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ MELSEC·A
(a) Turn off the A2C.
(b) Disconnect the battery lead connector from the connector on the
(c) Remove the battery from the battery holder by pressing down the
(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.
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)
Battery lead connector